turndown - npm Package Compare versions

Comparing version 7.0.0 to 7.1.0

dist/turndown.js

@@ -1,4 +0,6 @@
-var TurndownService = (function () {
+var TurndownService = (function (domino) {
   'use strict';
 
+  domino = domino && Object.prototype.hasOwnProperty.call(domino, 'default') ? domino['default'] : domino;
+
   function extend (destination) {
@@ -18,2 +20,13 @@ for (var i = 1; i < arguments.length; i++) {
 
+  function trimLeadingNewlines (string) {
+    return string.replace(/^\n*/, '')
+  }
+
+  function trimTrailingNewlines (string) {
+    // avoid match-at-end regexp bottleneck, see #370
+    var indexEnd = string.length;
+    while (indexEnd > 0 && string[indexEnd - 1] === '\n') indexEnd--;
+    return string.substring(0, indexEnd)
+  }
+
   var blockElements = [
@@ -304,15 +317,11 @@ 'ADDRESS', 'ARTICLE', 'ASIDE', 'AUDIO', 'BLOCKQUOTE', 'BODY', 'CANVAS',
     replacement: function (content) {
-      if (!content.trim()) return ''
+      if (!content) return ''
+      content = content.replace(/\r?\n|\r/g, ' ');
 
+      var extraSpace = /^`|^ .*?[^ ].* $|`$/.test(content) ? ' ' : '';
       var delimiter = '`';
-      var leadingSpace = '';
-      var trailingSpace = '';
-      var matches = content.match(/`+/gm);
-      if (matches) {
-        if (/^`/.test(content)) leadingSpace = ' ';
-        if (/`$/.test(content)) trailingSpace = ' ';
-        while (matches.indexOf(delimiter) !== -1) delimiter = delimiter + '`';
-      }
+      var matches = content.match(/`+/gm) || [];
+      while (matches.indexOf(delimiter) !== -1) delimiter = delimiter + '`';
 
-      return delimiter + leadingSpace + content + trailingSpace + delimiter
+      return delimiter + extraSpace + content + extraSpace + delimiter
     }
@@ -461,3 +470,3 @@ };
     var prevText = null;
-    var prevVoid = false;
+    var keepLeadingWs = false;
 
@@ -472,3 +481,3 @@ var prev = null;
         if ((!prevText || / $/.test(prevText.data)) &&
-            !prevVoid && text[0] === ' ') {
+            !keepLeadingWs && text[0] === ' ') {
           text = text.substr(1);
@@ -493,7 +502,10 @@ }
           prevText = null;
-          prevVoid = false;
-        } else if (isVoid(node)) {
-          // Avoid trimming space around non-block, non-BR void elements.
+          keepLeadingWs = false;
+        } else if (isVoid(node) || isPre(node)) {
+          // Avoid trimming space around non-block, non-BR void elements and inline PRE.
           prevText = null;
-          prevVoid = true;
+          keepLeadingWs = true;
+        } else if (prevText) {
+          // Drop protection if set previously.
+          keepLeadingWs = false;
         }
@@ -614,3 +626,3 @@ } else {
 
-  function RootNode (input) {
+  function RootNode (input, options) {
     var root;
@@ -632,3 +644,4 @@ if (typeof input === 'string') {
       isBlock: isBlock,
-      isVoid: isVoid
+      isVoid: isVoid,
+      isPre: options.preformattedCode ? isPreOrCode : null
     });
@@ -645,7 +658,11 @@
 
-  function Node (node) {
+  function isPreOrCode (node) {
+    return node.nodeName === 'PRE' || node.nodeName === 'CODE'
+  }
+
+  function Node (node, options) {
     node.isBlock = isBlock(node);
-    node.isCode = node.nodeName.toLowerCase() === 'code' || node.parentNode.isCode;
+    node.isCode = node.nodeName === 'CODE' || node.parentNode.isCode;
     node.isBlank = isBlank(node);
-    node.flankingWhitespace = flankingWhitespace(node);
+    node.flankingWhitespace = flankingWhitespace(node, options);
     return node
@@ -664,24 +681,35 @@ }
 
-  function flankingWhitespace (node) {
-    var leading = '';
-    var trailing = '';
+  function flankingWhitespace (node, options) {
+    if (node.isBlock || (options.preformattedCode && node.isCode)) {
+      return { leading: '', trailing: '' }
+    }
 
-    if (!node.isBlock) {
-      var hasLeading = /^\s/.test(node.textContent);
-      var hasTrailing = /\s$/.test(node.textContent);
-      var blankWithSpaces = node.isBlank && hasLeading && hasTrailing;
+    var edges = edgeWhitespace(node.textContent);
 
-      if (hasLeading && !isFlankedByWhitespace('left', node)) {
-        leading = ' ';
-      }
+    // abandon leading ASCII WS if left-flanked by ASCII WS
+    if (edges.leadingAscii && isFlankedByWhitespace('left', node, options)) {
+      edges.leading = edges.leadingNonAscii;
+    }
 
-      if (!blankWithSpaces && hasTrailing && !isFlankedByWhitespace('right', node)) {
-        trailing = ' ';
-      }
+    // abandon trailing ASCII WS if right-flanked by ASCII WS
+    if (edges.trailingAscii && isFlankedByWhitespace('right', node, options)) {
+      edges.trailing = edges.trailingNonAscii;
     }
 
-    return { leading: leading, trailing: trailing }
+    return { leading: edges.leading, trailing: edges.trailing }
   }
 
-  function isFlankedByWhitespace (side, node) {
+  function edgeWhitespace (string) {
+    var m = string.match(/^(([ \t\r\n]*)(\s*))[\s\S]*?((\s*?)([ \t\r\n]*))$/);
+    return {
+      leading: m[1], // whole string for whitespace-only strings
+      leadingAscii: m[2],
+      leadingNonAscii: m[3],
+      trailing: m[4], // empty for whitespace-only strings
+      trailingNonAscii: m[5],
+      trailingAscii: m[6]
+    }
+  }
+
+  function isFlankedByWhitespace (side, node, options) {
     var sibling;
@@ -702,2 +730,4 @@ var regExp;
         isFlanked = regExp.test(sibling.nodeValue);
+      } else if (options.preformattedCode && sibling.nodeName === 'CODE') {
+        isFlanked = false;
       } else if (sibling.nodeType === 1 && !isBlock(sibling)) {
@@ -711,4 +741,2 @@ isFlanked = regExp.test(sibling.textContent);
   var reduce = Array.prototype.reduce;
-  var leadingNewLinesRegExp = /^\n*/;
-  var trailingNewLinesRegExp = /\n*$/;
   var escapes = [
@@ -745,2 +773,3 @@ [/\\/g, '\\\\'],
       br: '  ',
+      preformattedCode: false,
       blankReplacement: function (content, node) {
@@ -778,3 +807,3 @@ return node.isBlock ? '\n\n' : ''
 
-      var output = process.call(this, new RootNode(input));
+      var output = process.call(this, new RootNode(input, this.options));
       return postProcess.call(this, output)
@@ -868,3 +897,3 @@ },
     return reduce.call(parentNode.childNodes, function (output, node) {
-      node = new Node(node);
+      node = new Node(node, self.options);
 
@@ -922,27 +951,17 @@ var replacement = '';
   /**
-   * Determines the new lines between the current output and the replacement
+   * Joins replacement to the current output with appropriate number of new lines
    * @private
    * @param {String} output The current conversion output
    * @param {String} replacement The string to append to the output
-   * @returns The whitespace to separate the current output and the replacement
+   * @returns Joined output
    * @type String
    */
 
