diff --git a/_locales/bg/messages.json b/_locales/bg/messages.json
index 5a2ea41a..4ddd011a 100644
--- a/_locales/bg/messages.json
+++ b/_locales/bg/messages.json
@@ -665,8 +665,8 @@
 		"description": "Go to Options UI"
 	},
 	"issuesHelp": {
-		"message": "Проблеми, намерени от <a href='https://stylelint.io/user-guide/rules/' target='_blank'>stylelint</a> при следните правила:",
-		"description": "Help popup message for the stylelint issues block on the style edit page"
+		"message": "Проблеми, намерени от $link$ при следните правила:",
+		"description": "Help popup message for the selected linter issues block on the style edit page"
 	},
 	"optionsCustomizeBadge": {
 		"message": "Значка на иконката на лентата",
diff --git a/_locales/cs/messages.json b/_locales/cs/messages.json
index 759179b2..15de1007 100644
--- a/_locales/cs/messages.json
+++ b/_locales/cs/messages.json
@@ -653,8 +653,8 @@
 		"description": "Go to Options UI"
 	},
 	"issuesHelp": {
-		"message": "Problémy nalezené aplikací <a href='https://stylelint.io/user-guide/rules/' target='_blank'>stylelint</a> s těmito povolenými pravidly:",
-		"description": "Help popup message for the stylelint issues block on the style edit page"
+		"message": "Problémy nalezené aplikací $link$ s těmito povolenými pravidly:",
+		"description": "Help popup message for the selected linter issues block on the style edit page"
 	},
 	"optionsCustomizeBadge": {
 		"message": "Ikona tlačítka na panelu",
diff --git a/_locales/de/messages.json b/_locales/de/messages.json
index 195760bf..fc8ed314 100644
--- a/_locales/de/messages.json
+++ b/_locales/de/messages.json
@@ -633,8 +633,8 @@
 		"description": "Go to Options UI"
 	},
 	"issuesHelp": {
-		"message": "Die von <a href='https://stylelint.io/user-guide/rules/' target='_blank'>stylelint</a> gefunden Fehler haben die folgenden Einstellungen:",
-		"description": "Help popup message for the stylelint issues block on the style edit page"
+		"message": "Die von $link$ gefunden Fehler haben die folgenden Einstellungen:",
+		"description": "Help popup message for the selected linter issues block on the style edit page"
 	},
 	"optionsCustomizeBadge": {
 		"message": "Badge auf dem Toolbar-Icon",
diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 06856b2b..96eeb115 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -135,6 +135,10 @@
     "message": "Double-click to maximize/restore the height",
     "description": "Tooltip for the resize grip in style editor"
   },
+  "cm_linter": {
+    "message": "CSS Linter",
+    "description": "Select the linter to check for CSS issues"
+  },
   "dysfunctional": {
     "message": "Stylus cannot function because Firefox is either in private mode or is applying its website cookies policy to IndexedDB storage used by Stylus, which erroneously marks the secure moz-extension:// origin as insecure even though WebExtensions aren't websites and Stylus doesn't use cookies.\n\n1. Open Firefox options\n2. Go to 'Privacy & Security'\n3. Set 'History' mode to 'Use custom settings'\n4. Click 'Exceptions'\n5. Paste our manifest URL and click 'Allow'\n6. Click 'Save settings'\n7. Uncheck 'Always use private browsing mode'\n\nThe actual manifest URL is shown below.\nYou can also find it on about:debugging page.",
     "description": "Displayed in Firefox when its settings make Stylus dysfunctional"
@@ -342,8 +346,13 @@
     "description": "Label for the stylelint issues block on the style edit page"
   },
   "issuesHelp": {
-    "message": "The issues found by <a href='https://stylelint.io/user-guide/rules/' target='_blank'>stylelint</a> with these rules enabled:",
-    "description": "Help popup message for the stylelint issues block on the style edit page"
+    "message": "The issues found by $link$ with these rules enabled:",
+    "description": "Help popup message for the selected linter issues block on the style edit page",
+    "placeholders": {
+      "link": {
+        "content": "$1"
+      }
+    }
   },
   "manageFilters": {
     "message": "Filters",
diff --git a/_locales/es/messages.json b/_locales/es/messages.json
