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<!doctype html>
<title>CodeMirror: JavaScript mode</title>
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            <a href="../index.html">Language modes</a>
            <li>
                <a class=active href="#">JavaScript</a>
    </ul>
</div>
<article>
    <h2>JavaScript mode</h2>
    <div>
        <textarea id="code" name="code"> // Demo code (the actual new parser character stream implementation) function StringStream(string) { this.pos = 0; this.string = string; } StringStream.prototype = { done: function() {return this.pos >= this.string.length;}, peek: function() {return
            this.string.charAt(this.pos);}, next: function() { if (this.pos &lt; this.string.length) return this.string.charAt(this.pos++); }, eat: function(match) { var ch = this.string.charAt(this.pos); if (typeof match == "string") var ok = ch == match;
            else var ok = ch &amp;&amp; match.test ? match.test(ch) : match(ch); if (ok) {this.pos++; return ch;} }, eatWhile: function(match) { var start = this.pos; while (this.eat(match)); if (this.pos > start) return this.string.slice(start, this.pos);
            }, backUp: function(n) {this.pos -= n;}, column: function() {return this.pos;}, eatSpace: function() { var start = this.pos; while (/\s/.test(this.string.charAt(this.pos))) this.pos++; return this.pos - start; }, match: function(pattern, consume,
            caseInsensitive) { if (typeof pattern == "string") { function cased(str) {return caseInsensitive ? str.toLowerCase() : str;} if (cased(this.string).indexOf(cased(pattern), this.pos) == this.pos) { if (consume !== false) this.pos += str.length;
            return true; } } else { var match = this.string.slice(this.pos).match(pattern); if (match &amp;&amp; consume !== false) this.pos += match[0].length; return match; } } }; </textarea>
    </div>
    <script>
        var editor = CodeMirror.fromTextArea(document.getElementById("code"),
        {
            lineNumbers: true,
            matchBrackets: true,
            continueComments: "Enter",
            extraKeys:
            {
                "Ctrl-Q": "toggleComment"
            }
        });
    </script>
    <p> JavaScript mode supports several configuration options:
        <ul>
            <li><code>json</code> which will set the mode to expect JSON data rather than a JavaScript program.</li>
            <li><code>jsonld</code> which will set the mode to expect
                <a href="http://json-ld.org">JSON-LD</a> linked data rather than a JavaScript program (
                <a href="json-ld.html">demo</a>).</li>
            <li><code>typescript</code> which will activate additional syntax highlighting and some other things for TypeScript code (
                <a href="typescript.html">demo</a>).</li>
            <li><code>statementIndent</code> which (given a number) will determine the amount of indentation to use for statements continued on a new line.</li>
            <li><code>wordCharacters</code>, a regexp that indicates which characters should be considered part of an identifier. Defaults to <code>/[\w$]/</code>, which does not handle non-ASCII identifiers. Can be set to something more elaborate to improve
                Unicode support.</li>
        </ul>
    </p>
    <p>
        <strong>MIME types defined:</strong> <code>text/javascript</code>, <code>application/json</code>, <code>application/ld+json</code>, <code>text/typescript</code>, <code>application/typescript</code>.</p>
</article>