-  function separatingNewlines (output, replacement) {
-    var newlines = [
-      output.match(trailingNewLinesRegExp)[0],
-      replacement.match(leadingNewLinesRegExp)[0]
-    ].sort();
-    var maxNewlines = newlines[newlines.length - 1];
-    return maxNewlines.length < 2 ? maxNewlines : '\n\n'
-  }
+  function join (output, replacement) {
+    var s1 = trimTrailingNewlines(output);
+    var s2 = trimLeadingNewlines(replacement);
+    var nls = Math.max(output.length - s1.length, replacement.length - s2.length);
+    var separator = '\n\n'.substring(0, nls);
 
-  function join (string1, string2) {
-    var separator = separatingNewlines(string1, string2);
-
-    // Remove trailing/leading newlines and replace with separator
-    string1 = string1.replace(trailingNewLinesRegExp, '');
-    string2 = string2.replace(leadingNewLinesRegExp, '');
-
-    return string1 + separator + string2
+    return s1 + separator + s2
   }
@@ -971,2 +990,2 @@
 
-}());
+}(domino));

lib/turndown.browser.cjs.js

 'use strict';
 
+require('domino');
+
 function extend (destination) {
@@ -17,2 +19,13 @@ for (var i = 1; i < arguments.length; i++) {
 
+function trimLeadingNewlines (string) {
+  return string.replace(/^\n*/, '')
+}
+
+function trimTrailingNewlines (string) {
+  // avoid match-at-end regexp bottleneck, see #370
+  var indexEnd = string.length;
+  while (indexEnd > 0 && string[indexEnd - 1] === '\n') indexEnd--;
+  return string.substring(0, indexEnd)
+}
+
 var blockElements = [
@@ -303,15 +316,11 @@ 'ADDRESS', 'ARTICLE', 'ASIDE', 'AUDIO', 'BLOCKQUOTE', 'BODY', 'CANVAS',
   replacement: function (content) {
-    if (!content.trim()) return ''
+    if (!content) return ''
+    content = content.replace(/\r?\n|\r/g, ' ');
 
+    var extraSpace = /^`|^ .*?[^ ].* $|`$/.test(content) ? ' ' : '';
     var delimiter = '`';
-    var leadingSpace = '';
-    var trailingSpace = '';
-    var matches = content.match(/`+/gm);
-    if (matches) {
-      if (/^`/.test(content)) leadingSpace = ' ';
-      if (/`$/.test(content)) trailingSpace = ' ';
-      while (matches.indexOf(delimiter) !== -1) delimiter = delimiter + '`';
-    }
+    var matches = content.match(/`+/gm) || [];
+    while (matches.indexOf(delimiter) !== -1) delimiter = delimiter + '`';
 
-    return delimiter + leadingSpace + content + trailingSpace + delimiter
+    return delimiter + extraSpace + content + extraSpace + delimiter
   }
@@ -460,3 +469,3 @@ };
   var prevText = null;
-  var prevVoid = false;
+  var keepLeadingWs = false;
 
@@ -471,3 +480,3 @@ var prev = null;
       if ((!prevText || / $/.test(prevText.data)) &&
-          !prevVoid && text[0] === ' ') {
+          !keepLeadingWs && text[0] === ' ') {
         text = text.substr(1);
@@ -492,7 +501,10 @@ }
         prevText = null;
-        prevVoid = false;
-      } else if (isVoid(node)) {
-        // Avoid trimming space around non-block, non-BR void elements.
+        keepLeadingWs = false;
+      } else if (isVoid(node) || isPre(node)) {
+        // Avoid trimming space around non-block, non-BR void elements and inline PRE.
         prevText = null;
-        prevVoid = true;
+        keepLeadingWs = true;
+      } else if (prevText) {
+        // Drop protection if set previously.
+        keepLeadingWs = false;
       }
@@ -613,3 +625,3 @@ } else {
 
-function RootNode (input) {
+function RootNode (input, options) {
   var root;
@@ -631,3 +643,4 @@ if (typeof input === 'string') {
     isBlock: isBlock,
-    isVoid: isVoid
+    isVoid: isVoid,
+    isPre: options.preformattedCode ? isPreOrCode : null
   });
@@ -644,7 +657,11 @@
 
-function Node (node) {
+function isPreOrCode (node) {
+  return node.nodeName === 'PRE' || node.nodeName === 'CODE'
+}
+
+function Node (node, options) {
   node.isBlock = isBlock(node);
-  node.isCode = node.nodeName.toLowerCase() === 'code' || node.parentNode.isCode;
+  node.isCode = node.nodeName === 'CODE' || node.parentNode.isCode;
   node.isBlank = isBlank(node);
-  node.flankingWhitespace = flankingWhitespace(node);
+  node.flankingWhitespace = flankingWhitespace(node, options);
   return node
@@ -663,24 +680,35 @@ }
 
-function flankingWhitespace (node) {
-  var leading = '';
-  var trailing = '';
+function flankingWhitespace (node, options) {
+  if (node.isBlock || (options.preformattedCode && node.isCode)) {
+    return { leading: '', trailing: '' }
+  }
 
-  if (!node.isBlock) {
-    var hasLeading = /^\s/.test(node.textContent);
-    var hasTrailing = /\s$/.test(node.textContent);
-    var blankWithSpaces = node.isBlank && hasLeading && hasTrailing;
+  var edges = edgeWhitespace(node.textContent);
 
-    if (hasLeading && !isFlankedByWhitespace('left', node)) {
-      leading = ' ';
-    }
+  // abandon leading ASCII WS if left-flanked by ASCII WS
+  if (edges.leadingAscii && isFlankedByWhitespace('left', node, options)) {
+    edges.leading = edges.leadingNonAscii;
+  }
 
-    if (!blankWithSpaces && hasTrailing && !isFlankedByWhitespace('right', node)) {
-      trailing = ' ';
-    }
+  // abandon trailing ASCII WS if right-flanked by ASCII WS
+  if (edges.trailingAscii && isFlankedByWhitespace('right', node, options)) {
+    edges.trailing = edges.trailingNonAscii;
   }
 
-  return { leading: leading, trailing: trailing }
+  return { leading: edges.leading, trailing: edges.trailing }
 }
 
-function isFlankedByWhitespace (side, node) {
+function edgeWhitespace (string) {
+  var m = string.match(/^(([ \t\r\n]*)(\s*))[\s\S]*?((\s*?)([ \t\r\n]*))$/);
+  return {
+    leading: m[1], // whole string for whitespace-only strings
+    leadingAscii: m[2],
+    leadingNonAscii: m[3],
+    trailing: m[4], // empty for whitespace-only strings
+    trailingNonAscii: m[5],
+    trailingAscii: m[6]
+  }
+}
+
+function isFlankedByWhitespace (side, node, options) {
   var sibling;
@@ -701,2 +729,4 @@ var regExp;
       isFlanked = regExp.test(sibling.nodeValue);
+    } else if (options.preformattedCode && sibling.nodeName === 'CODE') {
+      isFlanked = false;
     } else if (sibling.nodeType === 1 && !isBlock(sibling)) {
@@ -710,4 +740,2 @@ isFlanked = regExp.test(sibling.textContent);
 var reduce = Array.prototype.reduce;
-var leadingNewLinesRegExp = /^\n*/;
-var trailingNewLinesRegExp = /\n*$/;
 var escapes = [
@@ -744,2 +772,3 @@ [/\\/g, '\\\\'],
     br: '  ',
+    preformattedCode: false,
     blankReplacement: function (content, node) {
@@ -777,3 +806,3 @@ return node.isBlock ? '\n\n' : ''
 
-    var output = process.call(this, new RootNode(input));
+    var output = process.call(this, new RootNode(input, this.options));
     return postProcess.call(this, output)
@@ -867,3 +896,3 @@ },
   return reduce.call(parentNode.childNodes, function (output, node) {
-    node = new Node(node);
+    node = new Node(node, self.options);
 