index 713f97a1..7e9f0313 100644
--- a/_locales/es/messages.json
+++ b/_locales/es/messages.json
@@ -657,8 +657,8 @@
 		"description": "Go to Options UI"
 	},
 	"issuesHelp": {
-		"message": "Problemas encontrados por <a href='https://stylelint.io/user-guide/rules/' target='_blank'>stylelint</a> con estas reglas aplicadas:",
-		"description": "Help popup message for the stylelint issues block on the style edit page"
+		"message": "Problemas encontrados por $link$ con estas reglas aplicadas:",
+		"description": "Help popup message for the selected linter issues block on the style edit page"
 	},
 	"optionsCustomizeBadge": {
 		"message": "Distintivo en el icono de barra de herramientas",
diff --git a/_locales/et/messages.json b/_locales/et/messages.json
index 386fda0a..217de523 100644
--- a/_locales/et/messages.json
+++ b/_locales/et/messages.json
@@ -653,8 +653,8 @@
 		"description": "Go to Options UI"
 	},
 	"issuesHelp": {
-		"message": "<a href='https://stylelint.io/user-guide/rules/' target='_blank'>stylelint</a> poolt leitud vead nende lubatud reeglitega:",
-		"description": "Help popup message for the stylelint issues block on the style edit page"
+		"message": "$link$ poolt leitud vead nende lubatud reeglitega:",
+		"description": "Help popup message for the selected linter issues block on the style edit page"
 	},
 	"optionsCustomizeBadge": {
 		"message": "Number tööriistaribaikoonil",
diff --git a/_locales/ja/messages.json b/_locales/ja/messages.json
index bc87a044..d9d4be87 100644
--- a/_locales/ja/messages.json
+++ b/_locales/ja/messages.json
@@ -649,8 +649,8 @@
 		"description": "Go to Options UI"
 	},
 	"issuesHelp": {
-		"message": "これらのルールを有効にして <a href='https://stylelint.io/user-guide/rules/' target='_blank'>stylelint</a> で見つかった問題:",
-		"description": "Help popup message for the stylelint issues block on the style edit page"
+		"message": "これらのルールを有効にして $link$ で見つかった問題:",
+		"description": "Help popup message for the selected linter issues block on the style edit page"
 	},
 	"optionsCustomizeBadge": {
 		"message": "ツールバーアイコンのバッジ",
diff --git a/_locales/nl/messages.json b/_locales/nl/messages.json
index 47dd5dda..b28b2eb1 100644
--- a/_locales/nl/messages.json
+++ b/_locales/nl/messages.json
@@ -345,8 +345,8 @@
 		"description": "Label for the button to check all styles for updates"
 	},
 	"issuesHelp": {
-		"message": "De door stylelint gevonden problemen, <a href='https://stylelint.io/user-guide/rules/' target='_blank'>stylelint</a>, met deze ingeschakelde regels:",
-		"description": "Help popup message for the stylelint issues block on the style edit page"
+		"message": "De door stylelint gevonden problemen, $link$, met deze ingeschakelde regels:",
+		"description": "Help popup message for the selected linter issues block on the style edit page"
 	},
 	"confirmNo": {
 		"message": "Nee",
diff --git a/_locales/pl/messages.json b/_locales/pl/messages.json
index 6db9faec..71913b3e 100644
--- a/_locales/pl/messages.json
+++ b/_locales/pl/messages.json
@@ -657,8 +657,8 @@
 		"description": "Go to Options UI"
 	},
 	"issuesHelp": {
-		"message": "Problemy znalezione przez <a href='https://stylelint.io/user-guide/rules/' target='_blank'>stylelint</a> z tymi włączonymi regułami:",
-		"description": "Help popup message for the stylelint issues block on the style edit page"
+		"message": "Problemy znalezione przez $link$ z tymi włączonymi regułami:",
+		"description": "Help popup message for the selected linter issues block on the style edit page"
 	},
 	"optionsCustomizeBadge": {
 		"message": "Emblemat na ikonie paska narzędzi",
diff --git a/_locales/ru/messages.json b/_locales/ru/messages.json
index b6221834..28e438d1 100644
--- a/_locales/ru/messages.json
+++ b/_locales/ru/messages.json
@@ -657,8 +657,8 @@
 		"description": "Go to Options UI"
 	},
 	"issuesHelp": {
-		"message": "Проблемы и предупреждения по версии <a href='https://stylelint.io/user-guide/rules/' target='_blank'>stylelint</a> с данными включенными правилами:",
-		"description": "Help popup message for the stylelint issues block on the style edit page"
