source-map - npm Package Compare versions

Comparing version 0.8.0-beta.0 to 0.8.0

lib/array-set.js

@@ -63,3 +63,3 @@ /* -*- Mode: js; js-indent-level: 2; -*- */
   has(aStr) {
-      return this._set.has(aStr);
+    return this._set.has(aStr);
   }
@@ -75,3 +75,3 @@
     if (idx >= 0) {
-        return idx;
+      return idx;
     }
@@ -78,0 +78,0 @@ throw new Error('"' + aStr + '" is not in the set.');

lib/base64-vlq.js

@@ -70,23 +70,6 @@ /* -*- Mode: js; js-indent-level: 2; -*- */
 function toVLQSigned(aValue) {
-  return aValue < 0
-    ? ((-aValue) << 1) + 1
-    : (aValue << 1) + 0;
+  return aValue < 0 ? (-aValue << 1) + 1 : (aValue << 1) + 0;
 }
 
 /**
- * Converts to a two-complement value from a value where the sign bit is
- * placed in the least significant bit.  For example, as decimals:
- *   2 (10 binary) becomes 1, 3 (11 binary) becomes -1
- *   4 (100 binary) becomes 2, 5 (101 binary) becomes -2
- */
-// eslint-disable-next-line no-unused-vars
-function fromVLQSigned(aValue) {
-  const isNegative = (aValue & 1) === 1;
-  const shifted = aValue >> 1;
-  return isNegative
-    ? -shifted
-    : shifted;
-}
-
-/**
  * Returns the base 64 VLQ encoded value.
@@ -93,0 +76,0 @@ */

lib/base64.js

@@ -8,3 +8,4 @@ /* -*- Mode: js; js-indent-level: 2; -*- */
 
-const intToCharMap = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".split("");
+const intToCharMap =
+  "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".split("");
 
@@ -14,3 +15,3 @@ /**
  */
-exports.encode = function(number) {
+exports.encode = function (number) {
   if (0 <= number && number < intToCharMap.length) {
@@ -17,0 +18,0 @@ return intToCharMap[number];

lib/binary-search.js

@@ -48,3 +48,3 @@ /* -*- Mode: js; js-indent-level: 2; -*- */
     // we are in termination case (3) or (2) and return the appropriate thing.
-    if (aBias == exports.LEAST_UPPER_BOUND) {
+    if (aBias === exports.LEAST_UPPER_BOUND) {
       return aHigh < aHaystack.length ? aHigh : -1;
@@ -91,4 +91,10 @@ }
 
-  let index = recursiveSearch(-1, aHaystack.length, aNeedle, aHaystack,
-                              aCompare, aBias || exports.GREATEST_LOWER_BOUND);
+  let index = recursiveSearch(
+    -1,
+    aHaystack.length,
+    aNeedle,
+    aHaystack,
+    aCompare,
+    aBias || exports.GREATEST_LOWER_BOUND
+  );
   if (index < 0) {
@@ -98,3 +104,3 @@ return -1;
 
-  // We have found either the exact element, or the next-closest element than
+  // We have found either the exact element, or the next-closest element to
   // the one we are searching for. However, there may be more than one such
@@ -101,0 +107,0 @@ // element. Make sure we always return the smallest of these.

lib/mapping-list.js

@@ -20,4 +20,7 @@ /* -*- Mode: js; js-indent-level: 2; -*- */
   const columnB = mappingB.generatedColumn;
-  return lineB > lineA || lineB == lineA && columnB >= columnA ||
-         util.compareByGeneratedPositionsInflated(mappingA, mappingB) <= 0;
+  return (
+    lineB > lineA ||
+    (lineB == lineA && columnB >= columnA) ||
+    util.compareByGeneratedPositionsInflated(mappingA, mappingB) <= 0
+  );
 }
@@ -35,3 +38,3 @@
     // Serves as infimum
-    this._last = {generatedLine: -1, generatedColumn: 0};
+    this._last = { generatedLine: -1, generatedColumn: 0 };
   }
@@ -38,0 +41,0 @@

lib/read-wasm-browser.js

@@ -7,4 +7,3 @@ "use strict";
   if (typeof mappingsWasm === "string") {
-    return fetch(mappingsWasm)
-      .then(response => response.arrayBuffer());
+    return fetch(mappingsWasm).then(response => response.arrayBuffer());
   }
@@ -15,6 +14,8 @@ if (mappingsWasm instanceof ArrayBuffer) {
 
-  throw new Error("You must provide the string URL or ArrayBuffer contents " +
-                  "of lib/mappings.wasm by calling " +
-                  "SourceMapConsumer.initialize({ 'lib/mappings.wasm': ... }) " +
-                  "before using SourceMapConsumer");
+  throw new Error(
+    "You must provide the string URL or ArrayBuffer contents " +
+      "of lib/mappings.wasm by calling " +
+      "SourceMapConsumer.initialize({ 'lib/mappings.wasm': ... }) " +
+      "before using SourceMapConsumer"
+  );
 };
@@ -21,0 +22,0 @@

lib/read-wasm.js

@@ -24,3 +24,5 @@ "use strict";
 module.exports.initialize = _ => {
-  console.debug("SourceMapConsumer.initialize is a no-op when running in node.js");
+  console.debug(
+    "SourceMapConsumer.initialize is a no-op when running in node.js"
+  );
 };

lib/source-map-consumer.js

@@ -190,2 +190,7 @@ /* -*- Mode: js; js-indent-level: 2; -*- */
       const file = util.getArg(sourceMap, "file", null);
+      const x_google_ignoreList = util.getArg(
+        sourceMap,
+        "x_google_ignoreList",
+        null
+      );
 
@@ -207,5 +212,8 @@ // Once again, Sass deviates from the spec and supplies the version as a
 
-      that._absoluteSources = ArraySet.fromArray(that._sources.toArray().map(function(s) {
-        return util.computeSourceURL(sourceRoot, s, aSourceMapURL);
-      }), true);
+      that._absoluteSources = ArraySet.fromArray(
+        that._sources.toArray().map(function (s) {
+          return util.computeSourceURL(sourceRoot, s, aSourceMapURL);
+        }),
+        true
+      );
 
@@ -217,2 +225,3 @@ that.sourceRoot = sourceRoot;
       that.file = file;
+      that.x_google_ignoreList = x_google_ignoreList;
 
@@ -243,3 +252,7 @@ that._computedColumnSpans = false;
     // Treat the source as map-relative overall by default.
-    const sourceAsMapRelative = util.computeSourceURL(null, aSource, this._sourceMapURL);
+    const sourceAsMapRelative = util.computeSourceURL(
+      null,
+      aSource,
+      this._sourceMapURL
+    );
     if (this._absoluteSources.has(sourceAsMapRelative)) {
@@ -252,3 +265,7 @@ const index = this._absoluteSources.indexOf(sourceAsMapRelative);
     // Fall back to treating the source as sourceRoot-relative.
-    const sourceAsSourceRootRelative = util.computeSourceURL(this.sourceRoot, aSource, this._sourceMapURL);
+    const sourceAsSourceRootRelative = util.computeSourceURL(
+      this.sourceRoot,
+      aSource,
+      this._sourceMapURL
+    );
     if (this._absoluteSources.has(sourceAsSourceRootRelative)) {
@@ -298,4 +315,10 @@ const index = this._absoluteSources.indexOf(sourceAsSourceRootRelative);
 
-    const mappingsBufPtr = this._wasm.exports.allocate_mappings(size);
-    const mappingsBuf = new Uint8Array(this._wasm.exports.memory.buffer, mappingsBufPtr, size);
+    // Interpret signed result of allocate_mappings as unsigned, otherwise
+    // addresses higher than 2GB will be negative.
+    const mappingsBufPtr = this._wasm.exports.allocate_mappings(size) >>> 0;
+    const mappingsBuf = new Uint8Array(
+      this._wasm.exports.memory.buffer,
+      mappingsBufPtr,
+      size
+    );
     for (let i = 0; i < size; i++) {
@@ -311,6 +334,7 @@ mappingsBuf[i] = aStr.charCodeAt(i);
 
-      // XXX: keep these error codes in sync with `fitzgen/source-map-mappings`.
+      // XXX: keep these error codes in sync with `wasm-mappings`.
       switch (error) {
         case 1:
-          msg += "the mappings contained a negative line, column, source index, or name index";
+          msg +=
+            "the mappings contained a negative line, column, source index, or name index";
           break;
@@ -358,10 +382,10 @@ case 2:
         switch (order) {
-        case SourceMapConsumer.GENERATED_ORDER:
-          this._wasm.exports.by_generated_location(this._getMappingsPtr());
-          break;
-        case SourceMapConsumer.ORIGINAL_ORDER:
-          this._wasm.exports.by_original_location(this._getMappingsPtr());
-          break;
-        default:
-          throw new Error("Unknown order of iteration.");
+          case SourceMapConsumer.GENERATED_ORDER:
+            this._wasm.exports.by_generated_location(this._getMappingsPtr());
+            break;
+          case SourceMapConsumer.ORIGINAL_ORDER:
+            this._wasm.exports.by_original_location(this._getMappingsPtr());
+            break;
+          default:
+            throw new Error("Unknown order of iteration.");
         }
@@ -403,3 +427,4 @@ }
         });
-      }, () => {
+      },
+      () => {
         this._wasm.exports.all_generated_locations_for(
@@ -465,3 +490,3 @@ this._getMappingsPtr(),
       generatedLine: util.getArg(aArgs, "line"),
-      generatedColumn: util.getArg(aArgs, "column")
+      generatedColumn: util.getArg(aArgs, "column"),
     };
@@ -477,3 +502,7 @@
 
-    let bias = util.getArg(aArgs, "bias", SourceMapConsumer.GREATEST_LOWER_BOUND);
+    let bias = util.getArg(
+      aArgs,
+      "bias",
+      SourceMapConsumer.GREATEST_LOWER_BOUND
+    );
     if (bias == null) {
@@ -484,10 +513,13 @@ bias = SourceMapConsumer.GREATEST_LOWER_BOUND;
     let mapping;
-    this._wasm.withMappingCallback(m => mapping = m, () => {
-      this._wasm.exports.original_location_for(
-        this._getMappingsPtr(),
-        needle.generatedLine - 1,
-        needle.generatedColumn,
-        bias
-      );
-    });
+    this._wasm.withMappingCallback(
+      m => (mapping = m),
+      () => {
+        this._wasm.exports.original_location_for(
+          this._getMappingsPtr(),
+          needle.generatedLine - 1,
+          needle.generatedColumn,
+          bias
+        );
+      }
+    );
 
@@ -510,3 +542,3 @@ if (mapping) {
           column: util.getArg(mapping, "originalColumn", null),
-          name
+          name,
         };
@@ -520,3 +552,3 @@ }
       column: null,
-      name: null
+      name: null,
     };
@@ -533,4 +565,8 @@ }
     }
-    return this.sourcesContent.length >= this._sources.size() &&
-      !this.sourcesContent.some(function(sc) { return sc == null; });
+    return (
+      this.sourcesContent.length >= this._sources.size() &&
+      !this.sourcesContent.some(function (sc) {
+        return sc == null;
+      })
+    );
   }
@@ -594,3 +630,3 @@
         column: null,
-        lastColumn: null
+        lastColumn: null,
       };
@@ -602,3 +638,3 @@ }
       originalLine: util.getArg(aArgs, "line"),
-      originalColumn: util.getArg(aArgs, "column")
+      originalColumn: util.getArg(aArgs, "column"),
     };
@@ -614,3 +650,7 @@
 
-    let bias = util.getArg(aArgs, "bias", SourceMapConsumer.GREATEST_LOWER_BOUND);
+    let bias = util.getArg(
+      aArgs,
+      "bias",
+      SourceMapConsumer.GREATEST_LOWER_BOUND
+    );
     if (bias == null) {
@@ -621,11 +661,14 @@ bias = SourceMapConsumer.GREATEST_LOWER_BOUND;
     let mapping;
-    this._wasm.withMappingCallback(m => mapping = m, () => {
-      this._wasm.exports.generated_location_for(
-        this._getMappingsPtr(),
-        needle.source,
-        needle.originalLine - 1,
-        needle.originalColumn,
-        bias
-      );
-    });
+    this._wasm.withMappingCallback(
+      m => (mapping = m),
+      () => {
+        this._wasm.exports.generated_location_for(
+          this._getMappingsPtr(),
+          needle.source,
+          needle.originalLine - 1,
+          needle.originalColumn,
+          bias
+        );
+      }
+    );
 
@@ -649,3 +692,3 @@ if (mapping) {
       column: null,
-      lastColumn: null
+      lastColumn: null,
     };
@@ -724,33 +767,44 @@ }
         line: -1,
-        column: 0
+        column: 0,
       };
-      return Promise.all(sections.map(s => {
-        if (s.url) {
-          // The url field will require support for asynchronicity.
-          // See https://github.com/mozilla/source-map/issues/16
-          throw new Error("Support for url field in sections not implemented.");
-        }
-        const offset = util.getArg(s, "offset");
-        const offsetLine = util.getArg(offset, "line");
-        const offsetColumn = util.getArg(offset, "column");
+      return Promise.all(
+        sections.map(s => {
+          if (s.url) {
+            // The url field will require support for asynchronicity.
+            // See https://github.com/mozilla/source-map/issues/16
+            throw new Error(
+              "Support for url field in sections not implemented."
+            );
+          }
+          const offset = util.getArg(s, "offset");
+          const offsetLine = util.getArg(offset, "line");
+          const offsetColumn = util.getArg(offset, "column");
 