@@ -921,27 +950,17 @@ var replacement = '';
 /**
- * Determines the new lines between the current output and the replacement
+ * Joins replacement to the current output with appropriate number of new lines
  * @private
  * @param {String} output The current conversion output
  * @param {String} replacement The string to append to the output
- * @returns The whitespace to separate the current output and the replacement
+ * @returns Joined output
  * @type String
  */
 
-function separatingNewlines (output, replacement) {
-  var newlines = [
-    output.match(trailingNewLinesRegExp)[0],
-    replacement.match(leadingNewLinesRegExp)[0]
-  ].sort();
-  var maxNewlines = newlines[newlines.length - 1];
-  return maxNewlines.length < 2 ? maxNewlines : '\n\n'
-}
+function join (output, replacement) {
+  var s1 = trimTrailingNewlines(output);
+  var s2 = trimLeadingNewlines(replacement);
+  var nls = Math.max(output.length - s1.length, replacement.length - s2.length);
+  var separator = '\n\n'.substring(0, nls);
 
-function join (string1, string2) {
-  var separator = separatingNewlines(string1, string2);
-
-  // Remove trailing/leading newlines and replace with separator
-  string1 = string1.replace(trailingNewLinesRegExp, '');
-  string2 = string2.replace(leadingNewLinesRegExp, '');
-
-  return string1 + separator + string2
+  return s1 + separator + s2
 }
@@ -948,0 +967,0 @@

lib/turndown.browser.es.js

@@ -0,1 +1,3 @@
+import 'domino';
+
 function extend (destination) {
@@ -15,2 +17,13 @@ for (var i = 1; i < arguments.length; i++) {
 
+function trimLeadingNewlines (string) {
+  return string.replace(/^\n*/, '')
+}
+
+function trimTrailingNewlines (string) {
+  // avoid match-at-end regexp bottleneck, see #370
+  var indexEnd = string.length;
+  while (indexEnd > 0 && string[indexEnd - 1] === '\n') indexEnd--;
+  return string.substring(0, indexEnd)
+}
+
 var blockElements = [
@@ -301,15 +314,11 @@ 'ADDRESS', 'ARTICLE', 'ASIDE', 'AUDIO', 'BLOCKQUOTE', 'BODY', 'CANVAS',
   replacement: function (content) {
-    if (!content.trim()) return ''
+    if (!content) return ''
+    content = content.replace(/\r?\n|\r/g, ' ');
 
+    var extraSpace = /^`|^ .*?[^ ].* $|`$/.test(content) ? ' ' : '';
     var delimiter = '`';
-    var leadingSpace = '';
-    var trailingSpace = '';
-    var matches = content.match(/`+/gm);
-    if (matches) {
-      if (/^`/.test(content)) leadingSpace = ' ';
-      if (/`$/.test(content)) trailingSpace = ' ';
-      while (matches.indexOf(delimiter) !== -1) delimiter = delimiter + '`';
-    }
+    var matches = content.match(/`+/gm) || [];
+    while (matches.indexOf(delimiter) !== -1) delimiter = delimiter + '`';
 
-    return delimiter + leadingSpace + content + trailingSpace + delimiter
+    return delimiter + extraSpace + content + extraSpace + delimiter
   }
@@ -458,3 +467,3 @@ };
   var prevText = null;
-  var prevVoid = false;
+  var keepLeadingWs = false;
 
@@ -469,3 +478,3 @@ var prev = null;
       if ((!prevText || / $/.test(prevText.data)) &&
-          !prevVoid && text[0] === ' ') {
+          !keepLeadingWs && text[0] === ' ') {
         text = text.substr(1);
@@ -490,7 +499,10 @@ }
         prevText = null;
-        prevVoid = false;
-      } else if (isVoid(node)) {
-        // Avoid trimming space around non-block, non-BR void elements.
+        keepLeadingWs = false;
+      } else if (isVoid(node) || isPre(node)) {
+        // Avoid trimming space around non-block, non-BR void elements and inline PRE.
         prevText = null;
-        prevVoid = true;
+        keepLeadingWs = true;
+      } else if (prevText) {
+        // Drop protection if set previously.
+        keepLeadingWs = false;
       }
@@ -611,3 +623,3 @@ } else {
 
-function RootNode (input) {
+function RootNode (input, options) {
   var root;
@@ -629,3 +641,4 @@ if (typeof input === 'string') {
     isBlock: isBlock,
-    isVoid: isVoid
+    isVoid: isVoid,
+    isPre: options.preformattedCode ? isPreOrCode : null
   });
@@ -642,7 +655,11 @@
 
-function Node (node) {
+function isPreOrCode (node) {
+  return node.nodeName === 'PRE' || node.nodeName === 'CODE'
+}
+
+function Node (node, options) {
   node.isBlock = isBlock(node);
-  node.isCode = node.nodeName.toLowerCase() === 'code' || node.parentNode.isCode;
+  node.isCode = node.nodeName === 'CODE' || node.parentNode.isCode;
   node.isBlank = isBlank(node);
-  node.flankingWhitespace = flankingWhitespace(node);
+  node.flankingWhitespace = flankingWhitespace(node, options);
   return node
@@ -661,24 +678,35 @@ }
 
-function flankingWhitespace (node) {
-  var leading = '';
-  var trailing = '';
+function flankingWhitespace (node, options) {
+  if (node.isBlock || (options.preformattedCode && node.isCode)) {
+    return { leading: '', trailing: '' }
+  }
 
-  if (!node.isBlock) {
-    var hasLeading = /^\s/.test(node.textContent);
-    var hasTrailing = /\s$/.test(node.textContent);
-    var blankWithSpaces = node.isBlank && hasLeading && hasTrailing;
+  var edges = edgeWhitespace(node.textContent);
 
-    if (hasLeading && !isFlankedByWhitespace('left', node)) {
-      leading = ' ';
-    }
+  // abandon leading ASCII WS if left-flanked by ASCII WS
+  if (edges.leadingAscii && isFlankedByWhitespace('left', node, options)) {
+    edges.leading = edges.leadingNonAscii;
+  }
 
-    if (!blankWithSpaces && hasTrailing && !isFlankedByWhitespace('right', node)) {
-      trailing = ' ';
-    }
+  // abandon trailing ASCII WS if right-flanked by ASCII WS
+  if (edges.trailingAscii && isFlankedByWhitespace('right', node, options)) {
+    edges.trailing = edges.trailingNonAscii;
   }
 
-  return { leading: leading, trailing: trailing }
+  return { leading: edges.leading, trailing: edges.trailing }
 }
 
-function isFlankedByWhitespace (side, node) {
+function edgeWhitespace (string) {
+  var m = string.match(/^(([ \t\r\n]*)(\s*))[\s\S]*?((\s*?)([ \t\r\n]*))$/);
+  return {
+    leading: m[1], // whole string for whitespace-only strings
+    leadingAscii: m[2],
+    leadingNonAscii: m[3],
+    trailing: m[4], // empty for whitespace-only strings
+    trailingNonAscii: m[5],
+    trailingAscii: m[6]
+  }
+}
+
+function isFlankedByWhitespace (side, node, options) {
   var sibling;
@@ -699,2 +727,4 @@ var regExp;
       isFlanked = regExp.test(sibling.nodeValue);
+    } else if (options.preformattedCode && sibling.nodeName === 'CODE') {
+      isFlanked = false;
     } else if (sibling.nodeType === 1 && !isBlock(sibling)) {
@@ -708,4 +738,2 @@ isFlanked = regExp.test(sibling.textContent);
 var reduce = Array.prototype.reduce;
-var leadingNewLinesRegExp = /^\n*/;
-var trailingNewLinesRegExp = /\n*$/;
 var escapes = [
@@ -742,2 +770,3 @@ [/\\/g, '\\\\'],
     br: '  ',
+    preformattedCode: false,
     blankReplacement: function (content, node) {
@@ -775,3 +804,3 @@ return node.isBlock ? '\n\n' : ''
 
