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1 <!doctype html>
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2
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3 <title>CodeMirror: JavaScript mode</title>
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4 <meta charset="utf-8"/>
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5 <link rel=stylesheet href="../../doc/docs.css">
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6
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7 <link rel="stylesheet" href="../../lib/codemirror.css">
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8 <script src="../../lib/codemirror.js"></script>
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9 <script src="../../addon/edit/matchbrackets.js"></script>
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10 <script src="../../addon/comment/continuecomment.js"></script>
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11 <script src="../../addon/comment/comment.js"></script>
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12 <script src="javascript.js"></script>
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13 <style>.CodeMirror {border-top: 1px solid black; border-bottom: 1px solid black;}</style>
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14 <div id=nav>
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15 <a href="https://codemirror.net/5"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png" alt=""></a>
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16
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17 <ul>
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18 <li><a href="../../index.html">Home</a>
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19 <li><a href="../../doc/manual.html">Manual</a>
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20 <li><a href="https://github.com/codemirror/codemirror5">Code</a>
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21 </ul>
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22 <ul>
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23 <li><a href="../index.html">Language modes</a>
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24 <li><a class=active href="#">JavaScript</a>
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25 </ul>
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26 </div>
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27
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28 <article>
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29 <h2>JavaScript mode</h2>
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30
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31
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32 <div><textarea id="code" name="code">
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33 // Demo code (the actual new parser character stream implementation)
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34
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35 function StringStream(string) {
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36 this.pos = 0;
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37 this.string = string;
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38 }
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39
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40 StringStream.prototype = {
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41 done: function() {return this.pos >= this.string.length;},
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42 peek: function() {return this.string.charAt(this.pos);},
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43 next: function() {
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44 if (this.pos < this.string.length)
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45 return this.string.charAt(this.pos++);
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46 },
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47 eat: function(match) {
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48 var ch = this.string.charAt(this.pos);
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49 if (typeof match == "string") var ok = ch == match;
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50 else var ok = ch && match.test ? match.test(ch) : match(ch);
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51 if (ok) {this.pos++; return ch;}
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52 },
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53 eatWhile: function(match) {
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54 var start = this.pos;
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55 while (this.eat(match));
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56 if (this.pos > start) return this.string.slice(start, this.pos);
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57 },
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58 backUp: function(n) {this.pos -= n;},
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59 column: function() {return this.pos;},
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60 eatSpace: function() {
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61 var start = this.pos;
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62 while (/\s/.test(this.string.charAt(this.pos))) this.pos++;
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63 return this.pos - start;
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64 },
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65 match: function(pattern, consume, caseInsensitive) {
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66 if (typeof pattern == "string") {
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67 function cased(str) {return caseInsensitive ? str.toLowerCase() : str;}
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68 if (cased(this.string).indexOf(cased(pattern), this.pos) == this.pos) {
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69 if (consume !== false) this.pos += str.length;
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70 return true;
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71 }
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72 }
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73 else {
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74 var match = this.string.slice(this.pos).match(pattern);
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75 if (match && consume !== false) this.pos += match[0].length;
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76 return match;
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77 }
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78 }
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79 };
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80 </textarea></div>
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81
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82 <script>
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83 var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
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84 lineNumbers: true,
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85 matchBrackets: true,
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86 continueComments: "Enter",
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87 extraKeys: {"Ctrl-Q": "toggleComment"}
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88 });
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89 </script>
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90
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91 <p>
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92 JavaScript mode supports several configuration options:
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93 <ul>
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94 <li><code>json</code> which will set the mode to expect JSON
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95 data rather than a JavaScript program.</li>
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96 <li><code>jsonld</code> which will set the mode to expect
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97 <a href="http://json-ld.org">JSON-LD</a> linked data rather
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98 than a JavaScript program (<a href="json-ld.html">demo</a>).</li>
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99 <li><code>typescript</code> which will activate additional
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100 syntax highlighting and some other things for TypeScript code
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101 (<a href="typescript.html">demo</a>).</li>
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102 <li><code>trackScope</code> can be set to false to turn off
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103 tracking of local variables. This will prevent locals from
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104 getting the <code>"variable-2"</code> token type, and will
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105 break completion of locals with javascript-hint.</li>
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106 <li><code>statementIndent</code> which (given a number) will
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107 determine the amount of indentation to use for statements
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108 continued on a new line.</li>
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109 <li><code>wordCharacters</code>, a regexp that indicates which
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110 characters should be considered part of an identifier.
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111 Defaults to <code>/[\w$]/</code>, which does not handle
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112 non-ASCII identifiers. Can be set to something more elaborate
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113 to improve Unicode support.</li>
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114 </ul>
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115 </p>
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116
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117 <p><strong>MIME types defined:</strong> <code>text/javascript</code>, <code>application/javascript</code>, <code>application/x-javascript</code>, <code>text/ecmascript</code>, <code>application/ecmascript</code>, <code>application/json</code>, <code>application/x-json</code>, <code>application/manifest+json</code>, <code>application/ld+json</code>, <code>text/typescript</code>, <code>application/typescript</code>.</p>
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118 </article>
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