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<a class=active href="#">JavaScript</a>
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<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 < 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 && 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 && consume !== false) this.pos += match[0].length; return match; } } }; </textarea>
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{
lineNumbers: true,
matchBrackets: true,
continueComments: "Enter",
extraKeys:
{
"Ctrl-Q": "toggleComment"
}
});
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<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>