-    var output = process.call(this, new RootNode(input));
+    var output = process.call(this, new RootNode(input, this.options));
     return postProcess.call(this, output)
@@ -865,3 +894,3 @@ },
   return reduce.call(parentNode.childNodes, function (output, node) {
-    node = new Node(node);
+    node = new Node(node, self.options);
 
@@ -919,27 +948,17 @@ var replacement = '';
 /**
- * Determines the new lines between the current output and the replacement
+ * Joins replacement to the current output with appropriate number of new lines
  * @private
  * @param {String} output The current conversion output
  * @param {String} replacement The string to append to the output
- * @returns The whitespace to separate the current output and the replacement
+ * @returns Joined output
  * @type String
  */
 
-function separatingNewlines (output, replacement) {
-  var newlines = [
-    output.match(trailingNewLinesRegExp)[0],
-    replacement.match(leadingNewLinesRegExp)[0]
-  ].sort();
-  var maxNewlines = newlines[newlines.length - 1];
-  return maxNewlines.length < 2 ? maxNewlines : '\n\n'
-}
+function join (output, replacement) {
+  var s1 = trimTrailingNewlines(output);
+  var s2 = trimLeadingNewlines(replacement);
+  var nls = Math.max(output.length - s1.length, replacement.length - s2.length);
+  var separator = '\n\n'.substring(0, nls);
 
-function join (string1, string2) {
-  var separator = separatingNewlines(string1, string2);
-
-  // Remove trailing/leading newlines and replace with separator
-  string1 = string1.replace(trailingNewLinesRegExp, '');
-  string2 = string2.replace(leadingNewLinesRegExp, '');
-
-  return string1 + separator + string2
+  return s1 + separator + s2
 }
@@ -946,0 +965,0 @@

lib/turndown.browser.umd.js

 (function (global, factory) {
-  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
-  typeof define === 'function' && define.amd ? define(factory) :
-  (global = global || self, global.TurndownService = factory());
-}(this, (function () { 'use strict';
+  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('domino')) :
+  typeof define === 'function' && define.amd ? define(['domino'], factory) :
+  (global = global || self, global.TurndownService = factory(global.domino));
+}(this, (function (domino) { 'use strict';
 
+  domino = domino && Object.prototype.hasOwnProperty.call(domino, 'default') ? domino['default'] : domino;
+
   function extend (destination) {
@@ -21,2 +23,13 @@ for (var i = 1; i < arguments.length; i++) {
 
+  function trimLeadingNewlines (string) {
+    return string.replace(/^\n*/, '')
+  }
+
+  function trimTrailingNewlines (string) {
+    // avoid match-at-end regexp bottleneck, see #370
+    var indexEnd = string.length;
+    while (indexEnd > 0 && string[indexEnd - 1] === '\n') indexEnd--;
+    return string.substring(0, indexEnd)
+  }
+
   var blockElements = [
@@ -307,15 +320,11 @@ 'ADDRESS', 'ARTICLE', 'ASIDE', 'AUDIO', 'BLOCKQUOTE', 'BODY', 'CANVAS',
     replacement: function (content) {
-      if (!content.trim()) return ''
+      if (!content) return ''
+      content = content.replace(/\r?\n|\r/g, ' ');
 
+      var extraSpace = /^`|^ .*?[^ ].* $|`$/.test(content) ? ' ' : '';
       var delimiter = '`';
-      var leadingSpace = '';
-      var trailingSpace = '';
-      var matches = content.match(/`+/gm);
-      if (matches) {
-        if (/^`/.test(content)) leadingSpace = ' ';
-        if (/`$/.test(content)) trailingSpace = ' ';
-        while (matches.indexOf(delimiter) !== -1) delimiter = delimiter + '`';
-      }
+      var matches = content.match(/`+/gm) || [];
+      while (matches.indexOf(delimiter) !== -1) delimiter = delimiter + '`';
 
-      return delimiter + leadingSpace + content + trailingSpace + delimiter
+      return delimiter + extraSpace + content + extraSpace + delimiter
     }
@@ -464,3 +473,3 @@ };
     var prevText = null;
-    var prevVoid = false;
+    var keepLeadingWs = false;
 
@@ -475,3 +484,3 @@ var prev = null;
         if ((!prevText || / $/.test(prevText.data)) &&
-            !prevVoid && text[0] === ' ') {
+            !keepLeadingWs && text[0] === ' ') {
           text = text.substr(1);
@@ -496,7 +505,10 @@ }
           prevText = null;
-          prevVoid = false;
-        } else if (isVoid(node)) {
-          // Avoid trimming space around non-block, non-BR void elements.
+          keepLeadingWs = false;
+        } else if (isVoid(node) || isPre(node)) {
+          // Avoid trimming space around non-block, non-BR void elements and inline PRE.
           prevText = null;
-          prevVoid = true;
+          keepLeadingWs = true;
+        } else if (prevText) {
+          // Drop protection if set previously.
+          keepLeadingWs = false;
         }
@@ -617,3 +629,3 @@ } else {
 
-  function RootNode (input) {
+  function RootNode (input, options) {
     var root;
@@ -635,3 +647,4 @@ if (typeof input === 'string') {
       isBlock: isBlock,
-      isVoid: isVoid
+      isVoid: isVoid,
+      isPre: options.preformattedCode ? isPreOrCode : null
     });
@@ -648,7 +661,11 @@
 
-  function Node (node) {
+  function isPreOrCode (node) {
+    return node.nodeName === 'PRE' || node.nodeName === 'CODE'
+  }
+
+  function Node (node, options) {
     node.isBlock = isBlock(node);
-    node.isCode = node.nodeName.toLowerCase() === 'code' || node.parentNode.isCode;
+    node.isCode = node.nodeName === 'CODE' || node.parentNode.isCode;
     node.isBlank = isBlank(node);
-    node.flankingWhitespace = flankingWhitespace(node);
+    node.flankingWhitespace = flankingWhitespace(node, options);
     return node
@@ -667,24 +684,35 @@ }
 
-  function flankingWhitespace (node) {
-    var leading = '';
-    var trailing = '';
+  function flankingWhitespace (node, options) {
+    if (node.isBlock || (options.preformattedCode && node.isCode)) {
+      return { leading: '', trailing: '' }
+    }
 
-    if (!node.isBlock) {
-      var hasLeading = /^\s/.test(node.textContent);
-      var hasTrailing = /\s$/.test(node.textContent);
-      var blankWithSpaces = node.isBlank && hasLeading && hasTrailing;
+    var edges = edgeWhitespace(node.textContent);
 
-      if (hasLeading && !isFlankedByWhitespace('left', node)) {
-        leading = ' ';
-      }
+    // abandon leading ASCII WS if left-flanked by ASCII WS
+    if (edges.leadingAscii && isFlankedByWhitespace('left', node, options)) {
+      edges.leading = edges.leadingNonAscii;
+    }
 
-      if (!blankWithSpaces && hasTrailing && !isFlankedByWhitespace('right', node)) {
-        trailing = ' ';
-      }
+    // abandon trailing ASCII WS if right-flanked by ASCII WS
+    if (edges.trailingAscii && isFlankedByWhitespace('right', node, options)) {
+      edges.trailing = edges.trailingNonAscii;
     }
 
-    return { leading: leading, trailing: trailing }
+    return { leading: edges.leading, trailing: edges.trailing }
   }
 