-        if (offsetLine < lastOffset.line ||
-            (offsetLine === lastOffset.line && offsetColumn < lastOffset.column)) {
-          throw new Error("Section offsets must be ordered and non-overlapping.");
-        }
-        lastOffset = offset;
+          if (
+            offsetLine < lastOffset.line ||
+            (offsetLine === lastOffset.line && offsetColumn < lastOffset.column)
+          ) {
+            throw new Error(
+              "Section offsets must be ordered and non-overlapping."
+            );
+          }
+          lastOffset = offset;
 
-        const cons = new SourceMapConsumer(util.getArg(s, "map"), aSourceMapURL);
-        return cons.then(consumer => {
-          return {
-            generatedOffset: {
-              // The offset fields are 0-based, but we use 1-based indices when
-              // encoding/decoding from VLQ.
-              generatedLine: offsetLine + 1,
-              generatedColumn: offsetColumn + 1
-            },
-            consumer
-          };
-        });
-      })).then(s => {
+          const cons = new SourceMapConsumer(
+            util.getArg(s, "map"),
+            aSourceMapURL
+          );
+          return cons.then(consumer => {
+            return {
+              generatedOffset: {
+                // The offset fields are 0-based, but we use 1-based indices when
+                // encoding/decoding from VLQ.
+                generatedLine: offsetLine + 1,
+                generatedColumn: offsetColumn + 1,
+              },
+              consumer,
+            };
+          });
+        })
+      ).then(s => {
         that._sections = s;
@@ -797,3 +851,3 @@ return that;
       generatedLine: util.getArg(aArgs, "line"),
-      generatedColumn: util.getArg(aArgs, "column")
+      generatedColumn: util.getArg(aArgs, "column"),
     };
@@ -803,5 +857,8 @@
     // to an original position.
-    const sectionIndex = binarySearch.search(needle, this._sections,
-      function(aNeedle, section) {
-        const cmp = aNeedle.generatedLine - section.generatedOffset.generatedLine;
+    const sectionIndex = binarySearch.search(
+      needle,
+      this._sections,
+      function (aNeedle, section) {
+        const cmp =
+          aNeedle.generatedLine - section.generatedOffset.generatedLine;
         if (cmp) {
@@ -811,5 +868,10 @@ return cmp;
 
-        return (aNeedle.generatedColumn -
-                section.generatedOffset.generatedColumn);
-      });
+        // The generated column is 0-based, but the section offset column is
+        // stored 1-based.
+        return (
+          aNeedle.generatedColumn -
+          (section.generatedOffset.generatedColumn - 1)
+        );
+      }
+    );
     const section = this._sections[sectionIndex];
@@ -822,3 +884,3 @@
         column: null,
-        name: null
+        name: null,
       };
@@ -828,9 +890,9 @@ }
     return section.consumer.originalPositionFor({
-      line: needle.generatedLine -
-        (section.generatedOffset.generatedLine - 1),
-      column: needle.generatedColumn -
+      line: needle.generatedLine - (section.generatedOffset.generatedLine - 1),
+      column:
+        needle.generatedColumn -
         (section.generatedOffset.generatedLine === needle.generatedLine
-         ? section.generatedOffset.generatedColumn - 1
-         : 0),
-      bias: aArgs.bias
+          ? section.generatedOffset.generatedColumn - 1
+          : 0),
+      bias: aArgs.bias,
     });
@@ -844,3 +906,3 @@ }
   hasContentsOfAllSources() {
-    return this._sections.every(function(s) {
+    return this._sections.every(function (s) {
       return s.consumer.hasContentsOfAllSources();
@@ -935,3 +997,3 @@ });
       column: null,
-      lastColumn: null
+      lastColumn: null,
     };
@@ -950,4 +1012,5 @@ }
 
-    return section.consumer.allGeneratedPositionsFor(aArgs).map(
-      generatedPosition => {
+    return section.consumer
+      .allGeneratedPositionsFor(aArgs)
+      .map(generatedPosition => {
         const lineShift = section.generatedOffset.generatedLine - 1;
@@ -974,4 +1037,3 @@ const columnShift = section.generatedOffset.generatedColumn - 1;
         return generatedPosition;
-      }
-    );
+      });
   }
@@ -982,5 +1044,3 @@
       const nextSection =
-        index + 1 < this._sections.length
-          ? this._sections[index + 1]
-          : null;
+        index + 1 < this._sections.length ? this._sections[index + 1] : null;
       const { generatedOffset } = section;
@@ -991,23 +1051,27 @@
 
-      section.consumer.eachMapping(function(mapping) {
-        if (mapping.generatedLine === 1) {
-          mapping.generatedColumn += columnShift;
+      section.consumer.eachMapping(
+        function (mapping) {
+          if (mapping.generatedLine === 1) {
+            mapping.generatedColumn += columnShift;
 
-          if (typeof mapping.lastGeneratedColumn === "number") {
-            mapping.lastGeneratedColumn += columnShift;
+            if (typeof mapping.lastGeneratedColumn === "number") {
+              mapping.lastGeneratedColumn += columnShift;
+            }
           }
-        }
 
-        if (
-          mapping.lastGeneratedColumn === Infinity &&
-          nextSection &&
-          mapping.generatedLine === nextSection.generatedOffset.generatedLine
-        ) {
-          mapping.lastGeneratedColumn =
-            nextSection.generatedOffset.generatedColumn - 2;
-        }
-        mapping.generatedLine += lineShift;
+          if (
+            mapping.lastGeneratedColumn === Infinity &&
+            nextSection &&
+            mapping.generatedLine === nextSection.generatedOffset.generatedLine
+          ) {
+            mapping.lastGeneratedColumn =
+              nextSection.generatedOffset.generatedColumn - 2;
+          }
+          mapping.generatedLine += lineShift;
 
-        aCallback.call(this, mapping);
-      }, aContext, aOrder);
+          aCallback.call(this, mapping);
+        },
+        aContext,
+        aOrder
+      );
     });
@@ -1040,3 +1104,4 @@ }
 
-  const consumer = sourceMap.sections != null
+  const consumer =
+    sourceMap.sections != null
       ? new IndexedSourceMapConsumer(sourceMap, aSourceMapURL)
@@ -1043,0 +1108,0 @@ : new BasicSourceMapConsumer(sourceMap, aSourceMapURL);

lib/source-map-generator.js

@@ -44,10 +44,10 @@ /* -*- Mode: js; js-indent-level: 2; -*- */
       file: aSourceMapConsumer.file,
-      sourceRoot
+      sourceRoot,
     });
-    aSourceMapConsumer.eachMapping(function(mapping) {
+    aSourceMapConsumer.eachMapping(function (mapping) {
       const newMapping = {
         generated: {
           line: mapping.generatedLine,
-          column: mapping.generatedColumn
-        }
+          column: mapping.generatedColumn,
+        },
       };
@@ -63,3 +63,3 @@
           line: mapping.originalLine,
-          column: mapping.originalColumn
+          column: mapping.originalColumn,
         };
@@ -74,5 +74,5 @@
     });
-    aSourceMapConsumer.sources.forEach(function(sourceFile) {
+    aSourceMapConsumer.sources.forEach(function (sourceFile) {
       let sourceRelative = sourceFile;
-      if (sourceRoot !== null) {
+      if (sourceRoot != null) {
         sourceRelative = util.relative(sourceRoot, sourceFile);
@@ -130,6 +130,6 @@ }
       generatedColumn: generated.column,
-      originalLine: original != null && original.line,
-      originalColumn: original != null && original.column,
+      originalLine: original && original.line,
+      originalColumn: original && original.column,
       source,
-      name
+      name,
     });
@@ -187,3 +187,3 @@ }
           "SourceMapGenerator.prototype.applySourceMap requires either an explicit source file, " +
-          'or the source map\'s "file" property. Both were omitted.'
+            'or the source map\'s "file" property. Both were omitted.'
         );
@@ -200,9 +200,8 @@ }
     // the names array.
-    const newSources = this._mappings.toArray().length > 0
-      ? new ArraySet()
-      : this._sources;
+    const newSources =
+      this._mappings.toArray().length > 0 ? new ArraySet() : this._sources;
     const newNames = new ArraySet();
 
     // Find mappings for the "sourceFile"
-    this._mappings.unsortedForEach(function(mapping) {
+    this._mappings.unsortedForEach(function (mapping) {
       if (mapping.source === sourceFile && mapping.originalLine != null) {
@@ -212,3 +211,3 @@ // Check if it can be mapped by the source map, then update the mapping.
           line: mapping.originalLine,
-          column: mapping.originalColumn
+          column: mapping.originalColumn,
         });
@@ -241,3 +240,2 @@ if (original.source != null) {
       }
-
     }, this);
@@ -248,3 +246,3 @@ this._sources = newSources;
     // Copy sourcesContents of applied map.
-    aSourceMapConsumer.sources.forEach(function(srcFile) {
+    aSourceMapConsumer.sources.forEach(function (srcFile) {
       const content = aSourceMapConsumer.sourceContentFor(srcFile);
@@ -279,29 +277,49 @@ if (content != null) {
     // For example: https://github.com/Polymer/polymer-bundler/pull/519
-    if (aOriginal && typeof aOriginal.line !== "number" && typeof aOriginal.column !== "number") {
-        throw new Error(
-            "original.line and original.column are not numbers -- you probably meant to omit " +
-            "the original mapping entirely and only map the generated position. If so, pass " +
-            "null for the original mapping instead of an object with empty or null values."
-        );
+    if (
+      aOriginal &&
+      typeof aOriginal.line !== "number" &&
+      typeof aOriginal.column !== "number"
+    ) {
+      throw new Error(
+        "original.line and original.column are not numbers -- you probably meant to omit " +
+          "the original mapping entirely and only map the generated position. If so, pass " +
+          "null for the original mapping instead of an object with empty or null values."
+      );
     }
 
-    if (aGenerated && "line" in aGenerated && "column" in aGenerated
-        && aGenerated.line > 0 && aGenerated.column >= 0
-        && !aOriginal && !aSource && !aName) {
+    if (
+      aGenerated &&
+      "line" in aGenerated &&
+      "column" in aGenerated &&
+      aGenerated.line > 0 &&
+      aGenerated.column >= 0 &&
+      !aOriginal &&
+      !aSource &&
+      !aName
+    ) {
       // Case 1.
-
-    } else if (aGenerated && "line" in aGenerated && "column" in aGenerated
-             && aOriginal && "line" in aOriginal && "column" in aOriginal
-             && aGenerated.line > 0 && aGenerated.column >= 0
-             && aOriginal.line > 0 && aOriginal.column >= 0
-             && aSource) {
+    } else if (
+      aGenerated &&
+      "line" in aGenerated &&
+      "column" in aGenerated &&
+      aOriginal &&
+      "line" in aOriginal &&
+      "column" in aOriginal &&
+      aGenerated.line > 0 &&
+      aGenerated.column >= 0 &&
+      aOriginal.line > 0 &&
+      aOriginal.column >= 0 &&
+      aSource
+    ) {
       // Cases 2 and 3.
-
     } else {
-      throw new Error("Invalid mapping: " + JSON.stringify({
-        generated: aGenerated,
-        source: aSource,
-        original: aOriginal,
-        name: aName
-      }));
+      throw new Error(
+        "Invalid mapping: " +
+          JSON.stringify({
+            generated: aGenerated,
+            source: aSource,
+            original: aOriginal,
+            name: aName,
+          })
+      );
     }
@@ -339,3 +357,5 @@ }
       } else if (i > 0) {
-        if (!util.compareByGeneratedPositionsInflated(mapping, mappings[i - 1])) {
+        if (
+          !util.compareByGeneratedPositionsInflated(mapping, mappings[i - 1])
+        ) {
           continue;
@@ -346,4 +366,5 @@ }
 
-      next += base64VLQ.encode(mapping.generatedColumn
-                                 - previousGeneratedColumn);
+      next += base64VLQ.encode(
+        mapping.generatedColumn - previousGeneratedColumn
+      );
       previousGeneratedColumn = mapping.generatedColumn;
@@ -357,8 +378,10 @@
         // lines are stored 0-based in SourceMap spec version 3
-        next += base64VLQ.encode(mapping.originalLine - 1
-                                   - previousOriginalLine);
+        next += base64VLQ.encode(
+          mapping.originalLine - 1 - previousOriginalLine
+        );
         previousOriginalLine = mapping.originalLine - 1;
 
