babel-plugin-minify-constant-folding - npm Package Compare versions

Comparing version 0.3.0-alpha.37064b40 to 0.3.0-alpha.5ee3078e

lib/index.js

 "use strict";
 
-function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }
+const evaluate = require("babel-helper-evaluate-path");
 
-var evaluate = require("babel-helper-evaluate-path");
+var _require = require("./replacements");
 
-var _require = require("./replacements"),
-    FALLBACK_HANDLER = _require.FALLBACK_HANDLER;
+const FALLBACK_HANDLER = _require.FALLBACK_HANDLER;
 
+
 function getName(member) {
@@ -24,7 +24,7 @@ if (member.computed) {
 
-function swap(path, member, handlers) {
-  var key = getName(member.node);
+function swap(path, member, handlers, ...args) {
+  const key = getName(member.node);
   if (key === void 0) return false;
 
-  var handler = void 0;
+  let handler;
   if (hop(handlers, key) && typeof handlers[key] === "function") {
@@ -38,7 +38,3 @@ handler = handlers[key];
 
-  for (var _len = arguments.length, args = Array(_len > 3 ? _len - 3 : 0), _key = 3; _key < _len; _key++) {
-    args[_key - 3] = arguments[_key];
-  }
-
-  var replacement = handler.apply(member.get("object"), args);
+  const replacement = handler.apply(member.get("object"), args);
   if (replacement) {
@@ -51,7 +47,7 @@ path.replaceWith(replacement);
 
-module.exports = function (babel) {
-  var replacements = require("./replacements.js")(babel);
-  var seen = Symbol("seen");
-  var t = babel.types,
-      traverse = babel.traverse;
+module.exports = babel => {
+  const replacements = require("./replacements.js")(babel);
+  const seen = Symbol("seen");
+  const t = babel.types,
+        traverse = babel.traverse;
 
@@ -66,4 +62,3 @@
       BinaryExpression(path) {
-        var literal = void 0,
-            bin = void 0;
+        let literal, bin;
         if (path.get("right").isStringLiteral()) {
@@ -87,3 +82,3 @@ literal = path.get("right");
 
-        var relevant = getLeaf(bin, literal.key);
+        const relevant = getLeaf(bin, literal.key);
 
@@ -94,3 +89,3 @@ if (!relevant) {
 
-        var value = literal.key === "right" ? relevant.node.value + literal.node.value : literal.node.value + relevant.node.value;
+        const value = literal.key === "right" ? relevant.node.value + literal.node.value : literal.node.value + relevant.node.value;
 
@@ -110,8 +105,4 @@ relevant.replaceWith(t.stringLiteral(value));
       // TODO: look into evaluating binding too (could result in more code, but gzip?)
-      Expression(path, _ref) {
-        var _ref$opts = _ref.opts;
-        _ref$opts = _ref$opts === undefined ? {} : _ref$opts;
-        var _ref$opts$tdz = _ref$opts.tdz,
-            tdz = _ref$opts$tdz === undefined ? false : _ref$opts$tdz;
-        var node = path.node;
+      Expression(path, { opts: { tdz = false } = {} }) {
+        const node = path.node;
 
@@ -153,3 +144,3 @@
 
-        var res = evaluate(path, { tdz });
+        const res = evaluate(path, { tdz });
         if (res.confident) {
@@ -165,5 +156,5 @@ // Avoid fractions because they can be longer than the original expression.
             if (1 / res.value === -Infinity) {
-              var _node2 = t.unaryExpression("-", t.numericLiteral(0), true);
-              _node2[seen] = true;
-              path.replaceWith(_node2);
+              const node = t.unaryExpression("-", t.numericLiteral(0), true);
+              node[seen] = true;
+              path.replaceWith(node);
               return;
@@ -182,13 +173,13 @@ }
 
-          var _node = t.valueToNode(res.value);
-          _node[seen] = true;
-          path.replaceWith(_node);
+          const node = t.valueToNode(res.value);
+          node[seen] = true;
+          path.replaceWith(node);
         }
       },
       CallExpression(path) {
-        var node = path.node;
+        const node = path.node;
 
-        var member = path.get("callee");
+        const member = path.get("callee");
         if (t.isMemberExpression(member)) {
-          var helpers = replacements[member.node.object.type];
+          const helpers = replacements[member.node.object.type];
           if (!helpers || !helpers.calls) return;
@@ -199,9 +190,9 @@ // find if the input can be constant folded
           }
-          swap.apply(undefined, [path, member, helpers.calls].concat(_toConsumableArray(node.arguments)));
+          swap(path, member, helpers.calls, ...node.arguments);
         }
       },
       MemberExpression(path) {
-        var node = path.node;
+        const node = path.node;
 
-        var helpers = replacements[node.object.type];
+        const helpers = replacements[node.object.type];
         if (!helpers || !helpers.members) return;
@@ -208,0 +199,0 @@ swap(path, path, helpers.members);

lib/replacements.js

 "use strict";
 
-var FALLBACK_HANDLER = Symbol("fallback handler");
+const FALLBACK_HANDLER = Symbol("fallback handler");
 
-module.exports = function (_ref) {
-  var t = _ref.types;
+module.exports = ({ types: t }) => {
+  const undef = t.unaryExpression("void", t.numericLiteral(0));
 