-  function isFlankedByWhitespace (side, node) {
+  function edgeWhitespace (string) {
+    var m = string.match(/^(([ \t\r\n]*)(\s*))[\s\S]*?((\s*?)([ \t\r\n]*))$/);
+    return {
+      leading: m[1], // whole string for whitespace-only strings
+      leadingAscii: m[2],
+      leadingNonAscii: m[3],
+      trailing: m[4], // empty for whitespace-only strings
+      trailingNonAscii: m[5],
+      trailingAscii: m[6]
+    }
+  }
+
+  function isFlankedByWhitespace (side, node, options) {
     var sibling;
@@ -705,2 +733,4 @@ var regExp;
         isFlanked = regExp.test(sibling.nodeValue);
+      } else if (options.preformattedCode && sibling.nodeName === 'CODE') {
+        isFlanked = false;
       } else if (sibling.nodeType === 1 && !isBlock(sibling)) {
@@ -714,4 +744,2 @@ isFlanked = regExp.test(sibling.textContent);
   var reduce = Array.prototype.reduce;
-  var leadingNewLinesRegExp = /^\n*/;
-  var trailingNewLinesRegExp = /\n*$/;
   var escapes = [
@@ -748,2 +776,3 @@ [/\\/g, '\\\\'],
       br: '  ',
+      preformattedCode: false,
       blankReplacement: function (content, node) {
@@ -781,3 +810,3 @@ return node.isBlock ? '\n\n' : ''
 
-      var output = process.call(this, new RootNode(input));
+      var output = process.call(this, new RootNode(input, this.options));
       return postProcess.call(this, output)
@@ -871,3 +900,3 @@ },
     return reduce.call(parentNode.childNodes, function (output, node) {
-      node = new Node(node);
+      node = new Node(node, self.options);
 
@@ -925,27 +954,17 @@ var replacement = '';
   /**
-   * Determines the new lines between the current output and the replacement
+   * Joins replacement to the current output with appropriate number of new lines
    * @private
    * @param {String} output The current conversion output
    * @param {String} replacement The string to append to the output
-   * @returns The whitespace to separate the current output and the replacement
+   * @returns Joined output
    * @type String
    */
 
-  function separatingNewlines (output, replacement) {
-    var newlines = [
-      output.match(trailingNewLinesRegExp)[0],
-      replacement.match(leadingNewLinesRegExp)[0]
-    ].sort();
-    var maxNewlines = newlines[newlines.length - 1];
-    return maxNewlines.length < 2 ? maxNewlines : '\n\n'
-  }
+  function join (output, replacement) {
+    var s1 = trimTrailingNewlines(output);
+    var s2 = trimLeadingNewlines(replacement);
+    var nls = Math.max(output.length - s1.length, replacement.length - s2.length);
+    var separator = '\n\n'.substring(0, nls);
 
-  function join (string1, string2) {
-    var separator = separatingNewlines(string1, string2);
-
-    // Remove trailing/leading newlines and replace with separator
-    string1 = string1.replace(trailingNewLinesRegExp, '');
-    string2 = string2.replace(leadingNewLinesRegExp, '');
-
-    return string1 + separator + string2
+    return s1 + separator + s2
   }
@@ -952,0 +971,0 @@

lib/turndown.cjs.js

 'use strict';
 
+function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }
+
+var domino = _interopDefault(require('domino'));
+
 function extend (destination) {
@@ -17,2 +21,13 @@ for (var i = 1; i < arguments.length; i++) {
 
+function trimLeadingNewlines (string) {
+  return string.replace(/^\n*/, '')
+}
+
+function trimTrailingNewlines (string) {
+  // avoid match-at-end regexp bottleneck, see #370
+  var indexEnd = string.length;
+  while (indexEnd > 0 && string[indexEnd - 1] === '\n') indexEnd--;
+  return string.substring(0, indexEnd)
+}
+
 var blockElements = [
@@ -303,15 +318,11 @@ 'ADDRESS', 'ARTICLE', 'ASIDE', 'AUDIO', 'BLOCKQUOTE', 'BODY', 'CANVAS',
   replacement: function (content) {
-    if (!content.trim()) return ''
+    if (!content) return ''
+    content = content.replace(/\r?\n|\r/g, ' ');
 
+    var extraSpace = /^`|^ .*?[^ ].* $|`$/.test(content) ? ' ' : '';
     var delimiter = '`';
-    var leadingSpace = '';
-    var trailingSpace = '';
-    var matches = content.match(/`+/gm);
-    if (matches) {
-      if (/^`/.test(content)) leadingSpace = ' ';
-      if (/`$/.test(content)) trailingSpace = ' ';
-      while (matches.indexOf(delimiter) !== -1) delimiter = delimiter + '`';
-    }
+    var matches = content.match(/`+/gm) || [];
+    while (matches.indexOf(delimiter) !== -1) delimiter = delimiter + '`';
 
-    return delimiter + leadingSpace + content + trailingSpace + delimiter
+    return delimiter + extraSpace + content + extraSpace + delimiter
   }
@@ -460,3 +471,3 @@ };
   var prevText = null;
-  var prevVoid = false;
+  var keepLeadingWs = false;
 
@@ -471,3 +482,3 @@ var prev = null;
       if ((!prevText || / $/.test(prevText.data)) &&
-          !prevVoid && text[0] === ' ') {
+          !keepLeadingWs && text[0] === ' ') {
         text = text.substr(1);
@@ -492,7 +503,10 @@ }
         prevText = null;
-        prevVoid = false;
-      } else if (isVoid(node)) {
-        // Avoid trimming space around non-block, non-BR void elements.
+        keepLeadingWs = false;
+      } else if (isVoid(node) || isPre(node)) {
+        // Avoid trimming space around non-block, non-BR void elements and inline PRE.
         prevText = null;
-        prevVoid = true;
+        keepLeadingWs = true;
+      } else if (prevText) {
+        // Drop protection if set previously.
+        keepLeadingWs = false;
       }
@@ -579,5 +593,5 @@ } else {
   {
-    var domino = require('domino');
+    var domino$1 = domino;
     Parser.prototype.parseFromString = function (string) {
-      return domino.createDocument(string)
+      return domino$1.createDocument(string)
     };
@@ -590,3 +604,3 @@ }
 
-function RootNode (input) {
+function RootNode (input, options) {
   var root;
@@ -608,3 +622,4 @@ if (typeof input === 'string') {
     isBlock: isBlock,
-    isVoid: isVoid
+    isVoid: isVoid,
+    isPre: options.preformattedCode ? isPreOrCode : null
   });
@@ -621,7 +636,11 @@
 
-function Node (node) {
+function isPreOrCode (node) {
+  return node.nodeName === 'PRE' || node.nodeName === 'CODE'
+}
+
+function Node (node, options) {
   node.isBlock = isBlock(node);
-  node.isCode = node.nodeName.toLowerCase() === 'code' || node.parentNode.isCode;
+  node.isCode = node.nodeName === 'CODE' || node.parentNode.isCode;
   node.isBlank = isBlank(node);
-  node.flankingWhitespace = flankingWhitespace(node);
+  node.flankingWhitespace = flankingWhitespace(node, options);
   return node
@@ -640,24 +659,35 @@ }
 
-function flankingWhitespace (node) {
-  var leading = '';
-  var trailing = '';
+function flankingWhitespace (node, options) {
+  if (node.isBlock || (options.preformattedCode && node.isCode)) {
+    return { leading: '', trailing: '' }
+  }
 
-  if (!node.isBlock) {
-    var hasLeading = /^\s/.test(node.textContent);
-    var hasTrailing = /\s$/.test(node.textContent);
-    var blankWithSpaces = node.isBlank && hasLeading && hasTrailing;
+  var edges = edgeWhitespace(node.textContent);
 
-    if (hasLeading && !isFlankedByWhitespace('left', node)) {
-      leading = ' ';
-    }
+  // abandon leading ASCII WS if left-flanked by ASCII WS
+  if (edges.leadingAscii && isFlankedByWhitespace('left', node, options)) {
+    edges.leading = edges.leadingNonAscii;
+  }
 