-        next += base64VLQ.encode(mapping.originalColumn
-                                   - previousOriginalColumn);
+        next += base64VLQ.encode(
+          mapping.originalColumn - previousOriginalColumn
+        );
         previousOriginalColumn = mapping.originalColumn;
@@ -380,3 +403,3 @@
   _generateSourcesContent(aSources, aSourceRoot) {
-    return aSources.map(function(source) {
+    return aSources.map(function (source) {
       if (!this._sourcesContents) {
@@ -403,3 +426,3 @@ return null;
       names: this._names.toArray(),
-      mappings: this._serializeMappings()
+      mappings: this._serializeMappings(),
     };
@@ -413,3 +436,6 @@ if (this._file != null) {
     if (this._sourcesContents) {
-      map.sourcesContent = this._generateSourcesContent(map.sources, map.sourceRoot);
+      map.sourcesContent = this._generateSourcesContent(
+        map.sources,
+        map.sourceRoot
+      );
     }
@@ -416,0 +442,0 @@

lib/source-node.js

@@ -38,3 +38,3 @@ /* -*- Mode: js; js-indent-level: 2; -*- */
     this.children = [];
-    this.sourceContents = {};
+    this.sourceContents = Object.create(null);
     this.line = aLine == null ? null : aLine;
@@ -56,3 +56,7 @@ this.column = aColumn == null ? null : aColumn;
    */
-  static fromStringWithSourceMap(aGeneratedCode, aSourceMapConsumer, aRelativePath) {
+  static fromStringWithSourceMap(
+    aGeneratedCode,
+    aSourceMapConsumer,
+    aRelativePath
+  ) {
     // The SourceNode we want to fill with the generated code
@@ -68,3 +72,3 @@ // and the SourceMap
     let remainingLinesIndex = 0;
-    const shiftNextLine = function() {
+    const shiftNextLine = function () {
       const lineContents = getNextLine();
@@ -76,4 +80,5 @@ // The last line of a file might not have a newline.
       function getNextLine() {
-        return remainingLinesIndex < remainingLines.length ?
-            remainingLines[remainingLinesIndex++] : undefined;
+        return remainingLinesIndex < remainingLines.length
+          ? remainingLines[remainingLinesIndex++]
+          : undefined;
       }
@@ -83,3 +88,4 @@ };
     // We need to remember the position of "remainingLines"
-    let lastGeneratedLine = 1, lastGeneratedColumn = 0;
+    let lastGeneratedLine = 1,
+      lastGeneratedColumn = 0;
 
@@ -92,3 +98,3 @@ // The generate SourceNodes we need a code range.
 
-    aSourceMapConsumer.eachMapping(function(mapping) {
+    aSourceMapConsumer.eachMapping(function (mapping) {
       if (lastMapping !== null) {
@@ -108,6 +114,9 @@ // We add the code from "lastMapping" to "mapping":
           nextLine = remainingLines[remainingLinesIndex] || "";
-          const code = nextLine.substr(0, mapping.generatedColumn -
-                                        lastGeneratedColumn);
-          remainingLines[remainingLinesIndex] = nextLine.substr(mapping.generatedColumn -
-                                              lastGeneratedColumn);
+          const code = nextLine.substr(
+            0,
+            mapping.generatedColumn - lastGeneratedColumn
+          );
+          remainingLines[remainingLinesIndex] = nextLine.substr(
+            mapping.generatedColumn - lastGeneratedColumn
+          );
           lastGeneratedColumn = mapping.generatedColumn;
@@ -130,3 +139,5 @@ addMappingWithCode(lastMapping, code);
         node.add(nextLine.substr(0, mapping.generatedColumn));
-        remainingLines[remainingLinesIndex] = nextLine.substr(mapping.generatedColumn);
+        remainingLines[remainingLinesIndex] = nextLine.substr(
+          mapping.generatedColumn
+        );
         lastGeneratedColumn = mapping.generatedColumn;
@@ -147,3 +158,3 @@ }
     // Copy sourcesContent into SourceNode
-    aSourceMapConsumer.sources.forEach(function(sourceFile) {
+    aSourceMapConsumer.sources.forEach(function (sourceFile) {
       const content = aSourceMapConsumer.sourceContentFor(sourceFile);
@@ -167,7 +178,11 @@ if (content != null) {
           : mapping.source;
-        node.add(new SourceNode(mapping.originalLine,
-                                mapping.originalColumn,
-                                source,
-                                code,
-                                mapping.name));
+        node.add(
+          new SourceNode(
+            mapping.originalLine,
+            mapping.originalColumn,
+            source,
+            code,
+            mapping.name
+          )
+        );
       }
@@ -185,3 +200,3 @@ }
     if (Array.isArray(aChunk)) {
-      aChunk.forEach(function(chunk) {
+      aChunk.forEach(function (chunk) {
         this.add(chunk);
@@ -195,3 +210,4 @@ }, this);
       throw new TypeError(
-        "Expected a SourceNode, string, or an array of SourceNodes and strings. Got " + aChunk
+        "Expected a SourceNode, string, or an array of SourceNodes and strings. Got " +
+          aChunk
       );
@@ -217,3 +233,4 @@ }
       throw new TypeError(
-        "Expected a SourceNode, string, or an array of SourceNodes and strings. Got " + aChunk
+        "Expected a SourceNode, string, or an array of SourceNodes and strings. Got " +
+          aChunk
       );
@@ -238,6 +255,8 @@ }
       } else if (chunk !== "") {
-        aFn(chunk, { source: this.source,
-                      line: this.line,
-                      column: this.column,
-                      name: this.name });
+        aFn(chunk, {
+          source: this.source,
+          line: this.line,
+          column: this.column,
+          name: this.name,
+        });
       }
@@ -281,3 +300,6 @@ }
     } else if (typeof lastChild === "string") {
-      this.children[this.children.length - 1] = lastChild.replace(aPattern, aReplacement);
+      this.children[this.children.length - 1] = lastChild.replace(
+        aPattern,
+        aReplacement
+      );
     } else {
@@ -325,3 +347,3 @@ this.children.push("".replace(aPattern, aReplacement));
     let str = "";
-    this.walk(function(chunk) {
+    this.walk(function (chunk) {
       str += chunk;
@@ -340,3 +362,3 @@ });
       line: 1,
-      column: 0
+      column: 0,
     };
@@ -349,11 +371,15 @@ const map = new SourceMapGenerator(aArgs);
     let lastOriginalName = null;
-    this.walk(function(chunk, original) {
+    this.walk(function (chunk, original) {
       generated.code += chunk;
-      if (original.source !== null
-          && original.line !== null
-          && original.column !== null) {
-        if (lastOriginalSource !== original.source
-          || lastOriginalLine !== original.line
-          || lastOriginalColumn !== original.column
-          || lastOriginalName !== original.name) {
+      if (
+        original.source !== null &&
+        original.line !== null &&
+        original.column !== null
+      ) {
+        if (
+          lastOriginalSource !== original.source ||
+          lastOriginalLine !== original.line ||
+          lastOriginalColumn !== original.column ||
+          lastOriginalName !== original.name
+        ) {
           map.addMapping({
@@ -363,9 +389,9 @@ source: original.source,
               line: original.line,
-              column: original.column
+              column: original.column,
             },
             generated: {
               line: generated.line,
-              column: generated.column
+              column: generated.column,
             },
-            name: original.name
+            name: original.name,
           });
@@ -382,4 +408,4 @@ }
             line: generated.line,
-            column: generated.column
-          }
+            column: generated.column,
+          },
         });
@@ -402,9 +428,9 @@ lastOriginalSource = null;
                 line: original.line,
-                column: original.column
+                column: original.column,
               },
               generated: {
                 line: generated.line,
-                column: generated.column
+                column: generated.column,
               },
-              name: original.name
+              name: original.name,
             });
@@ -417,3 +443,3 @@ }
     });
-    this.walkSourceContents(function(sourceFile, sourceContent) {
+    this.walkSourceContents(function (sourceFile, sourceContent) {
       map.setSourceContent(sourceFile, sourceContent);
@@ -420,0 +446,0 @@ });

lib/util.js

@@ -26,11 +26,10 @@ /* -*- Mode: js; js-indent-level: 2; -*- */
   }
-    throw new Error('"' + aName + '" is a required argument.');
-
+  throw new Error('"' + aName + '" is a required argument.');
 }
 exports.getArg = getArg;
 
-const supportsNullProto = (function() {
+const supportsNullProto = (function () {
   const obj = Object.create(null);
   return !("__proto__" in obj);
-}());
+})();
 
@@ -80,11 +79,13 @@ function identity(s) {
   /* eslint-disable no-multi-spaces */
-  if (s.charCodeAt(length - 1) !== 95  /* '_' */ ||
-      s.charCodeAt(length - 2) !== 95  /* '_' */ ||
-      s.charCodeAt(length - 3) !== 111 /* 'o' */ ||
-      s.charCodeAt(length - 4) !== 116 /* 't' */ ||
-      s.charCodeAt(length - 5) !== 111 /* 'o' */ ||
-      s.charCodeAt(length - 6) !== 114 /* 'r' */ ||
-      s.charCodeAt(length - 7) !== 112 /* 'p' */ ||
-      s.charCodeAt(length - 8) !== 95  /* '_' */ ||
-      s.charCodeAt(length - 9) !== 95  /* '_' */) {
+  if (
+    s.charCodeAt(length - 1) !== 95 /* '_' */ ||
+    s.charCodeAt(length - 2) !== 95 /* '_' */ ||
+    s.charCodeAt(length - 3) !== 111 /* 'o' */ ||
+    s.charCodeAt(length - 4) !== 116 /* 't' */ ||
+    s.charCodeAt(length - 5) !== 111 /* 'o' */ ||
+    s.charCodeAt(length - 6) !== 114 /* 'r' */ ||
+    s.charCodeAt(length - 7) !== 112 /* 'p' */ ||
+    s.charCodeAt(length - 8) !== 95 /* '_' */ ||
+    s.charCodeAt(length - 9) !== 95 /* '_' */
+  ) {
     return false;
@@ -155,3 +156,4 @@ }
 }
-exports.compareByGeneratedPositionsInflated = compareByGeneratedPositionsInflated;
+exports.compareByGeneratedPositionsInflated =
+  compareByGeneratedPositionsInflated;
 
@@ -209,3 +211,3 @@ /**
   do {
-    const ident = prefix + (id++);
+    const ident = prefix + id++;
     if (str.indexOf(ident) === -1) return ident;
@@ -344,3 +346,5 @@ } while (true);
   if (rootType === "scheme-relative") {
-    return withBase(aPath, withBase(aRoot, PROTOCOL_AND_HOST)).slice(PROTOCOL.length);
+    return withBase(aPath, withBase(aRoot, PROTOCOL_AND_HOST)).slice(
+      PROTOCOL.length
+    );
   }
@@ -352,3 +356,5 @@
   if (rootType === "path-absolute") {
-    return withBase(aPath, withBase(aRoot, PROTOCOL_AND_HOST)).slice(PROTOCOL_AND_HOST.length);
+    return withBase(aPath, withBase(aRoot, PROTOCOL_AND_HOST)).slice(
+      PROTOCOL_AND_HOST.length
+    );
   }
@@ -355,0 +361,0 @@

lib/wasm.js

@@ -25,3 +25,4 @@ const readWasm = require("../lib/read-wasm");
 
-  cachedWasm = readWasm().then(buffer => {
+  cachedWasm = readWasm()
+    .then(buffer => {
       return WebAssembly.instantiate(buffer, {
@@ -68,42 +69,72 @@ env: {
 
-          start_all_generated_locations_for() { console.time("all_generated_locations_for"); },
-          end_all_generated_locations_for() { console.timeEnd("all_generated_locations_for"); },
+          start_all_generated_locations_for() {
+            console.time("all_generated_locations_for");
+          },
+          end_all_generated_locations_for() {
+            console.timeEnd("all_generated_locations_for");
+          },
 
-          start_compute_column_spans() { console.time("compute_column_spans"); },
-          end_compute_column_spans() { console.timeEnd("compute_column_spans"); },
+          start_compute_column_spans() {
+            console.time("compute_column_spans");
+          },
+          end_compute_column_spans() {
+            console.timeEnd("compute_column_spans");
+          },
 
-          start_generated_location_for() { console.time("generated_location_for"); },
-          end_generated_location_for() { console.timeEnd("generated_location_for"); },
+          start_generated_location_for() {
+            console.time("generated_location_for");
+          },
+          end_generated_location_for() {
+            console.timeEnd("generated_location_for");
+          },
 
-          start_original_location_for() { console.time("original_location_for"); },
-          end_original_location_for() { console.timeEnd("original_location_for"); },
+          start_original_location_for() {
+            console.time("original_location_for");
+          },
+          end_original_location_for() {
+            console.timeEnd("original_location_for");
+          },
 
-          start_parse_mappings() { console.time("parse_mappings"); },
-          end_parse_mappings() { console.timeEnd("parse_mappings"); },
+          start_parse_mappings() {
+            console.time("parse_mappings");
+          },
+          end_parse_mappings() {
+            console.timeEnd("parse_mappings");
+          },
 
-          start_sort_by_generated_location() { console.time("sort_by_generated_location"); },
-          end_sort_by_generated_location() { console.timeEnd("sort_by_generated_location"); },
+          start_sort_by_generated_location() {
+            console.time("sort_by_generated_location");
+          },
+          end_sort_by_generated_location() {
+            console.timeEnd("sort_by_generated_location");
+          },
 