+		"message": "Проблемы и предупреждения по версии $link$ с данными включенными правилами:",
+		"description": "Help popup message for the selected linter issues block on the style edit page"
 	},
 	"optionsCustomizeBadge": {
 		"message": "Бейдж на пиктограмме в тулбаре",
diff --git a/_locales/sr/messages.json b/_locales/sr/messages.json
index c6b754f5..ef9bfbe9 100644
--- a/_locales/sr/messages.json
+++ b/_locales/sr/messages.json
@@ -357,8 +357,8 @@
 		"description": "Label for the button to check all styles for updates"
 	},
 	"issuesHelp": {
-		"message": "Проблем пронађен од стране <a href='https://stylelint.io/user-guide/rules/' target='_blank'>stylelint</a> са овим омогућеним правилима:",
-		"description": "Help popup message for the stylelint issues block on the style edit page"
+		"message": "Проблем пронађен од стране $link$ са овим омогућеним правилима:",
+		"description": "Help popup message for the selected linter issues block on the style edit page"
 	},
 	"confirmNo": {
 		"message": "Не",
diff --git a/_locales/zh_CN/messages.json b/_locales/zh_CN/messages.json
index e9e9b80d..2aa52306 100644
--- a/_locales/zh_CN/messages.json
+++ b/_locales/zh_CN/messages.json
@@ -657,8 +657,8 @@
 		"description": "Go to Options UI"
 	},
 	"issuesHelp": {
-		"message": "<a href='https://stylelint.io/user-guide/rules/' target='_blank'>stylelint</a> 在已启用的这些规则中找到问题：",
-		"description": "Help popup message for the stylelint issues block on the style edit page"
+		"message": "$link$ 在已启用的这些规则中找到问题：",
+		"description": "Help popup message for the selected linter issues block on the style edit page"
 	},
 	"optionsCustomizeBadge": {
 		"message": "样式计数器",
diff --git a/_locales/zh_TW/messages.json b/_locales/zh_TW/messages.json
index f6cb2703..409e48b8 100644
--- a/_locales/zh_TW/messages.json
+++ b/_locales/zh_TW/messages.json
@@ -661,8 +661,8 @@
 		"description": "Go to Options UI"
 	},
 	"issuesHelp": {
-		"message": "由<a href='https://stylelint.io/user-guide/rules/' target='_blank'>stylelint</a>發現啟用這些規則會產生衝突",
-		"description": "Help popup message for the stylelint issues block on the style edit page"
+		"message": "由$link$發現啟用這些規則會產生衝突",
+		"description": "Help popup message for the selected linter issues block on the style edit page"
 	},
 	"optionsCustomizeBadge": {
 		"message": "在工具列圖示上的徽章",
diff --git a/edit.html b/edit.html
index fc9b2558..f36ca5bc 100644
--- a/edit.html
+++ b/edit.html
@@ -35,9 +35,12 @@
 
     <link rel="stylesheet" href="vendor/codemirror/addon/lint/lint.css" />
     <script src="vendor/codemirror/addon/lint/lint.js"></script>
+    <script src="vendor-overwrites/codemirror/addon/lint/linter.js"></script>
+    <!-- CSSLint -->
+    <script src="vendor/csslint/csslint-worker.js"></script>
+    <!-- stylelint -->
     <script src="vendor-overwrites/stylelint/stylelint-bundle.min.js"></script>
     <script src="vendor-overwrites/codemirror/addon/lint/stylelint-config.js"></script>
-    <script src="vendor-overwrites/codemirror/addon/lint/stylelint.js"></script>
 
     <link rel="stylesheet" href="vendor/codemirror/addon/hint/show-hint.css" />
     <script src="vendor/codemirror/addon/hint/show-hint.js"></script>
@@ -187,6 +190,12 @@
             <option i18n-text="genericDisabledLabel" value="">
           </select>
         </div>
+        <div class="option aligned">
+          <label id="linter-label" for="editor.linter" i18n-text="cm_linter"></label>
+          <select id="editor.linter">
+            <option value="csslint" selected>CSSLint</option>
+            <option value="stylelint">stylelint</option>
+          </select>
       </section>
       <section id="lint"><h2 i18n-text="issues">: <span id="issue-count"></span><svg id="lint-help" class="svg-icon info"><use xlink:href="#svg-icon-help"/></svg></h2><div></div></section>
     </div>
diff --git a/edit/edit.js b/edit/edit.js
index 519f6940..b136f1be 100644
--- a/edit/edit.js
+++ b/edit/edit.js
@@ -1,5 +1,5 @@
 /* eslint brace-style: 0, operator-linebreak: 0 */
-/* global CodeMirror parserlib */