-  var undef = t.unaryExpression("void", t.numericLiteral(0));
-
   function isUndef(ob) {
@@ -15,11 +13,5 @@ return ob === undefined || t.isIdentifier(ob, { name: "undefined" }) || t.isUnaryExpression(ob, { operator: "void" });
   function defaultZero(cb) {
-    return function () {
-      var i = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : t.numericLiteral(0);
-
+    return function (i = t.numericLiteral(0), ...args) {
       if (t.isNumericLiteral(i)) {
-        for (var _len = arguments.length, args = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
-          args[_key - 1] = arguments[_key];
-        }
-
-        return cb.call.apply(cb, [this.node, this.node, i.value].concat(args));
+        return cb.call(this.node, this.node, i.value, ...args);
       }
@@ -30,5 +22,3 @@ };
   function hasSpread(node) {
-    return node.elements.some(function (el) {
-      return t.isSpreadElement(el);
-    });
+    return node.elements.some(el => t.isSpreadElement(el));
   }
@@ -58,9 +48,7 @@
       calls: {
-        join() {
-          var sep = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : t.stringLiteral(",");
-
+        join(sep = t.stringLiteral(",")) {
           if (!t.isStringLiteral(sep)) return;
-          var bad = false;
-          var str = this.get("elements").map(function (el) {
-            var evaled = el.evaluate();
+          let bad = false;
+          const str = this.get("elements").map(el => {
+            const evaled = el.evaluate();
             if (!evaled.confident) {
@@ -74,4 +62,4 @@ bad = true;
         },
-        push() {
-          return t.numericLiteral(this.node.elements.length + arguments.length);
+        push(...args) {
+          return t.numericLiteral(this.node.elements.length + args.length);
         },
@@ -84,6 +72,3 @@ shift() {
         },
-        slice() {
-          var start = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : t.numericLiteral(0);
-          var end = arguments[1];
-
+        slice(start = t.numericLiteral(0), end) {
           if (!t.isNumericLiteral(start) || end && !t.isNumericLiteral(end)) {
@@ -100,17 +85,10 @@ return;
         },
-        splice(start, end) {
-          var _node$elements$slice;
-
+        splice(start, end, ...args) {
           if (!t.isNumericLiteral(start) || end && !t.isNumericLiteral(end)) {
             return;
           }
-
-          for (var _len2 = arguments.length, args = Array(_len2 > 2 ? _len2 - 2 : 0), _key2 = 2; _key2 < _len2; _key2++) {
-            args[_key2 - 2] = arguments[_key2];
-          }
-
           if (end) {
             args.unshift(end.value);
           }
-          return t.arrayExpression((_node$elements$slice = this.node.elements.slice()).splice.apply(_node$elements$slice, [start.value].concat(args)));
+          return t.arrayExpression(this.node.elements.slice().splice(start.value, ...args));
         }
@@ -126,3 +104,3 @@ }
           if (typeof i === "number" || i.match(/^\d+$/)) {
-            var ch = this.node.value[i];
+            const ch = this.node.value[i];
             return ch ? t.stringLiteral(ch) : undef;
@@ -133,6 +111,4 @@ }
       calls: {
-        split() {
-          var sep = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : undef;
-
-          var realSep = null;
+        split(sep = undef) {
+          let realSep = null;
           if (t.isStringLiteral(sep)) {
@@ -145,19 +121,8 @@ realSep = sep.value;
           if (realSep !== null) {
-            return t.arrayExpression(this.node.value.split(realSep).map(function (str) {
-              return t.stringLiteral(str);
-            }));
+            return t.arrayExpression(this.node.value.split(realSep).map(str => t.stringLiteral(str)));
           }
         },
-        charAt: defaultZero(function (_ref2, i) {
-          var value = _ref2.value;
-          return t.stringLiteral(value.charAt(i));
-        }),
-        charCodeAt: defaultZero(function (_ref3, i) {
-          var value = _ref3.value;
-          return t.numericLiteral(value.charCodeAt(i));
-        }),
-        codePointAt: defaultZero(function (_ref4, i) {
-          var value = _ref4.value;
-          return t.numericLiteral(value.codePointAt(i));
-        })
+        charAt: defaultZero(({ value }, i) => t.stringLiteral(value.charAt(i))),
+        charCodeAt: defaultZero(({ value }, i) => t.numericLiteral(value.charCodeAt(i))),
+        codePointAt: defaultZero(({ value }, i) => t.numericLiteral(value.codePointAt(i)))
       }
@@ -164,0 +129,0 @@ }

package.json

 {
   "name": "babel-plugin-minify-constant-folding",
-  "version": "0.3.0-alpha.37064b40",
+  "version": "0.3.0-alpha.5ee3078e",
   "description": "",
@@ -15,4 +15,4 @@ "keywords": [
   "dependencies": {
-    "babel-helper-evaluate-path": "^0.3.0-alpha.37064b40"
+    "babel-helper-evaluate-path": "^0.3.0-alpha.5ee3078e"
   }
 }

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Worsened metrics

Total package byte prevSize

11245

decreased by-13.07%

Lines of code

279

decreased by-11.15%

Dependency changes

• Updatedbabel-helper-evaluate-path@^0.3.0-alpha.5ee3078e