-          start_sort_by_original_location() { console.time("sort_by_original_location"); },
-          end_sort_by_original_location() { console.timeEnd("sort_by_original_location"); },
-        }
+          start_sort_by_original_location() {
+            console.time("sort_by_original_location");
+          },
+          end_sort_by_original_location() {
+            console.timeEnd("sort_by_original_location");
+          },
+        },
       });
-  }).then(Wasm => {
-    return {
-      exports: Wasm.instance.exports,
-      withMappingCallback: (mappingCallback, f) => {
-        callbackStack.push(mappingCallback);
-        try {
-          f();
-        } finally {
-          callbackStack.pop();
-        }
-      }
-    };
-  }).then(null, e => {
-    cachedWasm = null;
-    throw e;
-  });
+    })
+    .then(Wasm => {
+      return {
+        exports: Wasm.instance.exports,
+        withMappingCallback: (mappingCallback, f) => {
+          callbackStack.push(mappingCallback);
+          try {
+            f();
+          } finally {
+            callbackStack.pop();
+          }
+        },
+      };
+    })
+    .then(null, e => {
+      cachedWasm = null;
+      throw e;
+    });
 
   return cachedWasm;
 };

package.json

 {
   "name": "source-map",
   "description": "Generates and consumes source maps",
-  "version": "0.8.0-beta.0",
+  "version": "0.8.0",
   "homepage": "https://github.com/mozilla/source-map",
@@ -47,3 +47,3 @@ "author": "Nick Fitzgerald <[e-mail]>",
     "type": "git",
-    "url": "http://github.com/mozilla/source-map.git"
+    "url": "git+ssh://[e-mail]/mozilla/source-map.git"
   },
@@ -53,3 +53,2 @@ "main": "./source-map.js",
   "browser": {
-    "./lib/url.js": "./lib/url-browser.js",
     "./lib/read-wasm.js": "./lib/read-wasm-browser.js"
@@ -62,37 +61,22 @@ },
   ],
-  "publishConfig": {
-    "tag": "next"
-  },
   "engines": {
-    "node": ">= 8"
+    "node": ">= 12"
   },
   "license": "BSD-3-Clause",
   "scripts": {
-    "lint": "eslint *.js lib/ test/",
-    "prebuild": "npm run lint",
-    "test": "node test/run-tests.js",
-    "coverage": "nyc node test/run-tests.js",
-    "setup": "mkdir -p coverage && cp -n .waiting.html coverage/index.html || true",
-    "dev:live": "live-server --port=4103 --ignorePattern='(js|css|png)$' coverage",
-    "dev:watch": "watch 'npm run coverage' lib/ test/",
-    "predev": "npm run setup",
-    "dev": "npm-run-all -p --silent dev:*",
-    "clean": "rm -rf coverage .nyc_output",
-    "toc": "doctoc --title '## Table of Contents' README.md && doctoc --title '## Table of Contents' CONTRIBUTING.md"
+    "lint": "eslint --fix *.js lib/ test/ --ignore-pattern 'test/source-map-tests/**'",
+    "test": "git submodule update --init --recursive; node test/run-tests.js",
+    "coverage": "c8 --reporter=text --reporter=html npm test",
+    "prettier": "prettier --write .",
+    "clean": "rm -rf coverage",
+    "toc": "doctoc --github --notitle README.md CONTRIBUTING.md"
   },
   "devDependencies": {
-    "doctoc": "^1.3.1",
-    "eslint": "^4.19.1",
-    "live-server": "^1.2.0",
-    "npm-run-all": "^4.1.2",
-    "nyc": "^11.7.1",
-    "watch": "^1.0.2"
+    "c8": "^7.12.0",
+    "doctoc": "^2.2.1",
+    "eslint": "^8.24.0",
+    "eslint-config-prettier": "^8.5.0",
+    "prettier": "^2.7.1"
   },
-  "nyc": {
-    "reporter": "html"
-  },
-  "typings": "source-map",
-  "dependencies": {
-    "whatwg-url": "^7.0.0"
-  }
+  "dependencies": {}
 }

README.md

 # Source Map
 
-[![Build Status](https://travis-ci.org/mozilla/source-map.png?branch=master)](https://travis-ci.org/mozilla/source-map)
-
-[![Coverage Status](https://coveralls.io/repos/github/mozilla/source-map/badge.svg)](https://coveralls.io/github/mozilla/source-map)
-
 [![NPM](https://nodei.co/npm/source-map.png?downloads=true&downloadRank=true)](https://www.npmjs.com/package/source-map)
@@ -20,16 +16,17 @@
 
-    <script src="https://unpkg.com/source-map@0.7.3/dist/source-map.js"></script>
-    <script>
-        sourceMap.SourceMapConsumer.initialize({
-            "lib/mappings.wasm": "https://unpkg.com/source-map@0.7.3/lib/mappings.wasm"
-        });
-    </script>
+```html
+<script src="https://unpkg.com/source-map@0.7.3/dist/source-map.js"></script>
+<script>
+  sourceMap.SourceMapConsumer.initialize({
+    "lib/mappings.wasm": "https://unpkg.com/source-map@0.7.3/lib/mappings.wasm",
+  });
+</script>
+```
 
---------------------------------------------------------------------------------
+---
 
-<!-- `npm run toc` to regenerate the Table of Contents -->
+## Table of Contents
 
 <!-- START doctoc generated TOC please keep comment here to allow auto update -->
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
-## Table of Contents
 
@@ -83,11 +80,11 @@ - [Examples](#examples)
   version: 3,
-  file: 'min.js',
-  names: ['bar', 'baz', 'n'],
-  sources: ['one.js', 'two.js'],
-  sourceRoot: 'http://example.com/www/js/',
-  mappings: 'CAAC,IAAI,IAAM,SAAUA,GAClB,OAAOC,IAAID;CCDb,IAAI,IAAM,SAAUE,GAClB,OAAOA'
+  file: "min.js",
+  names: ["bar", "baz", "n"],
+  sources: ["one.js", "two.js"],
+  sourceRoot: "http://example.com/www/js/",
+  mappings:
+    "CAAC,IAAI,IAAM,SAAUA,GAClB,OAAOC,IAAID;CCDb,IAAI,IAAM,SAAUE,GAClB,OAAOA",
 };
 
 const whatever = await SourceMapConsumer.with(rawSourceMap, null, consumer => {
-
   console.log(consumer.sources);
@@ -97,6 +94,8 @@ // [ 'http://example.com/www/js/one.js',
 
-  console.log(consumer.originalPositionFor({
-    line: 2,
-    column: 28
-  }));
+  console.log(
+    consumer.originalPositionFor({
+      line: 2,
+      column: 28,
+    })
+  );
   // { source: 'http://example.com/www/js/two.js',
@@ -107,7 +106,9 @@ //   line: 2,
 
-  console.log(consumer.generatedPositionFor({
-    source: 'http://example.com/www/js/two.js',
-    line: 2,
-    column: 10
-  }));
+  console.log(
+    consumer.generatedPositionFor({
+      source: "http://example.com/www/js/two.js",
+      line: 2,
+      column: 10,
+    })
+  );
   // { line: 2, column: 28 }
@@ -133,19 +134,19 @@
   switch (ast.type) {
-  case 'BinaryExpression':
-    return new SourceNode(
-      ast.location.line,
-      ast.location.column,
-      ast.location.source,
-      [compile(ast.left), " + ", compile(ast.right)]
-    );
-  case 'Literal':
-    return new SourceNode(
-      ast.location.line,
-      ast.location.column,
-      ast.location.source,
-      String(ast.value)
-    );
-  // ...
-  default:
-    throw new Error("Bad AST");
+    case "BinaryExpression":
+      return new SourceNode(
+        ast.location.line,
+        ast.location.column,
+        ast.location.source,
+        [compile(ast.left), " + ", compile(ast.right)]
+      );
+    case "Literal":
+      return new SourceNode(
+        ast.location.line,
+        ast.location.column,
+        ast.location.source,
+        String(ast.value)
+      );
+    // ...
+    default:
+      throw new Error("Bad AST");
   }
@@ -155,5 +156,7 @@ }
 var ast = parse("40 + 2", "add.js");
-console.log(compile(ast).toStringWithSourceMap({
-  file: 'add.js'
-}));
+console.log(
+  compile(ast).toStringWithSourceMap({
+    file: "add.js",
+  })
+);
 // { code: '40 + 2',
@@ -167,3 +170,3 @@ //   map: [object SourceMapGenerator] }
 var map = new SourceMapGenerator({
-  file: "source-mapped.js"
+  file: "source-mapped.js",
 });
@@ -174,3 +177,3 @@
     line: 10,
-    column: 35
+    column: 35,
   },
@@ -180,5 +183,5 @@ source: "foo.js",
     line: 33,
-    column: 2
+    column: 2,
   },
-  name: "christopher"
+  name: "christopher",
 });
@@ -196,3 +199,3 @@
 // Node.js
-var sourceMap = require('source-map');
+var sourceMap = require("source-map");
 
@@ -220,3 +223,3 @@ // Browser builds
 
-* `"lib/mappings.wasm"`: A `String` containing the URL of the
+- `"lib/mappings.wasm"`: A `String` containing the URL of the
   `lib/mappings.wasm` file, or an `ArrayBuffer` with the contents of `lib/mappings.wasm`.
@@ -226,3 +229,3 @@
 sourceMap.SourceMapConsumer.initialize({
-  "lib/mappings.wasm": "https://example.com/source-map/lib/mappings.wasm"
+  "lib/mappings.wasm": "https://example.com/source-map/lib/mappings.wasm",
 });
@@ -237,17 +240,21 @@ ```
 
-* `version`: Which version of the source map spec this map is following.
+- `version`: Which version of the source map spec this map is following.
 
-* `sources`: An array of URLs to the original source files.
+- `sources`: An array of URLs to the original source files.
 
-* `names`: An array of identifiers which can be referenced by individual
+- `names`: An array of identifiers which can be referenced by individual
   mappings.
 
-* `sourceRoot`: Optional. The URL root from which all sources are relative.
+- `sourceRoot`: Optional. The URL root from which all sources are relative.
 
-* `sourcesContent`: Optional. An array of contents of the original source files.
+- `sourcesContent`: Optional. An array of contents of the original source files.
 
-* `mappings`: A string of base64 VLQs which contain the actual mappings.
+- `mappings`: A string of base64 VLQs which contain the actual mappings.
 
-* `file`: Optional. The generated filename this source map is associated with.
+- `file`: Optional. The generated filename this source map is associated with.
 
+- `x_google_ignoreList`: Optional. An additional extension field which is an array
+  of indices refering to urls in the sources array. This is used to identify third-party
+  sources, that the developer might want to avoid when debugging. [Read more](https://developer.chrome.com/articles/x-google-ignore-list/)
+
 The promise of the constructed souce map consumer is returned.
@@ -270,4 +277,3 @@
 Construct a new `SourceMapConsumer` from `rawSourceMap` and `sourceMapUrl`
-(see the `SourceMapConsumer` constructor for details. Then, invoke the `async
-function f(SourceMapConsumer) -> T` with the newly constructed consumer, wait
+(see the `SourceMapConsumer` constructor for details. Then, invoke the `async function f(SourceMapConsumer) -> T` with the newly constructed consumer, wait
 for `f` to complete, call `destroy` on the consumer, and return `f`'s return
@@ -317,3 +323,3 @@ value.
 // Before:
-consumer.allGeneratedPositionsFor({ line: 2, source: "foo.coffee" })
+consumer.allGeneratedPositionsFor({ line: 2, source: "foo.coffee" });
 // [ { line: 2,
@@ -329,3 +335,3 @@ //     column: 1 },
 // After:
-consumer.allGeneratedPositionsFor({ line: 2, source: "foo.coffee" })
+consumer.allGeneratedPositionsFor({ line: 2, source: "foo.coffee" });
 // [ { line: 2,
@@ -348,3 +354,3 @@ //     column: 1,
 
-* `line`: The line number in the generated source.  Line numbers in
+- `line`: The line number in the generated source. Line numbers in
   this library are 1-based (note that the underlying source map
@@ -354,9 +360,9 @@ specification uses 0-based line numbers -- this library handles the
 
-* `column`: The column number in the generated source.  Column numbers
+- `column`: The column number in the generated source. Column numbers
   in this library are 0-based.
 
-* `bias`: Either `SourceMapConsumer.GREATEST_LOWER_BOUND` or
+- `bias`: Either `SourceMapConsumer.GREATEST_LOWER_BOUND` or
   `SourceMapConsumer.LEAST_UPPER_BOUND`. Specifies whether to return the closest
   element that is smaller than or greater than the one we are searching for,
-  respectively, if the exact element cannot be found.  Defaults to
+  respectively, if the exact element cannot be found. Defaults to
   `SourceMapConsumer.GREATEST_LOWER_BOUND`.
@@ -366,15 +372,15 @@
 
-* `source`: The original source file, or null if this information is not
+- `source`: The original source file, or null if this information is not
   available.
 