+/* global CodeMirror exports parserlib CSSLint */
 'use strict';
 
 let styleId = null;
@@ -348,6 +348,16 @@ function acmeEventListener(event) {
         default:
           value = null;
       }
+      break;
+    case 'linter':
+      if (value !== null && (editors.lastActive || editors[0])) {
+        if (prefs.get(el.id) !== value) {
+          prefs.set(el.id, value || 'csslint');
+        }
+        CodeMirror.signal(editors.lastActive || editors[0], "change");
+        // save();
+      }
+      break;
   }
   CodeMirror.setOption(option, value);
 }
@@ -1050,7 +1060,7 @@ function getEditorInSight(nearbyElement) {
 
 function updateLintReport(cm, delay) {
   if (delay === 0) {
-    // immediately show pending stylelint messages in onbeforeunload and save
+    // immediately show pending csslint/stylelint messages in onbeforeunload and save
     update(cm);
     return;
   }
@@ -1074,6 +1084,7 @@ function updateLintReport(cm, delay) {
     let changed = false;
     let fixedOldIssues = false;
     scope.forEach(cm => {
+      const linter = prefs.get('editor.linter');
       const scopedState = cm.state.lint || {};
       const oldMarkers = scopedState.markedLast || {};
       const newMarkers = {};
@@ -1082,17 +1093,19 @@ function updateLintReport(cm, delay) {
           const info = mark.__annotation;
           const isActiveLine = info.from.line === cm.getCursor().line;
           const pos = isActiveLine ? 'cursor' : (info.from.line + ',' + info.from.ch);
-          const rule = info.message.substring(info.message.lastIndexOf('('), info.message.length);
+          // stylelint rule added in parentheses at the end
+          const rule = linter === 'stylelint' ?
+            info.message.substring(info.message.lastIndexOf('('), info.message.length) :
+            / at line \d.+$/;
+          // csslint
           let message = escapeHtml(info.message.replace(rule, ''));
-          if (message.length > 100) {
-            message = message.substr(0, 100) + '...';
-          }
           if (isActiveLine || oldMarkers[pos] === message) {
             delete oldMarkers[pos];
           }
           newMarkers[pos] = message;
           return `<tr class="${info.severity}">
-            <td role="severity" class="CodeMirror-lint-marker-${info.severity}" title="Rule: ${rule}">
+            <td role="severity" class="CodeMirror-lint-marker-${info.severity}"
+              ${linter === 'stylelint' ? 'title="Rule: ' + rule + '"' : ''}>
               ${info.severity}
             </td>
             <td role="line">${info.from.line + 1}</td>
@@ -1100,7 +1113,7 @@ function updateLintReport(cm, delay) {
             <td role="col">${info.from.ch + 1}</td>
             <td role="message" title="${message}">${message}</td>
           </tr>`
-        }) + '</tbody>';
+        }).join('') + '</tbody>';
       scopedState.markedLast = newMarkers;
       fixedOldIssues |= scopedState.reportDisplayed && Object.keys(oldMarkers).length > 0;
       if (scopedState.html !== html) {
@@ -1866,17 +1879,25 @@ function showKeyMapHelp() {
 }
 
 function showLintHelp() {
-  let content = t('issuesHelp') + '<ul class="rules">',
-    rules = [];
-  $$('#lint td[role="severity"]').forEach(el => {
-    const rule = el.title.replace('Rule: (', '').replace(/[()]/g, '').trim();
-    if (!rules.includes(rule)) {
-      content += `<li>
-          <a target="_blank" href="https://stylelint.io/user-guide/rules/${rule}/">${rule}</a>
-        </li>`;
-      rules.push(rule);
-    }
-  });
+  let list = '<ul class="rules">';
+  let content = '';
+  if (prefs.get('editor.linter') === 'csslint') {
+    content = t('issuesHelp', '<a href="https://github.com/CSSLint/csslint" target="_blank">CSSLint</a>') + list +
+      CSSLint.getRules().map(rule =>
+        '<li><b>' + rule.name + '</b><br>' + rule.desc + '</li>'
+      ).join('');
+  } else {
+    let rules = [];
+    const url = 'https://stylelint.io/user-guide/rules/';
+    content = t('issuesHelp', `<a href="${url}" target="_blank">stylelint</a>`) + list;
+    $$('#lint td[role="severity"]').forEach(el => {