-    if (!blankWithSpaces && hasTrailing && !isFlankedByWhitespace('right', node)) {
-      trailing = ' ';
-    }
+  // abandon trailing ASCII WS if right-flanked by ASCII WS
+  if (edges.trailingAscii && isFlankedByWhitespace('right', node, options)) {
+    edges.trailing = edges.trailingNonAscii;
   }
 
-  return { leading: leading, trailing: trailing }
+  return { leading: edges.leading, trailing: edges.trailing }
 }
 
-function isFlankedByWhitespace (side, node) {
+function edgeWhitespace (string) {
+  var m = string.match(/^(([ \t\r\n]*)(\s*))[\s\S]*?((\s*?)([ \t\r\n]*))$/);
+  return {
+    leading: m[1], // whole string for whitespace-only strings
+    leadingAscii: m[2],
+    leadingNonAscii: m[3],
+    trailing: m[4], // empty for whitespace-only strings
+    trailingNonAscii: m[5],
+    trailingAscii: m[6]
+  }
+}
+
+function isFlankedByWhitespace (side, node, options) {
   var sibling;
@@ -678,2 +708,4 @@ var regExp;
       isFlanked = regExp.test(sibling.nodeValue);
+    } else if (options.preformattedCode && sibling.nodeName === 'CODE') {
+      isFlanked = false;
     } else if (sibling.nodeType === 1 && !isBlock(sibling)) {
@@ -687,4 +719,2 @@ isFlanked = regExp.test(sibling.textContent);
 var reduce = Array.prototype.reduce;
-var leadingNewLinesRegExp = /^\n*/;
-var trailingNewLinesRegExp = /\n*$/;
 var escapes = [
@@ -721,2 +751,3 @@ [/\\/g, '\\\\'],
     br: '  ',
+    preformattedCode: false,
     blankReplacement: function (content, node) {
@@ -754,3 +785,3 @@ return node.isBlock ? '\n\n' : ''
 
-    var output = process.call(this, new RootNode(input));
+    var output = process.call(this, new RootNode(input, this.options));
     return postProcess.call(this, output)
@@ -844,3 +875,3 @@ },
   return reduce.call(parentNode.childNodes, function (output, node) {
-    node = new Node(node);
+    node = new Node(node, self.options);
 
@@ -898,27 +929,17 @@ var replacement = '';
 /**
- * Determines the new lines between the current output and the replacement
+ * Joins replacement to the current output with appropriate number of new lines
  * @private
  * @param {String} output The current conversion output
  * @param {String} replacement The string to append to the output
- * @returns The whitespace to separate the current output and the replacement
+ * @returns Joined output
  * @type String
  */
 
-function separatingNewlines (output, replacement) {
-  var newlines = [
-    output.match(trailingNewLinesRegExp)[0],
-    replacement.match(leadingNewLinesRegExp)[0]
-  ].sort();
-  var maxNewlines = newlines[newlines.length - 1];
-  return maxNewlines.length < 2 ? maxNewlines : '\n\n'
-}
+function join (output, replacement) {
+  var s1 = trimTrailingNewlines(output);
+  var s2 = trimLeadingNewlines(replacement);
+  var nls = Math.max(output.length - s1.length, replacement.length - s2.length);
+  var separator = '\n\n'.substring(0, nls);
 
-function join (string1, string2) {
-  var separator = separatingNewlines(string1, string2);
-
-  // Remove trailing/leading newlines and replace with separator
-  string1 = string1.replace(trailingNewLinesRegExp, '');
-  string2 = string2.replace(leadingNewLinesRegExp, '');
-
-  return string1 + separator + string2
+  return s1 + separator + s2
 }
@@ -925,0 +946,0 @@

lib/turndown.es.js

@@ -0,1 +1,3 @@
+import domino from 'domino';
+
 function extend (destination) {
@@ -15,2 +17,13 @@ for (var i = 1; i < arguments.length; i++) {
 
+function trimLeadingNewlines (string) {
+  return string.replace(/^\n*/, '')
+}
+
+function trimTrailingNewlines (string) {
+  // avoid match-at-end regexp bottleneck, see #370
+  var indexEnd = string.length;
+  while (indexEnd > 0 && string[indexEnd - 1] === '\n') indexEnd--;
+  return string.substring(0, indexEnd)
+}
+
 var blockElements = [
@@ -301,15 +314,11 @@ 'ADDRESS', 'ARTICLE', 'ASIDE', 'AUDIO', 'BLOCKQUOTE', 'BODY', 'CANVAS',
   replacement: function (content) {
-    if (!content.trim()) return ''
+    if (!content) return ''
+    content = content.replace(/\r?\n|\r/g, ' ');
 
+    var extraSpace = /^`|^ .*?[^ ].* $|`$/.test(content) ? ' ' : '';
     var delimiter = '`';
-    var leadingSpace = '';
-    var trailingSpace = '';
-    var matches = content.match(/`+/gm);
-    if (matches) {
-      if (/^`/.test(content)) leadingSpace = ' ';
-      if (/`$/.test(content)) trailingSpace = ' ';
-      while (matches.indexOf(delimiter) !== -1) delimiter = delimiter + '`';
-    }
+    var matches = content.match(/`+/gm) || [];
+    while (matches.indexOf(delimiter) !== -1) delimiter = delimiter + '`';
 
-    return delimiter + leadingSpace + content + trailingSpace + delimiter
+    return delimiter + extraSpace + content + extraSpace + delimiter
   }
@@ -458,3 +467,3 @@ };
   var prevText = null;
-  var prevVoid = false;
+  var keepLeadingWs = false;
 
@@ -469,3 +478,3 @@ var prev = null;
       if ((!prevText || / $/.test(prevText.data)) &&
-          !prevVoid && text[0] === ' ') {
+          !keepLeadingWs && text[0] === ' ') {
         text = text.substr(1);
@@ -490,7 +499,10 @@ }
         prevText = null;
-        prevVoid = false;
-      } else if (isVoid(node)) {
-        // Avoid trimming space around non-block, non-BR void elements.
+        keepLeadingWs = false;
+      } else if (isVoid(node) || isPre(node)) {
+        // Avoid trimming space around non-block, non-BR void elements and inline PRE.
         prevText = null;
-        prevVoid = true;
+        keepLeadingWs = true;
+      } else if (prevText) {
+        // Drop protection if set previously.
+        keepLeadingWs = false;
       }
@@ -577,5 +589,5 @@ } else {
   {
-    var domino = require('domino');
+    var domino$1 = domino;
     Parser.prototype.parseFromString = function (string) {
-      return domino.createDocument(string)
+      return domino$1.createDocument(string)
     };
@@ -588,3 +600,3 @@ }
 
-function RootNode (input) {
+function RootNode (input, options) {
   var root;
@@ -606,3 +618,4 @@ if (typeof input === 'string') {
     isBlock: isBlock,
-    isVoid: isVoid
+    isVoid: isVoid,
+    isPre: options.preformattedCode ? isPreOrCode : null
   });
@@ -619,7 +632,11 @@
 
-function Node (node) {
+function isPreOrCode (node) {
+  return node.nodeName === 'PRE' || node.nodeName === 'CODE'
+}
+
+function Node (node, options) {
   node.isBlock = isBlock(node);
-  node.isCode = node.nodeName.toLowerCase() === 'code' || node.parentNode.isCode;
+  node.isCode = node.nodeName === 'CODE' || node.parentNode.isCode;
   node.isBlank = isBlank(node);
-  node.flankingWhitespace = flankingWhitespace(node);
+  node.flankingWhitespace = flankingWhitespace(node, options);
   return node
@@ -638,24 +655,35 @@ }
 
-function flankingWhitespace (node) {
-  var leading = '';
-  var trailing = '';
+function flankingWhitespace (node, options) {
+  if (node.isBlock || (options.preformattedCode && node.isCode)) {
+    return { leading: '', trailing: '' }
+  }
 
