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CodeMirror: Code Folding Demo in CSS Editor 7

Demonstration of code folding using the code in foldcode.js. Press ctrl-q or click on the gutter to fold a block, again to unfold.

JavaScript:
HTML:

File

lib/codemirror-3.11/demo/folding.html
View source 
<!doctype html>
<html>
  <head>
    <meta charset="utf-8">
    <title>CodeMirror: Code Folding Demo</title>
    <link rel="stylesheet" href="../lib/codemirror.css">
    <script src="../lib/codemirror.js"></script>
    <script src="../addon/fold/foldcode.js"></script>
    <script src="../addon/fold/brace-fold.js"></script>
    <script src="../addon/fold/xml-fold.js"></script>
    <script src="../mode/javascript/javascript.js"></script>
    <script src="../mode/xml/xml.js"></script>
    <link rel="stylesheet" href="../doc/docs.css">

    <style type="text/css">
      .CodeMirror {border-top: 1px solid black; border-bottom: 1px solid black;}
      .CodeMirror-foldmarker {
        color: blue;
        text-shadow: #b9f 1px 1px 2px, #b9f -1px -1px 2px, #b9f 1px -1px 2px, #b9f -1px 1px 2px;
        font-family: arial;
        line-height: .3;
        cursor: pointer;
      }
    </style>
  </head>
  <body>
    <h1>CodeMirror: Code Folding Demo</h1>

    <p>Demonstration of code folding using the code
    in <a href="../addon/fold/foldcode.js"><code>foldcode.js</code></a>.
    Press ctrl-q or click on the gutter to fold a block, again
    to unfold.</p>
    <form>
      <div style="max-width: 50em; margin-bottom: 1em">JavaScript:<br><textarea id="code" name="code"></textarea></div>
      <div style="max-width: 50em">HTML:<br><textarea id="code-html" name="code-html"></textarea></div>
    </form>
    <script id="script">
window.onload = function() {
  var te = document.getElementById("code");
  var sc = document.getElementById("script");
  te.value = (sc.textContent || sc.innerText || sc.innerHTML).replace(/^\s*/, "");
  sc.innerHTML = "";
  var te_html = document.getElementById("code-html");
  te_html.value = "<html>\n  " + document.documentElement.innerHTML + "\n</html>";

  var foldFunc = CodeMirror.newFoldFunction(CodeMirror.braceRangeFinder);
  window.editor = CodeMirror.fromTextArea(te, {
    mode: "javascript",
    lineNumbers: true,
    lineWrapping: true,
    extraKeys: {"Ctrl-Q": function(cm){foldFunc(cm, cm.getCursor().line);}}
  });
  editor.on("gutterClick", foldFunc);
  foldFunc(editor, 9);

  var foldFunc_html = CodeMirror.newFoldFunction(CodeMirror.tagRangeFinder);
  window.editor_html = CodeMirror.fromTextArea(te_html, {
    mode: "text/html",
    lineNumbers: true,
    lineWrapping: true,
    extraKeys: {"Ctrl-Q": function(cm){foldFunc_html(cm, cm.getCursor().line);}}
  });
  editor_html.on("gutterClick", foldFunc_html);
  foldFunc_html(editor_html, 11);
  foldFunc_html(editor_html, 1);
};
</script>
  </body>
</html>