-* `line`: The line number in the original source, or null if this information is
-  not available.  The line number is 1-based.
+- `line`: The line number in the original source, or null if this information is
+  not available. The line number is 1-based.
 
-* `column`: The column number in the original source, or null if this
-  information is not available.  The column number is 0-based.
+- `column`: The column number in the original source, or null if this
+  information is not available. The column number is 0-based.
 
-* `name`: The original identifier, or null if this information is not available.
+- `name`: The original identifier, or null if this information is not available.
 
 ```js
-consumer.originalPositionFor({ line: 2, column: 10 })
+consumer.originalPositionFor({ line: 2, column: 10 });
 // { source: 'foo.coffee',
@@ -385,3 +391,6 @@ //   line: 2,
 
-consumer.originalPositionFor({ line: 99999999999999999, column: 999999999999999 })
+consumer.originalPositionFor({
+  line: 99999999999999999,
+  column: 999999999999999,
+});
 // { source: null,
@@ -399,8 +408,8 @@ //   line: null,
 
-* `source`: The filename of the original source.
+- `source`: The filename of the original source.
 
-* `line`: The line number in the original source.  The line number is
+- `line`: The line number in the original source. The line number is
   1-based.
 
-* `column`: The column number in the original source.  The column
+- `column`: The column number in the original source. The column
   number is 0-based.
@@ -410,10 +419,10 @@
 
-* `line`: The line number in the generated source, or null.  The line
+- `line`: The line number in the generated source, or null. The line
   number is 1-based.
 
-* `column`: The column number in the generated source, or null.  The
+- `column`: The column number in the generated source, or null. The
   column number is 0-based.
 
 ```js
-consumer.generatedPositionFor({ source: "example.js", line: 2, column: 10 })
+consumer.generatedPositionFor({ source: "example.js", line: 2, column: 10 });
 // { line: 1,
@@ -434,8 +443,8 @@ //   column: 56 }
 
-* `source`: The filename of the original source.
+- `source`: The filename of the original source.
 
-* `line`: The line number in the original source.  The line number is
+- `line`: The line number in the original source. The line number is
   1-based.
 
-* `column`: Optional. The column number in the original source.  The
+- `column`: Optional. The column number in the original source. The
   column number is 0-based.
@@ -445,10 +454,10 @@
 
-* `line`: The line number in the generated source, or null.  The line
+- `line`: The line number in the generated source, or null. The line
   number is 1-based.
 
-* `column`: The column number in the generated source, or null.  The
+- `column`: The column number in the generated source, or null. The
   column number is 0-based.
 
 ```js
-consumer.allGeneratedpositionsfor({ line: 2, source: "foo.coffee" })
+consumer.allGeneratedPositionsFor({ line: 2, source: "foo.coffee" });
 // [ { line: 2,
@@ -491,6 +500,6 @@ //     column: 1 },
 ```js
-consumer.sources
+consumer.sources;
 // [ "my-cool-lib.clj" ]
 
-consumer.sourceContentFor("my-cool-lib.clj")
+consumer.sourceContentFor("my-cool-lib.clj");
 // "..."
@@ -510,10 +519,9 @@
 
-* `callback`: The function that is called with each mapping. Mappings have the
-  form `{ source, generatedLine, generatedColumn, originalLine, originalColumn,
-  name }`
+- `callback`: The function that is called with each mapping. Mappings have the
+  form `{ source, generatedLine, generatedColumn, originalLine, originalColumn, name }`.
 
-* `context`: Optional. If specified, this object will be the value of `this`
+- `context`: Optional. If specified, this object will be the value of `this`
   every time that `callback` is called.
 
-* `order`: Either `SourceMapConsumer.GENERATED_ORDER` or
+- `order`: Either `SourceMapConsumer.GENERATED_ORDER` or
   `SourceMapConsumer.ORIGINAL_ORDER`. Specifies whether you want to iterate over
@@ -525,3 +533,5 @@ the mappings sorted by the generated file's line/column order or the
 ```js
-consumer.eachMapping(function (m) { console.log(m); })
+consumer.eachMapping(function (m) {
+  console.log(m);
+});
 // ...
@@ -542,2 +552,3 @@ // { source: 'illmatic.js',
 ```
+
 ### SourceMapGenerator
@@ -552,8 +563,8 @@
 
-* `file`: The filename of the generated source that this source map is
+- `file`: The filename of the generated source that this source map is
   associated with.
 
-* `sourceRoot`: A root for all relative URLs in this source map.
+- `sourceRoot`: A root for all relative URLs in this source map.
 
-* `skipValidation`: Optional. When `true`, disables validation of mappings as
+- `skipValidation`: Optional. When `true`, disables validation of mappings as
   they are added. This can improve performance but should be used with
@@ -566,3 +577,3 @@ discretion, as a last resort. Even then, one should avoid using this flag when
   file: "my-generated-javascript-file.js",
-  sourceRoot: "http://example.com/app/js/"
+  sourceRoot: "http://example.com/app/js/",
 });
@@ -575,3 +586,3 @@ ```
 
-* `sourceMapConsumer` The SourceMap.
+- `sourceMapConsumer` The SourceMap.
 
@@ -588,9 +599,9 @@ ```js
 
-* `generated`: An object with the generated line and column positions.
+- `generated`: An object with the generated line and column positions.
 
-* `original`: An object with the original line and column positions.
+- `original`: An object with the original line and column positions.
 
-* `source`: The original source file (relative to the sourceRoot).
+- `source`: The original source file (relative to the sourceRoot).
 
-* `name`: An optional original token name for this mapping.
+- `name`: An optional original token name for this mapping.
 
@@ -601,4 +612,4 @@ ```js
   original: { line: 128, column: 0 },
-  generated: { line: 3, column: 456 }
-})
+  generated: { line: 3, column: 456 },
+});
 ```
@@ -610,9 +621,11 @@
 
-* `sourceFile` the URL of the original source file.
+- `sourceFile` the URL of the original source file.
 
-* `sourceContent` the content of the source file.
+- `sourceContent` the content of the source file.
 
 ```js
-generator.setSourceContent("module-one.scm",
-                           fs.readFileSync("path/to/module-one.scm"))
+generator.setSourceContent(
+  "module-one.scm",
+  fs.readFileSync("path/to/module-one.scm")
+);
 ```
@@ -627,9 +640,9 @@
 
-* `sourceMapConsumer`: The SourceMap to be applied.
+- `sourceMapConsumer`: The SourceMap to be applied.
 
-* `sourceFile`: Optional. The filename of the source file.
+- `sourceFile`: Optional. The filename of the source file.
   If omitted, sourceMapConsumer.file will be used, if it exists.
   Otherwise an error will be thrown.
 
-* `sourceMapPath`: Optional. The dirname of the path to the SourceMap
+- `sourceMapPath`: Optional. The dirname of the path to the SourceMap
   to be applied. If relative, it is relative to the SourceMap.
@@ -650,3 +663,3 @@
 ```js
-generator.toString()
+generator.toString();
 // '{"version":3,"sources":["module-one.scm"],"names":[],"mappings":"...snip...","file":"my-generated-javascript-file.js","sourceRoot":"http://example.com/app/js/"}'
@@ -665,15 +678,15 @@ ```
 
-* `line`: The original line number associated with this source node, or null if
-  it isn't associated with an original line.  The line number is 1-based.
+- `line`: The original line number associated with this source node, or null if
+  it isn't associated with an original line. The line number is 1-based.
 
-* `column`: The original column number associated with this source node, or null
-  if it isn't associated with an original column.  The column number
+- `column`: The original column number associated with this source node, or null
+  if it isn't associated with an original column. The column number
   is 0-based.
 
-* `source`: The original source's filename; null if no filename is provided.
+- `source`: The original source's filename; null if no filename is provided.
 
-* `chunk`: Optional. Is immediately passed to `SourceNode.prototype.add`, see
+- `chunk`: Optional. Is immediately passed to `SourceNode.prototype.add`, see
   below.
 
-* `name`: Optional. The original identifier.
+- `name`: Optional. The original identifier.
 
@@ -692,12 +705,17 @@ ```js
 
-* `code`: The generated code
+- `code`: The generated code.
 
-* `sourceMapConsumer` The SourceMap for the generated code
+- `sourceMapConsumer` The SourceMap for the generated code.
 
-* `relativePath` The optional path that relative sources in `sourceMapConsumer`
+- `relativePath` The optional path that relative sources in `sourceMapConsumer`
   should be relative to.
 
 ```js
-const consumer = await new SourceMapConsumer(fs.readFileSync("path/to/my-file.js.map", "utf8"));
-const node = SourceNode.fromStringWithSourceMap(fs.readFileSync("path/to/my-file.js"), consumer);
+const consumer = await new SourceMapConsumer(
+  fs.readFileSync("path/to/my-file.js.map", "utf8")
+);
+const node = SourceNode.fromStringWithSourceMap(
+  fs.readFileSync("path/to/my-file.js"),
+  consumer
+);
 ```
@@ -709,4 +727,4 @@
 
-* `chunk`: A string snippet of generated JS code, another instance of
-   `SourceNode`, or an array where each member is one of those things.
+- `chunk`: A string snippet of generated JS code, another instance of
+  `SourceNode`, or an array where each member is one of those things.
 
@@ -723,4 +741,4 @@ ```js
 
-* `chunk`: A string snippet of generated JS code, another instance of
-   `SourceNode`, or an array where each member is one of those things.
+- `chunk`: A string snippet of generated JS code, another instance of
+  `SourceNode`, or an array where each member is one of those things.
 
@@ -736,9 +754,11 @@ ```js
 
-* `sourceFile`: The filename of the source file
+- `sourceFile`: The filename of the source file.
 
-* `sourceContent`: The content of the source file
+- `sourceContent`: The content of the source file.
 
 ```js
-node.setSourceContent("module-one.scm",
-                      fs.readFileSync("path/to/module-one.scm"))
+node.setSourceContent(
+  "module-one.scm",
+  fs.readFileSync("path/to/module-one.scm")
+);
 ```
@@ -752,3 +772,3 @@
 
-* `fn`: The traversal function.
+- `fn`: The traversal function.
 
@@ -759,9 +779,8 @@ ```js
   "dos",
-  [
-    "tres",
-    new SourceNode(5, 6, "c.js", "quatro")
-  ]
+  ["tres", new SourceNode(5, 6, "c.js", "quatro")],
 ]);
 
-node.walk(function (code, loc) { console.log("WALK:", code, loc); })
+node.walk(function (code, loc) {
+  console.log("WALK:", code, loc);
+});
 // WALK: uno { source: 'b.js', line: 3, column: 4, name: null }
@@ -778,3 +797,3 @@ // WALK: dos { source: 'a.js', line: 1, column: 2, name: null }
 
-* `fn`: The traversal function.
+- `fn`: The traversal function.
 
@@ -790,3 +809,5 @@ ```js
 var node = new SourceNode(null, null, null, [a, b, c]);
-node.walkSourceContents(function (source, contents) { console.log("WALK:", source, ":", contents); })
+node.walkSourceContents(function (source, contents) {
+  console.log("WALK:", source, ":", contents);
+});
 // WALK: a.js : original a
@@ -802,3 +823,3 @@ // WALK: b.js : original b
 
-* `sep`: The separator.
+- `sep`: The separator.
 
@@ -810,3 +831,3 @@ ```js
 
-var node = new SourceNode(null, null, null, [ lhs, operand, rhs ]);
+var node = new SourceNode(null, null, null, [lhs, operand, rhs]);
 var joinedNode = node.join(" ");
@@ -820,5 +841,5 @@ ```
 
-* `pattern`: The pattern to replace.
+- `pattern`: The pattern to replace.
 
-* `replacement`: The thing to replace the pattern with.
+- `replacement`: The thing to replace the pattern with.
 