-  if (!node.isBlock) {
-    var hasLeading = /^\s/.test(node.textContent);
-    var hasTrailing = /\s$/.test(node.textContent);
-    var blankWithSpaces = node.isBlank && hasLeading && hasTrailing;
+  var edges = edgeWhitespace(node.textContent);
 
-    if (hasLeading && !isFlankedByWhitespace('left', node)) {
-      leading = ' ';
-    }
+  // abandon leading ASCII WS if left-flanked by ASCII WS
+  if (edges.leadingAscii && isFlankedByWhitespace('left', node, options)) {
+    edges.leading = edges.leadingNonAscii;
+  }
 
-    if (!blankWithSpaces && hasTrailing && !isFlankedByWhitespace('right', node)) {
-      trailing = ' ';
-    }
+  // abandon trailing ASCII WS if right-flanked by ASCII WS
+  if (edges.trailingAscii && isFlankedByWhitespace('right', node, options)) {
+    edges.trailing = edges.trailingNonAscii;
   }
 
-  return { leading: leading, trailing: trailing }
+  return { leading: edges.leading, trailing: edges.trailing }
 }
 
-function isFlankedByWhitespace (side, node) {
+function edgeWhitespace (string) {
+  var m = string.match(/^(([ \t\r\n]*)(\s*))[\s\S]*?((\s*?)([ \t\r\n]*))$/);
+  return {
+    leading: m[1], // whole string for whitespace-only strings
+    leadingAscii: m[2],
+    leadingNonAscii: m[3],
+    trailing: m[4], // empty for whitespace-only strings
+    trailingNonAscii: m[5],
+    trailingAscii: m[6]
+  }
+}
+
+function isFlankedByWhitespace (side, node, options) {
   var sibling;
@@ -676,2 +704,4 @@ var regExp;
       isFlanked = regExp.test(sibling.nodeValue);
+    } else if (options.preformattedCode && sibling.nodeName === 'CODE') {
+      isFlanked = false;
     } else if (sibling.nodeType === 1 && !isBlock(sibling)) {
@@ -685,4 +715,2 @@ isFlanked = regExp.test(sibling.textContent);
 var reduce = Array.prototype.reduce;
-var leadingNewLinesRegExp = /^\n*/;
-var trailingNewLinesRegExp = /\n*$/;
 var escapes = [
@@ -719,2 +747,3 @@ [/\\/g, '\\\\'],
     br: '  ',
+    preformattedCode: false,
     blankReplacement: function (content, node) {
@@ -752,3 +781,3 @@ return node.isBlock ? '\n\n' : ''
 
-    var output = process.call(this, new RootNode(input));
+    var output = process.call(this, new RootNode(input, this.options));
     return postProcess.call(this, output)
@@ -842,3 +871,3 @@ },
   return reduce.call(parentNode.childNodes, function (output, node) {
-    node = new Node(node);
+    node = new Node(node, self.options);
 
@@ -896,27 +925,17 @@ var replacement = '';
 /**
- * Determines the new lines between the current output and the replacement
+ * Joins replacement to the current output with appropriate number of new lines
  * @private
  * @param {String} output The current conversion output
  * @param {String} replacement The string to append to the output
- * @returns The whitespace to separate the current output and the replacement
+ * @returns Joined output
  * @type String
  */
 
-function separatingNewlines (output, replacement) {
-  var newlines = [
-    output.match(trailingNewLinesRegExp)[0],
-    replacement.match(leadingNewLinesRegExp)[0]
-  ].sort();
-  var maxNewlines = newlines[newlines.length - 1];
-  return maxNewlines.length < 2 ? maxNewlines : '\n\n'
-}
+function join (output, replacement) {
+  var s1 = trimTrailingNewlines(output);
+  var s2 = trimLeadingNewlines(replacement);
+  var nls = Math.max(output.length - s1.length, replacement.length - s2.length);
+  var separator = '\n\n'.substring(0, nls);
 
-function join (string1, string2) {
-  var separator = separatingNewlines(string1, string2);
-
-  // Remove trailing/leading newlines and replace with separator
-  string1 = string1.replace(trailingNewLinesRegExp, '');
-  string2 = string2.replace(leadingNewLinesRegExp, '');
-
-  return string1 + separator + string2
+  return s1 + separator + s2
 }
@@ -923,0 +942,0 @@

lib/turndown.umd.js

 (function (global, factory) {
-  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
-  typeof define === 'function' && define.amd ? define(factory) :
-  (global = global || self, global.TurndownService = factory());
-}(this, (function () { 'use strict';
+  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('domino')) :
+  typeof define === 'function' && define.amd ? define(['domino'], factory) :
+  (global = global || self, global.TurndownService = factory(global.domino));
+}(this, (function (domino) { 'use strict';
 
+  domino = domino && Object.prototype.hasOwnProperty.call(domino, 'default') ? domino['default'] : domino;
+
   function extend (destination) {
@@ -21,2 +23,13 @@ for (var i = 1; i < arguments.length; i++) {
 
+  function trimLeadingNewlines (string) {
+    return string.replace(/^\n*/, '')
+  }
+
+  function trimTrailingNewlines (string) {
+    // avoid match-at-end regexp bottleneck, see #370
+    var indexEnd = string.length;
+    while (indexEnd > 0 && string[indexEnd - 1] === '\n') indexEnd--;
+    return string.substring(0, indexEnd)
+  }
+
   var blockElements = [
@@ -307,15 +320,11 @@ 'ADDRESS', 'ARTICLE', 'ASIDE', 'AUDIO', 'BLOCKQUOTE', 'BODY', 'CANVAS',
     replacement: function (content) {
-      if (!content.trim()) return ''
+      if (!content) return ''
+      content = content.replace(/\r?\n|\r/g, ' ');
 
+      var extraSpace = /^`|^ .*?[^ ].* $|`$/.test(content) ? ' ' : '';
       var delimiter = '`';
-      var leadingSpace = '';
-      var trailingSpace = '';
-      var matches = content.match(/`+/gm);
-      if (matches) {
-        if (/^`/.test(content)) leadingSpace = ' ';
-        if (/`$/.test(content)) trailingSpace = ' ';
-        while (matches.indexOf(delimiter) !== -1) delimiter = delimiter + '`';
-      }
+      var matches = content.match(/`+/gm) || [];
+      while (matches.indexOf(delimiter) !== -1) delimiter = delimiter + '`';
 
-      return delimiter + leadingSpace + content + trailingSpace + delimiter
+      return delimiter + extraSpace + content + extraSpace + delimiter
     }
@@ -464,3 +473,3 @@ };
     var prevText = null;
-    var prevVoid = false;
+    var keepLeadingWs = false;
 
@@ -475,3 +484,3 @@ var prev = null;
         if ((!prevText || / $/.test(prevText.data)) &&
-            !prevVoid && text[0] === ' ') {
+            !keepLeadingWs && text[0] === ' ') {
           text = text.substr(1);
@@ -496,7 +505,10 @@ }
           prevText = null;
-          prevVoid = false;
-        } else if (isVoid(node)) {
-          // Avoid trimming space around non-block, non-BR void elements.
+          keepLeadingWs = false;
+        } else if (isVoid(node) || isPre(node)) {
+          // Avoid trimming space around non-block, non-BR void elements and inline PRE.
           prevText = null;
-          prevVoid = true;
+          keepLeadingWs = true;
+        } else if (prevText) {
+          // Drop protection if set previously.
+          keepLeadingWs = false;
         }
@@ -583,5 +595,5 @@ } else {
     {
-      var domino = require('domino');
+      var domino$1 = domino;
       Parser.prototype.parseFromString = function (string) {
-        return domino.createDocument(string)
+        return domino$1.createDocument(string)
       };
@@ -594,3 +606,3 @@ }
 
