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58 lines
1.7 KiB
58 lines
1.7 KiB
<!doctype html> |
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<title>CodeMirror: Mode-Changing Demo</title> |
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<meta charset="utf-8"/> |
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<link rel=stylesheet href="../doc/docs.css"> |
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<link rel="stylesheet" href="../lib/codemirror.css"> |
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<script src="../lib/codemirror.js"></script> |
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<script src="../mode/javascript/javascript.js"></script> |
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<script src="../mode/scheme/scheme.js"></script> |
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<style> |
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.CodeMirror {border: 1px solid black;} |
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</style> |
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<div id=nav> |
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<a href="https://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../doc/logo.png"></a> |
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<ul> |
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<li><a href="../index.html">Home</a> |
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<li><a href="../doc/manual.html">Manual</a> |
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<li><a href="https://github.com/codemirror/codemirror">Code</a> |
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</ul> |
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<ul> |
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<li><a class=active href="#">Mode-Changing</a> |
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</ul> |
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</div> |
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<article> |
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<h2>Mode-Changing Demo</h2> |
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<form><textarea id="code" name="code"> |
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;; If there is Scheme code in here, the editor will be in Scheme mode. |
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;; If you put in JS instead, it'll switch to JS mode. |
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(define (double x) |
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(* x x)) |
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</textarea></form> |
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<p>On changes to the content of the above editor, a (crude) script |
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tries to auto-detect the language used, and switches the editor to |
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either JavaScript or Scheme mode based on that.</p> |
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<script> |
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var editor = CodeMirror.fromTextArea(document.getElementById("code"), { |
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mode: "scheme", |
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lineNumbers: true |
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}); |
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var pending; |
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editor.on("change", function() { |
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clearTimeout(pending); |
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pending = setTimeout(update, 400); |
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}); |
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function looksLikeScheme(code) { |
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return !/^\s*\(\s*function\b/.test(code) && /^\s*[;\(]/.test(code); |
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} |
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function update() { |
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editor.setOption("mode", looksLikeScheme(editor.getValue()) ? "scheme" : "javascript"); |
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} |
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</script> |
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</article>
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