@@ -839,9 +860,6 @@ ```js
   "dos",
-  [
-    "tres",
-    new SourceNode(5, 6, "c.js", "quatro")
-  ]
+  ["tres", new SourceNode(5, 6, "c.js", "quatro")],
 ]);
 
-node.toString()
+node.toString();
 // 'unodostresquatro'
@@ -862,11 +880,8 @@ ```
   "dos",
-  [
-    "tres",
-    new SourceNode(5, 6, "c.js", "quatro")
-  ]
+  ["tres", new SourceNode(5, 6, "c.js", "quatro")],
 ]);
 
-node.toStringWithSourceMap({ file: "my-output-file.js" })
+node.toStringWithSourceMap({ file: "my-output-file.js" });
 // { code: 'unodostresquatro',
 //   map: [object SourceMapGenerator] }
 ```

source-map.d.ts

@@ -10,232 +10,280 @@ // Type definitions for source-map 0.7
 export interface StartOfSourceMap {
-    file?: string;
-    sourceRoot?: string;
-    skipValidation?: boolean;
+  file?: string;
+  sourceRoot?: string;
+  skipValidation?: boolean;
 }
 
 export interface RawSourceMap {
-    version: number;
-    sources: string[];
-    names: string[];
-    sourceRoot?: string;
-    sourcesContent?: string[];
-    mappings: string;
-    file: string;
+  version: number;
+  sources: string[];
+  names: string[];
+  sourceRoot?: string;
+  sourcesContent?: string[];
+  mappings: string;
+  file: string;
 }
 
 export interface RawIndexMap extends StartOfSourceMap {
-    version: number;
-    sections: RawSection[];
+  version: number;
+  sections: RawSection[];
 }
 
 export interface RawSection {
-    offset: Position;
-    map: RawSourceMap;
+  offset: Position;
+  map: RawSourceMap;
 }
 
 export interface Position {
-    line: number;
-    column: number;
+  line: number;
+  column: number;
 }
 
 export interface NullablePosition {
-    line: number | null;
-    column: number | null;
-    lastColumn: number | null;
+  line: number | null;
+  column: number | null;
+  lastColumn: number | null;
 }
 
 export interface MappedPosition {
-    source: string;
-    line: number;
-    column: number;
-    name?: string;
+  source: string;
+  line: number;
+  column: number;
+  name?: string;
 }
 
 export interface NullableMappedPosition {
-    source: string | null;
-    line: number | null;
-    column: number | null;
-    name: string | null;
+  source: string | null;
+  line: number | null;
+  column: number | null;
+  name: string | null;
 }
 
 export interface MappingItem {
-    source: string;
-    generatedLine: number;
-    generatedColumn: number;
-    originalLine: number;
-    originalColumn: number;
-    name: string;
+  source: string;
+  generatedLine: number;
+  generatedColumn: number;
+  lastGeneratedColumn: number | null;
+  originalLine: number;
+  originalColumn: number;
+  name: string;
 }
 
 export interface Mapping {
-    generated: Position;
-    original: Position;
-    source: string;
-    name?: string;
+  generated: Position;
+  original: Position;
+  source: string;
+  name?: string;
 }
 
 export interface CodeWithSourceMap {
-    code: string;
-    map: SourceMapGenerator;
+  code: string;
+  map: SourceMapGenerator;
 }
 
+export interface SourceMappings {
+  "lib/mappings.wasm": SourceMapUrl | ArrayBuffer;
+}
+
 export interface SourceMapConsumer {
-    /**
-     * Compute the last column for each generated mapping. The last column is
-     * inclusive.
-     */
-    computeColumnSpans(): void;
+  /**
+   * Compute the last column for each generated mapping. The last column is
+   * inclusive.
+   */
+  computeColumnSpans(): void;
 
-    /**
-     * Returns the original source, line, and column information for the generated
-     * source's line and column positions provided. The only argument is an object
-     * with the following properties:
-     *
-     *   - line: The line number in the generated source.
-     *   - column: The column number in the generated source.
-     *   - bias: Either 'SourceMapConsumer.GREATEST_LOWER_BOUND' or
-     *     'SourceMapConsumer.LEAST_UPPER_BOUND'. Specifies whether to return the
-     *     closest element that is smaller than or greater than the one we are
-     *     searching for, respectively, if the exact element cannot be found.
-     *     Defaults to 'SourceMapConsumer.GREATEST_LOWER_BOUND'.
-     *
-     * and an object is returned with the following properties:
-     *
-     *   - source: The original source file, or null.
-     *   - line: The line number in the original source, or null.
-     *   - column: The column number in the original source, or null.
-     *   - name: The original identifier, or null.
-     */
-    originalPositionFor(generatedPosition: Position & { bias?: number }): NullableMappedPosition;
+  /**
+   * Returns the original source, line, and column information for the generated
+   * source's line and column positions provided. The only argument is an object
+   * with the following properties:
+   *
+   *   - line: The line number in the generated source.
+   *   - column: The column number in the generated source.
+   *   - bias: Either 'SourceMapConsumer.GREATEST_LOWER_BOUND' or
+   *     'SourceMapConsumer.LEAST_UPPER_BOUND'. Specifies whether to return the
+   *     closest element that is smaller than or greater than the one we are
+   *     searching for, respectively, if the exact element cannot be found.
+   *     Defaults to 'SourceMapConsumer.GREATEST_LOWER_BOUND'.
+   *
+   * and an object is returned with the following properties:
+   *
+   *   - source: The original source file, or null.
+   *   - line: The line number in the original source, or null.
+   *   - column: The column number in the original source, or null.
+   *   - name: The original identifier, or null.
+   */
+  originalPositionFor(
+    generatedPosition: Position & { bias?: number }
+  ): NullableMappedPosition;
 
-    /**
-     * Returns the generated line and column information for the original source,
-     * line, and column positions provided. The only argument is an object with
-     * the following properties:
-     *
-     *   - source: The filename of the original source.
-     *   - line: The line number in the original source.
-     *   - column: The column number in the original source.
-     *   - bias: Either 'SourceMapConsumer.GREATEST_LOWER_BOUND' or
-     *     'SourceMapConsumer.LEAST_UPPER_BOUND'. Specifies whether to return the
-     *     closest element that is smaller than or greater than the one we are
-     *     searching for, respectively, if the exact element cannot be found.
-     *     Defaults to 'SourceMapConsumer.GREATEST_LOWER_BOUND'.
-     *
-     * and an object is returned with the following properties:
-     *
-     *   - line: The line number in the generated source, or null.
-     *   - column: The column number in the generated source, or null.
-     */
-    generatedPositionFor(originalPosition: MappedPosition & { bias?: number }): NullablePosition;
+  /**
+   * Returns the generated line and column information for the original source,
+   * line, and column positions provided. The only argument is an object with
+   * the following properties:
+   *
+   *   - source: The filename of the original source.
+   *   - line: The line number in the original source.
+   *   - column: The column number in the original source.
+   *   - bias: Either 'SourceMapConsumer.GREATEST_LOWER_BOUND' or
+   *     'SourceMapConsumer.LEAST_UPPER_BOUND'. Specifies whether to return the
+   *     closest element that is smaller than or greater than the one we are
+   *     searching for, respectively, if the exact element cannot be found.
+   *     Defaults to 'SourceMapConsumer.GREATEST_LOWER_BOUND'.
+   *
+   * and an object is returned with the following properties:
+   *
+   *   - line: The line number in the generated source, or null.
+   *   - column: The column number in the generated source, or null.
+   */
+  generatedPositionFor(
+    originalPosition: MappedPosition & { bias?: number }
+  ): NullablePosition;
 
-    /**
-     * Returns all generated line and column information for the original source,
-     * line, and column provided. If no column is provided, returns all mappings
-     * corresponding to a either the line we are searching for or the next
-     * closest line that has any mappings. Otherwise, returns all mappings
-     * corresponding to the given line and either the column we are searching for
-     * or the next closest column that has any offsets.
-     *
-     * The only argument is an object with the following properties:
-     *
-     *   - source: The filename of the original source.
-     *   - line: The line number in the original source.
-     *   - column: Optional. the column number in the original source.
-     *
-     * and an array of objects is returned, each with the following properties:
-     *
-     *   - line: The line number in the generated source, or null.
-     *   - column: The column number in the generated source, or null.
-     */
-    allGeneratedPositionsFor(originalPosition: MappedPosition): NullablePosition[];
+  /**
+   * Returns all generated line and column information for the original source,
+   * line, and column provided. If no column is provided, returns all mappings
+   * corresponding to a either the line we are searching for or the next
+   * closest line that has any mappings. Otherwise, returns all mappings
+   * corresponding to the given line and either the column we are searching for
+   * or the next closest column that has any offsets.
+   *
+   * The only argument is an object with the following properties:
+   *
+   *   - source: The filename of the original source.
+   *   - line: The line number in the original source.
+   *   - column: Optional. the column number in the original source.
+   *
+   * and an array of objects is returned, each with the following properties:
+   *
+   *   - line: The line number in the generated source, or null.
+   *   - column: The column number in the generated source, or null.
+   */
+  allGeneratedPositionsFor(
+    originalPosition: MappedPosition
+  ): NullablePosition[];
 
-    /**
-     * Return true if we have the source content for every source in the source
-     * map, false otherwise.
-     */
-    hasContentsOfAllSources(): boolean;
+  /**
+   * Return true if we have the source content for every source in the source
+   * map, false otherwise.
+   */
+  hasContentsOfAllSources(): boolean;
 
-    /**
-     * Returns the original source content. The only argument is the url of the
-     * original source file. Returns null if no original source content is
-     * available.
-     */
-    sourceContentFor(source: string, returnNullOnMissing?: boolean): string | null;
+  /**
+   * Returns the original source content. The only argument is the url of the
+   * original source file. Returns null if no original source content is
+   * available.
+   */
+  sourceContentFor(
+    source: string,
+    returnNullOnMissing?: boolean
+  ): string | null;
 
-    /**
-     * Iterate over each mapping between an original source/line/column and a
-     * generated line/column in this source map.
-     *
-     * @param callback
-     *        The function that is called with each mapping.
-     * @param context
-     *        Optional. If specified, this object will be the value of `this` every
-     *        time that `aCallback` is called.
-     * @param order
-     *        Either `SourceMapConsumer.GENERATED_ORDER` or
-     *        `SourceMapConsumer.ORIGINAL_ORDER`. Specifies whether you want to
-     *        iterate over the mappings sorted by the generated file's line/column
-     *        order or the original's source/line/column order, respectively. Defaults to
-     *        `SourceMapConsumer.GENERATED_ORDER`.
-     */
-    eachMapping(callback: (mapping: MappingItem) => void, context?: any, order?: number): void;
-    /**
-     * Free this source map consumer's associated wasm data that is manually-managed.
-     * Alternatively, you can use SourceMapConsumer.with to avoid needing to remember to call destroy.
-     */
-    destroy(): void;
+  /**
+   * Iterate over each mapping between an original source/line/column and a
+   * generated line/column in this source map.
+   *
+   * @param callback
+   *        The function that is called with each mapping.
+   * @param context
+   *        Optional. If specified, this object will be the value of `this` every
+   *        time that `aCallback` is called.
+   * @param order
+   *        Either `SourceMapConsumer.GENERATED_ORDER` or
+   *        `SourceMapConsumer.ORIGINAL_ORDER`. Specifies whether you want to
+   *        iterate over the mappings sorted by the generated file's line/column
+   *        order or the original's source/line/column order, respectively. Defaults to
+   *        `SourceMapConsumer.GENERATED_ORDER`.
+   */
+  eachMapping(
+    callback: (mapping: MappingItem) => void,
+    context?: any,
+    order?: number
+  ): void;
+  /**
+   * Free this source map consumer's associated wasm data that is manually-managed.
+   * Alternatively, you can use SourceMapConsumer.with to avoid needing to remember to call destroy.
+   */
+  destroy(): void;
 }
 
 export interface SourceMapConsumerConstructor {
-    prototype: SourceMapConsumer;
+  prototype: SourceMapConsumer;
 
-    GENERATED_ORDER: number;
-    ORIGINAL_ORDER: number;
-    GREATEST_LOWER_BOUND: number;
-    LEAST_UPPER_BOUND: number;
+  GENERATED_ORDER: number;
+  ORIGINAL_ORDER: number;
+  GREATEST_LOWER_BOUND: number;
+  LEAST_UPPER_BOUND: number;
 