+      const rule = el.title.replace('Rule: (', '').replace(/[()]/g, '').trim();
+      if (!rules.includes(rule)) {
+        content += `<li><a target="_blank" href="${url}${rule}/">${rule}</a></li>`;
+        rules.push(rule);
+      }
+    });
+  }
   return showHelp(t('issues'), content + '</ul>');
 }
 
diff --git a/js/prefs.js b/js/prefs.js
index cad8b5f5..1359ec4d 100644
--- a/js/prefs.js
+++ b/js/prefs.js
@@ -42,6 +42,7 @@ var prefs = new function Prefs() {
       indent_conditional: true,
     },
     'editor.lintDelay': 500,        // lint gutter marker update delay, ms
+    'editor.linter': 'csslint',     // Choose csslint or stylelint
     'editor.lintReportDelay': 4500, // lint report update delay, ms
     'editor.matchHighlight': 'token', // token = token/word under cursor even if nothing is selected
                                       // selection = only when something is selected
diff --git a/vendor-overwrites/codemirror/addon/lint/css-lint.js b/vendor-overwrites/codemirror/addon/lint/css-lint.js
deleted file mode 100644
index e6f21682..00000000
--- a/vendor-overwrites/codemirror/addon/lint/css-lint.js
+++ /dev/null
@@ -1,64 +0,0 @@
-// CodeMirror, copyright (c) by Marijn Haverbeke and others
-// Distributed under an MIT license: http://codemirror.net/LICENSE
-
-// Depends on csslint.js from https://github.com/stubbornella/csslint
-
-// declare global: CSSLint
-
-(function(mod) {
-  if (typeof exports == "object" && typeof module == "object") // CommonJS
-    mod(require("../../lib/codemirror"));
-  else if (typeof define == "function" && define.amd) // AMD
-    define(["../../lib/codemirror"], mod);
-  else // Plain browser env
-    mod(CodeMirror);
-})(function(CodeMirror) {
-"use strict";
-
-CodeMirror.registerHelper("lint", "css", function(text) {
-  var found = [];
-  if (!window.CSSLint) return found;
-
-  /* STYLISH: hack start (part 1) */
-  var rules = CSSLint.getRules();
-  var allowedRules = ["display-property-grouping", "duplicate-properties", "empty-rules", "errors", "known-properties"];
-  CSSLint.clearRules();
-  rules.forEach(function(rule) {
-    if (allowedRules.indexOf(rule.id) >= 0) {
-      CSSLint.addRule(rule);
-    }
-  });
-  /* STYLISH: hack end */
-
-  var results = CSSLint.verify(text), messages = results.messages, message = null;
-  for ( var i = 0; i < messages.length; i++) {
-    message = messages[i];
-
-    /* STYLISH: hack start (part 2) */
-    if (message.type === 'warning') {
-       // @font-face {font-family: 'Ampersand'; unicode-range: U+26;}
-      if (message.message.indexOf('unicode-range') !== -1) {
-        continue;
-      }
-      else if ( // color: hsl(210, 100%, 2.2%); or color: hsla(210, 100%, 2.2%, 0.3);
-        message.message.startsWith('Expected (<color>) but found \'hsl') &&
-        /hsla?\(\s*(-?\d+)%?\s*,\s*(-?\d+)%\s*,\s*(-?\d+|-?\d*.\d+)%(\s*,\s*(-?\d+|-?\d*.\d+))?\s*\)/.test(message.message)
-      ) {
-        continue;
-      }
-      //
-    }
-    /* STYLISH: hack end */
-
-    var startLine = message.line -1, endLine = message.line -1, startCol = message.col -1, endCol = message.col;
-    found.push({
-      from: CodeMirror.Pos(startLine, startCol),
-      to: CodeMirror.Pos(endLine, endCol),
-      message: message.message,
-      severity : message.type
-    });
-  }
-  return found;
-});
-
-});
diff --git a/vendor-overwrites/codemirror/addon/lint/linter.js b/vendor-overwrites/codemirror/addon/lint/linter.js
new file mode 100644
index 00000000..fc156eea
--- /dev/null
+++ b/vendor-overwrites/codemirror/addon/lint/linter.js
@@ -0,0 +1,91 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+// Depends on csslint.js from https://github.com/stubbornella/csslint
+
+// declare global: CSSLint
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+"use strict";
+
+CodeMirror.registerHelper("lint", "css", function(text) {
+  let found = [];
+  const linter = prefs.get('editor.linter');
+  if (linter === 'csslint' && window.CSSLint) {
+
+    /* STYLISH: hack start (part 1) */
+    var rules = CSSLint.getRules();