-  function RootNode (input) {
+  function RootNode (input, options) {
     var root;
@@ -612,3 +624,4 @@ if (typeof input === 'string') {
       isBlock: isBlock,
-      isVoid: isVoid
+      isVoid: isVoid,
+      isPre: options.preformattedCode ? isPreOrCode : null
     });
@@ -625,7 +638,11 @@
 
-  function Node (node) {
+  function isPreOrCode (node) {
+    return node.nodeName === 'PRE' || node.nodeName === 'CODE'
+  }
+
+  function Node (node, options) {
     node.isBlock = isBlock(node);
-    node.isCode = node.nodeName.toLowerCase() === 'code' || node.parentNode.isCode;
+    node.isCode = node.nodeName === 'CODE' || node.parentNode.isCode;
     node.isBlank = isBlank(node);
-    node.flankingWhitespace = flankingWhitespace(node);
+    node.flankingWhitespace = flankingWhitespace(node, options);
     return node
@@ -644,24 +661,35 @@ }
 
-  function flankingWhitespace (node) {
-    var leading = '';
-    var trailing = '';
+  function flankingWhitespace (node, options) {
+    if (node.isBlock || (options.preformattedCode && node.isCode)) {
+      return { leading: '', trailing: '' }
+    }
 
-    if (!node.isBlock) {
-      var hasLeading = /^\s/.test(node.textContent);
-      var hasTrailing = /\s$/.test(node.textContent);
-      var blankWithSpaces = node.isBlank && hasLeading && hasTrailing;
+    var edges = edgeWhitespace(node.textContent);
 
-      if (hasLeading && !isFlankedByWhitespace('left', node)) {
-        leading = ' ';
-      }
+    // abandon leading ASCII WS if left-flanked by ASCII WS
+    if (edges.leadingAscii && isFlankedByWhitespace('left', node, options)) {
+      edges.leading = edges.leadingNonAscii;
+    }
 
-      if (!blankWithSpaces && hasTrailing && !isFlankedByWhitespace('right', node)) {
-        trailing = ' ';
-      }
+    // abandon trailing ASCII WS if right-flanked by ASCII WS
+    if (edges.trailingAscii && isFlankedByWhitespace('right', node, options)) {
+      edges.trailing = edges.trailingNonAscii;
     }
 
-    return { leading: leading, trailing: trailing }
+    return { leading: edges.leading, trailing: edges.trailing }
   }
 
-  function isFlankedByWhitespace (side, node) {
+  function edgeWhitespace (string) {
+    var m = string.match(/^(([ \t\r\n]*)(\s*))[\s\S]*?((\s*?)([ \t\r\n]*))$/);
+    return {
+      leading: m[1], // whole string for whitespace-only strings
+      leadingAscii: m[2],
+      leadingNonAscii: m[3],
+      trailing: m[4], // empty for whitespace-only strings
+      trailingNonAscii: m[5],
+      trailingAscii: m[6]
+    }
+  }
+
+  function isFlankedByWhitespace (side, node, options) {
     var sibling;
@@ -682,2 +710,4 @@ var regExp;
         isFlanked = regExp.test(sibling.nodeValue);
+      } else if (options.preformattedCode && sibling.nodeName === 'CODE') {
+        isFlanked = false;
       } else if (sibling.nodeType === 1 && !isBlock(sibling)) {
@@ -691,4 +721,2 @@ isFlanked = regExp.test(sibling.textContent);
   var reduce = Array.prototype.reduce;
-  var leadingNewLinesRegExp = /^\n*/;
-  var trailingNewLinesRegExp = /\n*$/;
   var escapes = [
@@ -725,2 +753,3 @@ [/\\/g, '\\\\'],
       br: '  ',
+      preformattedCode: false,
       blankReplacement: function (content, node) {
@@ -758,3 +787,3 @@ return node.isBlock ? '\n\n' : ''
 
-      var output = process.call(this, new RootNode(input));
+      var output = process.call(this, new RootNode(input, this.options));
       return postProcess.call(this, output)
@@ -848,3 +877,3 @@ },
     return reduce.call(parentNode.childNodes, function (output, node) {
-      node = new Node(node);
+      node = new Node(node, self.options);
 
@@ -902,27 +931,17 @@ var replacement = '';
   /**
-   * Determines the new lines between the current output and the replacement
+   * Joins replacement to the current output with appropriate number of new lines
    * @private
    * @param {String} output The current conversion output
    * @param {String} replacement The string to append to the output
-   * @returns The whitespace to separate the current output and the replacement
+   * @returns Joined output
    * @type String
    */
 
-  function separatingNewlines (output, replacement) {
-    var newlines = [
-      output.match(trailingNewLinesRegExp)[0],
-      replacement.match(leadingNewLinesRegExp)[0]
-    ].sort();
-    var maxNewlines = newlines[newlines.length - 1];
-    return maxNewlines.length < 2 ? maxNewlines : '\n\n'
-  }
+  function join (output, replacement) {
+    var s1 = trimTrailingNewlines(output);
+    var s2 = trimLeadingNewlines(replacement);
+    var nls = Math.max(output.length - s1.length, replacement.length - s2.length);
+    var separator = '\n\n'.substring(0, nls);
 
-  function join (string1, string2) {
-    var separator = separatingNewlines(string1, string2);
-
-    // Remove trailing/leading newlines and replace with separator
-    string1 = string1.replace(trailingNewLinesRegExp, '');
-    string2 = string2.replace(leadingNewLinesRegExp, '');
-
-    return string1 + separator + string2
+    return s1 + separator + s2
   }
@@ -929,0 +948,0 @@

package.json

 {
   "name": "turndown",
   "description": "A library that converts HTML to Markdown",
-  "version": "7.0.0",
+  "version": "7.1.0",
   "author": "Dom Christie",
@@ -10,3 +10,6 @@ "main": "lib/turndown.cjs.js",
   "browser": {
-    "domino": false
+    "domino": false,
+    "./lib/turndown.cjs.js": "./lib/turndown.browser.cjs.js",
+    "./lib/turndown.es.js": "./lib/turndown.browser.es.js",
+    "./lib/turndown.umd.js": "./lib/turndown.browser.umd.js"
   },
@@ -46,5 +49,5 @@ "dependencies": {
     "build-test": "browserify test/turndown-test.js --outfile test/turndown-test.browser.js",
-    "prepublish": "npm run build",
+    "prepare": "npm run build",
     "test": "npm run build && npm run build-test && standard ./src/**/*.js && node test/turndown-test.js"
   }
 }

README.md

@@ -7,3 +7,5 @@ # Turndown
 
-### to-markdown has been renamed to Turndown. See the [migration guide](https://github.com/domchristie/to-markdown/wiki/Migrating-from-to-markdown-to-Turndown) for details.
+## Project Updates
+* `to-markdown` has been renamed to Turndown. See the [migration guide](https://github.com/domchristie/to-markdown/wiki/Migrating-from-to-markdown-to-Turndown) for details.
+* Turndown repository has changed its URL to https://github.com/mixmark-io/turndown.
 
@@ -61,2 +63,3 @@ ## Installation
 | `linkReferenceStyle`  | `full`, `collapsed`, or `shortcut` | `full` |
+| `preformattedCode`    | `false` or [`true`](https://github.com/lucthev/collapse-whitespace/issues/16) | `false` |
 
@@ -63,0 +66,0 @@ ### Advanced Options

New alerts

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License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

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.

Found 1 instance in 1 package

Fixed alerts

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License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Improved metrics

Number of lines in readme file

233

increased by1.3%

Worsened metrics

Total package byte prevSize

191410

decreased by-44.85%

Number of package files

10

decreased by-41.18%

Lines of code

5703

decreased by-47.95%

Number of medium supply chain risk alerts

1

increased byInfinity%

No dependency changes