-    new (rawSourceMap: RawSourceMap, sourceMapUrl?: SourceMapUrl): Promise<BasicSourceMapConsumer>;
-    new (rawSourceMap: RawIndexMap, sourceMapUrl?: SourceMapUrl): Promise<IndexedSourceMapConsumer>;
-    new (rawSourceMap: RawSourceMap | RawIndexMap | string, sourceMapUrl?: SourceMapUrl): Promise<BasicSourceMapConsumer | IndexedSourceMapConsumer>;
+  new (
+    rawSourceMap: RawSourceMap,
+    sourceMapUrl?: SourceMapUrl
+  ): Promise<BasicSourceMapConsumer>;
+  new (
+    rawSourceMap: RawIndexMap,
+    sourceMapUrl?: SourceMapUrl
+  ): Promise<IndexedSourceMapConsumer>;
+  new (
+    rawSourceMap: RawSourceMap | RawIndexMap | string,
+    sourceMapUrl?: SourceMapUrl
+  ): Promise<BasicSourceMapConsumer | IndexedSourceMapConsumer>;
 
-    /**
-     * Create a BasicSourceMapConsumer from a SourceMapGenerator.
-     *
-     * @param sourceMap
-     *        The source map that will be consumed.
-     */
-    fromSourceMap(sourceMap: SourceMapGenerator, sourceMapUrl?: SourceMapUrl): Promise<BasicSourceMapConsumer>;
+  /**
+   * When using SourceMapConsumer outside of node.js, for example on the Web, it
+   * needs to know from what URL to load lib/mappings.wasm. You must inform it
+   * by calling initialize before constructing any SourceMapConsumers.
+   *
+   * @param mappings an object with the following property:
+   *   - "lib/mappings.wasm": A String containing the URL of the
+   *     lib/mappings.wasm file, or an ArrayBuffer with the contents of
+   *     lib/mappings.wasm.
+   */
+  initialize(mappings: SourceMappings): void;
 
-    /**
-     * Construct a new `SourceMapConsumer` from `rawSourceMap` and `sourceMapUrl`
-     * (see the `SourceMapConsumer` constructor for details. Then, invoke the `async
-     * function f(SourceMapConsumer) -> T` with the newly constructed consumer, wait
-     * for `f` to complete, call `destroy` on the consumer, and return `f`'s return
-     * value.
-     *
-     * You must not use the consumer after `f` completes!
-     *
-     * By using `with`, you do not have to remember to manually call `destroy` on
-     * the consumer, since it will be called automatically once `f` completes.
-     *
-     * ```js
-     * const xSquared = await SourceMapConsumer.with(
-     *   myRawSourceMap,
-     *   null,
-     *   async function (consumer) {
-     *     // Use `consumer` inside here and don't worry about remembering
-     *     // to call `destroy`.
-     *
-     *     const x = await whatever(consumer);
-     *     return x * x;
-     *   }
-     * );
-     *
-     * // You may not use that `consumer` anymore out here; it has
-     * // been destroyed. But you can use `xSquared`.
-     * console.log(xSquared);
-     * ```
-     */
-    with<T>(rawSourceMap: RawSourceMap | RawIndexMap | string, sourceMapUrl: SourceMapUrl | null | undefined, callback: (consumer: BasicSourceMapConsumer | IndexedSourceMapConsumer) => Promise<T> | T): Promise<T>;
+  /**
+   * Create a BasicSourceMapConsumer from a SourceMapGenerator.
+   *
+   * @param sourceMap
+   *        The source map that will be consumed.
+   */
+  fromSourceMap(
+    sourceMap: SourceMapGenerator,
+    sourceMapUrl?: SourceMapUrl
+  ): Promise<BasicSourceMapConsumer>;
+
+  /**
+   * Construct a new `SourceMapConsumer` from `rawSourceMap` and `sourceMapUrl`
+   * (see the `SourceMapConsumer` constructor for details. Then, invoke the `async
+   * function f(SourceMapConsumer) -> T` with the newly constructed consumer, wait
+   * for `f` to complete, call `destroy` on the consumer, and return `f`'s return
+   * value.
+   *
+   * You must not use the consumer after `f` completes!
+   *
+   * By using `with`, you do not have to remember to manually call `destroy` on
+   * the consumer, since it will be called automatically once `f` completes.
+   *
+   * ```js
+   * const xSquared = await SourceMapConsumer.with(
+   *   myRawSourceMap,
+   *   null,
+   *   async function (consumer) {
+   *     // Use `consumer` inside here and don't worry about remembering
+   *     // to call `destroy`.
+   *
+   *     const x = await whatever(consumer);
+   *     return x * x;
+   *   }
+   * );
+   *
+   * // You may not use that `consumer` anymore out here; it has
+   * // been destroyed. But you can use `xSquared`.
+   * console.log(xSquared);
+   * ```
+   */
+  with<T>(
+    rawSourceMap: RawSourceMap | RawIndexMap | string,
+    sourceMapUrl: SourceMapUrl | null | undefined,
+    callback: (
+      consumer: BasicSourceMapConsumer | IndexedSourceMapConsumer
+    ) => Promise<T> | T
+  ): Promise<T>;
 }
@@ -246,20 +294,20 @@
 export interface BasicSourceMapConsumer extends SourceMapConsumer {
-    file: string;
-    sourceRoot: string;
-    sources: string[];
-    sourcesContent: string[];
+  file: string;
+  sourceRoot: string;
+  sources: string[];
+  sourcesContent: string[];
 }
 
 export interface BasicSourceMapConsumerConstructor {
-    prototype: BasicSourceMapConsumer;
+  prototype: BasicSourceMapConsumer;
 
-    new (rawSourceMap: RawSourceMap | string): Promise<BasicSourceMapConsumer>;
+  new (rawSourceMap: RawSourceMap | string): Promise<BasicSourceMapConsumer>;
 
-    /**
-     * Create a BasicSourceMapConsumer from a SourceMapGenerator.
-     *
-     * @param sourceMap
-     *        The source map that will be consumed.
-     */
-    fromSourceMap(sourceMap: SourceMapGenerator): Promise<BasicSourceMapConsumer>;
+  /**
+   * Create a BasicSourceMapConsumer from a SourceMapGenerator.
+   *
+   * @param sourceMap
+   *        The source map that will be consumed.
+   */
+  fromSourceMap(sourceMap: SourceMapGenerator): Promise<BasicSourceMapConsumer>;
 }
@@ -270,9 +318,9 @@
 export interface IndexedSourceMapConsumer extends SourceMapConsumer {
-    sources: string[];
+  sources: string[];
 }
 
 export interface IndexedSourceMapConsumerConstructor {
-    prototype: IndexedSourceMapConsumer;
+  prototype: IndexedSourceMapConsumer;
 
-    new (rawSourceMap: RawIndexMap | string): Promise<IndexedSourceMapConsumer>;
+  new (rawSourceMap: RawIndexMap | string): Promise<IndexedSourceMapConsumer>;
 }
@@ -283,91 +331,97 @@
 export class SourceMapGenerator {
-    constructor(startOfSourceMap?: StartOfSourceMap);
+  constructor(startOfSourceMap?: StartOfSourceMap);
 
-    /**
-     * Creates a new SourceMapGenerator based on a SourceMapConsumer
-     *
-     * @param sourceMapConsumer The SourceMap.
-     */
-    static fromSourceMap(sourceMapConsumer: SourceMapConsumer): SourceMapGenerator;
+  /**
+   * Creates a new SourceMapGenerator based on a SourceMapConsumer
+   *
+   * @param sourceMapConsumer The SourceMap.
+   */
+  static fromSourceMap(
+    sourceMapConsumer: SourceMapConsumer
+  ): SourceMapGenerator;
 
-    /**
-     * Add a single mapping from original source line and column to the generated
-     * source's line and column for this source map being created. The mapping
-     * object should have the following properties:
-     *
-     *   - generated: An object with the generated line and column positions.
-     *   - original: An object with the original line and column positions.
-     *   - source: The original source file (relative to the sourceRoot).
-     *   - name: An optional original token name for this mapping.
-     */
-    addMapping(mapping: Mapping): void;
+  /**
+   * Add a single mapping from original source line and column to the generated
+   * source's line and column for this source map being created. The mapping
+   * object should have the following properties:
+   *
+   *   - generated: An object with the generated line and column positions.
+   *   - original: An object with the original line and column positions.
+   *   - source: The original source file (relative to the sourceRoot).
+   *   - name: An optional original token name for this mapping.
+   */
+  addMapping(mapping: Mapping): void;
 
-    /**
-     * Set the source content for a source file.
-     */
-    setSourceContent(sourceFile: string, sourceContent: string): void;
+  /**
+   * Set the source content for a source file.
+   */
+  setSourceContent(sourceFile: string, sourceContent: string): void;
 
-    /**
-     * Applies the mappings of a sub-source-map for a specific source file to the
-     * source map being generated. Each mapping to the supplied source file is
-     * rewritten using the supplied source map. Note: The resolution for the
-     * resulting mappings is the minimium of this map and the supplied map.
-     *
-     * @param sourceMapConsumer The source map to be applied.
-     * @param sourceFile Optional. The filename of the source file.
-     *        If omitted, SourceMapConsumer's file property will be used.
-     * @param sourceMapPath Optional. The dirname of the path to the source map
-     *        to be applied. If relative, it is relative to the SourceMapConsumer.
-     *        This parameter is needed when the two source maps aren't in the same
-     *        directory, and the source map to be applied contains relative source
-     *        paths. If so, those relative source paths need to be rewritten
-     *        relative to the SourceMapGenerator.
-     */
-    applySourceMap(sourceMapConsumer: SourceMapConsumer, sourceFile?: string, sourceMapPath?: string): void;
+  /**
+   * Applies the mappings of a sub-source-map for a specific source file to the
+   * source map being generated. Each mapping to the supplied source file is
+   * rewritten using the supplied source map. Note: The resolution for the
+   * resulting mappings is the minimium of this map and the supplied map.
+   *
+   * @param sourceMapConsumer The source map to be applied.
+   * @param sourceFile Optional. The filename of the source file.
+   *        If omitted, SourceMapConsumer's file property will be used.
+   * @param sourceMapPath Optional. The dirname of the path to the source map
+   *        to be applied. If relative, it is relative to the SourceMapConsumer.
+   *        This parameter is needed when the two source maps aren't in the same
+   *        directory, and the source map to be applied contains relative source
+   *        paths. If so, those relative source paths need to be rewritten
+   *        relative to the SourceMapGenerator.
+   */
+  applySourceMap(
+    sourceMapConsumer: SourceMapConsumer,
+    sourceFile?: string,
+    sourceMapPath?: string
+  ): void;
 
-    toString(): string;
+  toString(): string;
 
-    toJSON(): RawSourceMap;
+  toJSON(): RawSourceMap;
 }
 
 export class SourceNode {
-    children: SourceNode[];
-    sourceContents: any;
-    line: number;
-    column: number;
-    source: string;
-    name: string;
+  children: SourceNode[];
+  sourceContents: any;
+  line: number;
+  column: number;
+  source: string;
+  name: string;
 
-    constructor();
-    constructor(
-        line: number | null,
-        column: number | null,
-        source: string | null,
-        chunks?: Array<(string | SourceNode)> | SourceNode | string,
-        name?: string
-    );
+  constructor();
+  constructor(
+    line: number | null,
+    column: number | null,
+    source: string | null,
+    chunks?: Array<string | SourceNode> | SourceNode | string,
+    name?: string
+  );
 
-    static fromStringWithSourceMap(
-        code: string,
-        sourceMapConsumer: SourceMapConsumer,
-        relativePath?: string
-    ): SourceNode;
+  static fromStringWithSourceMap(
+    code: string,
+    sourceMapConsumer: SourceMapConsumer,
+    relativePath?: string
+  ): SourceNode;
 
-    add(chunk: Array<(string | SourceNode)> | SourceNode | string): SourceNode;
+  add(chunk: Array<string | SourceNode> | SourceNode | string): SourceNode;
 
-    prepend(chunk: Array<(string | SourceNode)> | SourceNode | string): SourceNode;
+  prepend(chunk: Array<string | SourceNode> | SourceNode | string): SourceNode;
 
-    setSourceContent(sourceFile: string, sourceContent: string): void;
+  setSourceContent(sourceFile: string, sourceContent: string): void;
 
-    walk(fn: (chunk: string, mapping: MappedPosition) => void): void;
+  walk(fn: (chunk: string, mapping: MappedPosition) => void): void;
 
-    walkSourceContents(fn: (file: string, content: string) => void): void;
+  walkSourceContents(fn: (file: string, content: string) => void): void;
 
-    join(sep: string): SourceNode;
+  join(sep: string): SourceNode;
 
-    replaceRight(pattern: string, replacement: string): SourceNode;
+  replaceRight(pattern: string, replacement: string): SourceNode;
 
-    toString(): string;
+  toString(): string;
 
-    toStringWithSourceMap(startOfSourceMap?: StartOfSourceMap): CodeWithSourceMap;
+  toStringWithSourceMap(startOfSourceMap?: StartOfSourceMap): CodeWithSourceMap;
 }

source-map.js

 /*
  * Copyright 2009-2011 Mozilla Foundation and contributors
- * Licensed under the New BSD license. See LICENSE.txt or:
+ * Licensed under the New BSD license. See LICENSE or:
  * http://opensource.org/licenses/BSD-3-Clause
  */
-exports.SourceMapGenerator = require("./lib/source-map-generator").SourceMapGenerator;
-exports.SourceMapConsumer = require("./lib/source-map-consumer").SourceMapConsumer;
+exports.SourceMapGenerator =
+  require("./lib/source-map-generator").SourceMapGenerator;
+exports.SourceMapConsumer =
+  require("./lib/source-map-consumer").SourceMapConsumer;
 exports.SourceNode = require("./lib/source-node").SourceNode;

CHANGELOG.md

-# Change Log
-
-## 0.8.0-beta.0
-
-### Breaking changes
-
-* [#350](https://github.com/mozilla/source-map/pull/350) -