+    var allowedRules = ["display-property-grouping", "duplicate-properties", "empty-rules", "errors", "known-properties"];
+    CSSLint.clearRules();
+    rules.forEach(function(rule) {
+      if (allowedRules.indexOf(rule.id) >= 0) {
+        CSSLint.addRule(rule);
+      }
+    });
+    /* STYLISH: hack end */
+
+    var results = CSSLint.verify(text), messages = results.messages, message = null;
+    for ( var i = 0; i < messages.length; i++) {
+      message = messages[i];
+
+      /* STYLISH: hack start (part 2) */
+      if (message.type === 'warning') {
+         // @font-face {font-family: 'Ampersand'; unicode-range: U+26;}
+        if (message.message.indexOf('unicode-range') !== -1) {
+          continue;
+        }
+        else if ( // color: hsl(210, 100%, 2.2%); or color: hsla(210, 100%, 2.2%, 0.3);
+          message.message.startsWith('Expected (<color>) but found \'hsl') &&
+          /hsla?\(\s*(-?\d+)%?\s*,\s*(-?\d+)%\s*,\s*(-?\d+|-?\d*.\d+)%(\s*,\s*(-?\d+|-?\d*.\d+))?\s*\)/.test(message.message)
+        ) {
+          continue;
+        }
+        //
+      }
+      /* STYLISH: hack end */
+
+      var startLine = message.line -1, endLine = message.line -1, startCol = message.col -1, endCol = message.col;
+      found.push({
+        from: CodeMirror.Pos(startLine, startCol),
+        to: CodeMirror.Pos(endLine, endCol),
+        message: message.message,
+        severity : message.type
+      });
+    }
+  } else if (linter === 'stylelint') {
+    const stylelint = require('stylelint').lint;
+    if (stylelint) {
+      return stylelint({
+          code: text,
+          // stylelintConfig stored in stylelint-config.js & loaded by edit.html
+          config: stylelintConfig
+        }).then(output => {
+          const warnings = output.results.length ? output.results[0].warnings : [],
+            len = warnings.length;
+          let i, warning;
+          if (len) {
+            for (i = 0; i < len; i++) {
+              warning = warnings[i];
+              found.push({
+                from: CodeMirror.Pos(warning.line - 1, warning.column - 1),
+                to: CodeMirror.Pos(warning.line - 1, warning.column),
+                message: warning.text,
+                severity : warning.severity
+              });
+            }
+          }
+          return found;
+        });
+    }
+  }
+  return found;
+});
+
+});
diff --git a/vendor-overwrites/codemirror/addon/lint/stylelint.js b/vendor-overwrites/codemirror/addon/lint/stylelint.js
deleted file mode 100644
index 7ddc45c2..00000000
--- a/vendor-overwrites/codemirror/addon/lint/stylelint.js
+++ /dev/null
@@ -1,49 +0,0 @@
-// CodeMirror, copyright (c) by Marijn Haverbeke and others
-// Distributed under an MIT license: http://codemirror.net/LICENSE
-
-// Depends on stylelint.js from https://github.com/...
-
-// declare global: StyleLint
-
-(function(mod) {
-  if (typeof exports == 'object' && typeof module == 'object') // CommonJS
-    mod(require('../../lib/codemirror'));
-  else if (typeof define == 'function' && define.amd) // AMD
-    define(['../../lib/codemirror'], mod);
-  else // Plain browser env
-    mod(CodeMirror);
-})(function(CodeMirror) {
-'use strict';
-
-CodeMirror.registerHelper('lint', 'css', text => {
-  let found = [];
-  const stylelint = require('stylelint').lint;
-
-  if (!stylelint) {
-    return found;
-  }
-
-  return stylelint({
-      code: text,
-      // stylelintConfig stored in stylelint-config.js & loaded by edit.html
-      config: stylelintConfig
-    }).then(output => {
-      const warnings = output.results.length ? output.results[0].warnings : [],
-        len = warnings.length;
-      let i, warning;
-      if (len) {
-        for (i = 0; i < len; i++) {
-          warning = warnings[i];
-          found.push({
-            from: CodeMirror.Pos(warning.line - 1, warning.column - 1),
-            to: CodeMirror.Pos(warning.line - 1, warning.column),
-            message: warning.text,
-            severity : warning.severity
-          });
-        }
-      }
-      return found;
-    });
-});
-
-});