-  Change browser detection logic for WASM loading.
-* [#363](https://github.com/mozilla/source-map/pull/363) -
-  Change WASM loading detection to rely on `package.json#browser` field.
-* [#362](https://github.com/mozilla/source-map/pull/362) -
-  Remove the `dist/` bundle.
-* [#371](https://github.com/mozilla/source-map/pull/371) -
-  Reimplement sourcemap URL processing using the WHATWG URL API.
-
-### Nonbreaking changes:
-
-* [#339](https://github.com/mozilla/source-map/pull/339) -
-  Allow initializing the consumer `mappings.wasm` file as an `ArrayBuffer`.
-
-### Internal Improvements:
-
-* [#347](https://github.com/mozilla/source-map/pull/347) -
-  Improve tests.
-* [#352](https://github.com/mozilla/source-map/pull/352) -
-  Improve documentation.
-* [#361](https://github.com/mozilla/source-map/pull/361) -
-  Use newer Webpack CLI when bundling.
-* [#364](https://github.com/mozilla/source-map/pull/364) -
-  Convert `IndexedSourceMapConsumer` implementation to pass more through
-    to `BasicSourceMapConsumer`.
-* [#366](https://github.com/mozilla/source-map/pull/366) -
-  Normalize internal URL representation to be easier to follow.
-* [#341](https://github.com/mozilla/source-map/pull/341) -
-  Use async functions to simplify `SourceMapConsumer.with` implementation.
-
-
-## 0.7.3
-
-* Fix a bug where nested uses of `SourceMapConsumer` could result in a
-  `TypeError`. [#338](https://github.com/mozilla/source-map/issues/338)
-  [#330](https://github.com/mozilla/source-map/issues/330)
-  [#319](https://github.com/mozilla/source-map/issues/319)
-
-## 0.7.2
-
-* Another 3x speed up in `SourceMapConsumer`. Read about it here:
-  http://fitzgeraldnick.com/2018/02/26/speed-without-wizardry.html
-
-## 0.7.1
-
-* Updated TypeScript typings. [#321][]
-
-[#321]: https://github.com/mozilla/source-map/pull/321
-
-## 0.7.0
-
-* `SourceMapConsumer` now uses WebAssembly, and is **much** faster! Read about
-  it here:
-  https://hacks.mozilla.org/2018/01/oxidizing-source-maps-with-rust-and-webassembly/
-
-* **Breaking change:** `new SourceMapConsumer` now returns a `Promise` object
-  that resolves to the newly constructed `SourceMapConsumer` instance, rather
-  than returning the new instance immediately.
-
-* **Breaking change:** when you're done using a `SourceMapConsumer` instance,
-  you must call `SourceMapConsumer.prototype.destroy` on it. After calling
-  `destroy`, you must not use the instance again.
-
-* **Breaking change:** `SourceMapConsumer` used to be able to handle lines,
-  columns numbers and source and name indices up to `2^53 - 1` (aka
-  `Number.MAX_SAFE_INTEGER`). It can now only handle them up to `2^32 - 1`.
-
-* **Breaking change:** The `source-map` library now uses modern ECMAScript-isms:
-  `let`, arrow functions, `async`, etc. Use Babel to compile it down to
-  ECMAScript 5 if you need to support older JavaScript environments.
-
-* **Breaking change:** Drop support for Node < 8. If you want to support older
-versions of node, please use v0.6 or below.
-
-## 0.5.6
-
-* Fix for regression when people were using numbers as names in source maps. See
-  #236.
-
-## 0.5.5
-
-* Fix "regression" of unsupported, implementation behavior that half the world
-  happens to have come to depend on. See #235.
-
-* Fix regression involving function hoisting in SpiderMonkey. See #233.
-
-## 0.5.4
-
-* Large performance improvements to source-map serialization. See #228 and #229.
-
-## 0.5.3
-
-* Do not include unnecessary distribution files. See
-  commit ef7006f8d1647e0a83fdc60f04f5a7ca54886f86.
-
-## 0.5.2
-
-* Include browser distributions of the library in package.json's `files`. See
-  issue #212.
-
-## 0.5.1
-
-* Fix latent bugs in IndexedSourceMapConsumer.prototype._parseMappings. See
-  ff05274becc9e6e1295ed60f3ea090d31d843379.
-
-## 0.5.0
-
-* Node 0.8 is no longer supported.
-
-* Use webpack instead of dryice for bundling.
-
-* Big speedups serializing source maps. See pull request #203.
-
-* Fix a bug with `SourceMapConsumer.prototype.sourceContentFor` and sources that
-  explicitly start with the source root. See issue #199.
-
-## 0.4.4
-
-* Fix an issue where using a `SourceMapGenerator` after having created a
-  `SourceMapConsumer` from it via `SourceMapConsumer.fromSourceMap` failed. See
-  issue #191.
-
-* Fix an issue with where `SourceMapGenerator` would mistakenly consider
-  different mappings as duplicates of each other and avoid generating them. See
-  issue #192.
-
-## 0.4.3
-
-* A very large number of performance improvements, particularly when parsing
-  source maps. Collectively about 75% of time shaved off of the source map
-  parsing benchmark!
-
-* Fix a bug in `SourceMapConsumer.prototype.allGeneratedPositionsFor` and fuzzy
-  searching in the presence of a column option. See issue #177.
-
-* Fix a bug with joining a source and its source root when the source is above
-  the root. See issue #182.
-
-* Add the `SourceMapConsumer.prototype.hasContentsOfAllSources` method to
-  determine when all sources' contents are inlined into the source map. See
-  issue #190.
-
-## 0.4.2
-
-* Add an `.npmignore` file so that the benchmarks aren't pulled down by
-  dependent projects. Issue #169.
-
-* Add an optional `column` argument to
-  `SourceMapConsumer.prototype.allGeneratedPositionsFor` and better handle lines
-  with no mappings. Issues #172 and #173.
-
-## 0.4.1
-
-* Fix accidentally defining a global variable. #170.
-
-## 0.4.0
-
-* The default direction for fuzzy searching was changed back to its original
-  direction. See #164.
-
-* There is now a `bias` option you can supply to `SourceMapConsumer` to control
-  the fuzzy searching direction. See #167.
-
-* About an 8% speed up in parsing source maps. See #159.
-
-* Added a benchmark for parsing and generating source maps.
-
-## 0.3.0
-
-* Change the default direction that searching for positions fuzzes when there is
-  not an exact match. See #154.
-
-* Support for environments using json2.js for JSON serialization. See #156.
-
-## 0.2.0
-
-* Support for consuming "indexed" source maps which do not have any remote
-  sections. See pull request #127. This introduces a minor backwards
-  incompatibility if you are monkey patching `SourceMapConsumer.prototype`
-  methods.
-
-## 0.1.43
-
-* Performance improvements for `SourceMapGenerator` and `SourceNode`. See issue
-  #148 for some discussion and issues #150, #151, and #152 for implementations.
-
-## 0.1.42
-
-* Fix an issue where `SourceNode`s from different versions of the source-map
-  library couldn't be used in conjunction with each other. See issue #142.
-
-## 0.1.41
-
-* Fix a bug with getting the source content of relative sources with a "./"
-  prefix. See issue #145 and [Bug 1090768](bugzil.la/1090768).
-
-* Add the `SourceMapConsumer.prototype.computeColumnSpans` method to compute the
-  column span of each mapping.
-
-* Add the `SourceMapConsumer.prototype.allGeneratedPositionsFor` method to find
-  all generated positions associated with a given original source and line.
-
-## 0.1.40
-
-* Performance improvements for parsing source maps in SourceMapConsumer.
-
-## 0.1.39
-
-* Fix a bug where setting a source's contents to null before any source content
-  had been set before threw a TypeError. See issue #131.
-
-## 0.1.38
-
-* Fix a bug where finding relative paths from an empty path were creating
-  absolute paths. See issue #129.
-
-## 0.1.37
-
-* Fix a bug where if the source root was an empty string, relative source paths
-  would turn into absolute source paths. Issue #124.
-
-## 0.1.36
-
-* Allow the `names` mapping property to be an empty string. Issue #121.
-
-## 0.1.35
-
-* A third optional parameter was added to `SourceNode.fromStringWithSourceMap`
-  to specify a path that relative sources in the second parameter should be
-  relative to. Issue #105.
-
-* If no file property is given to a `SourceMapGenerator`, then the resulting
-  source map will no longer have a `null` file property. The property will
-  simply not exist. Issue #104.
-
-* Fixed a bug where consecutive newlines were ignored in `SourceNode`s.
-  Issue #116.
-
-## 0.1.34
-
-* Make `SourceNode` work with windows style ("\r\n") newlines. Issue #103.
-
-* Fix bug involving source contents and the
-  `SourceMapGenerator.prototype.applySourceMap`. Issue #100.
-
-## 0.1.33
-
-* Fix some edge cases surrounding path joining and URL resolution.
-
-* Add a third parameter for relative path to
-  `SourceMapGenerator.prototype.applySourceMap`.
-
-* Fix issues with mappings and EOLs.
-
-## 0.1.32
-
-* Fixed a bug where SourceMapConsumer couldn't handle negative relative columns
-  (issue 92).
-
-* Fixed test runner to actually report number of failed tests as its process
-  exit code.
-
-* Fixed a typo when reporting bad mappings (issue 87).
-
-## 0.1.31
-
-* Delay parsing the mappings in SourceMapConsumer until queried for a source
-  location.
-
-* Support Sass source maps (which at the time of writing deviate from the spec
-  in small ways) in SourceMapConsumer.
-
-## 0.1.30
-
-* Do not join source root with a source, when the source is a data URI.
-
-* Extend the test runner to allow running single specific test files at a time.
-
-* Performance improvements in `SourceNode.prototype.walk` and
-  `SourceMapConsumer.prototype.eachMapping`.
-
-* Source map browser builds will now work inside Workers.
-
-* Better error messages when attempting to add an invalid mapping to a
-  `SourceMapGenerator`.
-
-## 0.1.29
-
-* Allow duplicate entries in the `names` and `sources` arrays of source maps
-  (usually from TypeScript) we are parsing. Fixes github issue 72.
-
-## 0.1.28
-
-* Skip duplicate mappings when creating source maps from SourceNode; github
-  issue 75.
-
-## 0.1.27
-
-* Don't throw an error when the `file` property is missing in SourceMapConsumer,
-  we don't use it anyway.
-
-## 0.1.26
-
-* Fix SourceNode.fromStringWithSourceMap for empty maps. Fixes github issue 70.
-
-## 0.1.25
-
-* Make compatible with browserify
-
-## 0.1.24
-
-* Fix issue with absolute paths and `file://` URIs. See
-  https://bugzilla.mozilla.org/show_bug.cgi?id=885597
-
-## 0.1.23
-
-* Fix issue with absolute paths and sourcesContent, github issue 64.
-
-## 0.1.22
-
-* Ignore duplicate mappings in SourceMapGenerator. Fixes github issue 21.
-
-## 0.1.21
-
-* Fixed handling of sources that start with a slash so that they are relative to
-  the source root's host.
-
-## 0.1.20
-
-* Fixed github issue #43: absolute URLs aren't joined with the source root
-  anymore.
-
-## 0.1.19
-
-* Using Travis CI to run tests.
-
-## 0.1.18
-
-* Fixed a bug in the handling of sourceRoot.
-
-## 0.1.17
-
-* Added SourceNode.fromStringWithSourceMap.
-
-## 0.1.16
-
-* Added missing documentation.
-
-* Fixed the generating of empty mappings in SourceNode.
-
-## 0.1.15
-
-* Added SourceMapGenerator.applySourceMap.
-
-## 0.1.14
-
-* The sourceRoot is now handled consistently.
-
-## 0.1.13
-
-* Added SourceMapGenerator.fromSourceMap.
-
-## 0.1.12
-
-* SourceNode now generates empty mappings too.
-
-## 0.1.11
-
-* Added name support to SourceNode.
-
-## 0.1.10
-
-* Added sourcesContent support to the customer and generator.

lib/url-browser.js

-/* -*- Mode: js; js-indent-level: 2; -*- */
-/*
- * Copyright 2011 Mozilla Foundation and contributors
- * Licensed under the New BSD license. See LICENSE or:
- * http://opensource.org/licenses/BSD-3-Clause
- */
-"use strict";
-
-/**
- * Browser 'URL' implementations have been found to handle non-standard URL
- * schemes poorly, and schemes like
- *
- *   webpack:///src/folder/file.js
- *
- * are very common in source maps. For the time being we use a JS
- * implementation in these contexts instead. See
- *
- * * https://bugzilla.mozilla.org/show_bug.cgi?id=1374505
- * * https://bugs.chromium.org/p/chromium/issues/detail?id=734880
- */
-module.exports = require("whatwg-url").URL;

New alerts

Unstable ownership

Supply chain risk

A new collaborator has begun publishing package versions. Package stability and security risk may be elevated.

New author

Supply chain risk

A new npm collaborator published a version of the package for the first time. New collaborators are usually benign additions to a project, but do indicate a change to the security surface area of a package.

Fixed alerts

Deprecated

Maintenance

The maintainer of the package marked it as deprecated. This could indicate that a single version should not be used, or that the package is no longer maintained and any new vulnerabilities will not be fixed.

New author

Supply chain risk

A new npm collaborator published a version of the package for the first time. New collaborators are usually benign additions to a project, but do indicate a change to the security surface area of a package.

Improved metrics

Dependency count

0

-100%

Dev dependency count

5

-16.67%

Lines of code

3074

6.55%

Number of medium maintenance alerts

0

-100%

Number of lines in readme file

838

1.82%

Worsened metrics

Total package byte prevSize

185657

-5.6%

Number of package files

19

-9.52%

Number of high supply chain risk alerts

1

Infinity%

Dependency changes

• - Removed

  whatwg-url@^7.0.0

• - Removed

  lodash.sortby@4.7.0
  (transitive)

• - Removed

  punycode@2.3.1
  (transitive)

• - Removed

  tr46@1.0.1
  (transitive)

• - Removed

  webidl-conversions@4.0.2
  (transitive)

• - Removed

  whatwg-url@7.1.0
  (transitive)