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1 <!doctype html>
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2
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3 <title>CodeMirror: Tern Demo</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 <link rel="stylesheet" href="../addon/dialog/dialog.css">
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9 <link rel="stylesheet" href="../addon/hint/show-hint.css">
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10 <link rel="stylesheet" href="../addon/tern/tern.css">
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11 <script src="../lib/codemirror.js"></script>
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12 <script src="../mode/javascript/javascript.js"></script>
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13 <script src="../addon/dialog/dialog.js"></script>
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14 <script src="../addon/hint/show-hint.js"></script>
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15 <script src="../addon/tern/tern.js"></script>
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16 <script src="https://unpkg.com/acorn/dist/acorn.js"></script>
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17 <script src="https://unpkg.com/acorn-loose/dist/acorn-loose.js"></script>
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18 <script src="https://unpkg.com/acorn-walk/dist/walk.js"></script>
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19 <script src="//ternjs.net/doc/demo/polyfill.js"></script>
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20 <script src="https://unpkg.com/tern/lib/signal.js"></script>
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21 <script src="https://unpkg.com/tern/lib/tern.js"></script>
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22 <script src="https://unpkg.com/tern/lib/def.js"></script>
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23 <script src="https://unpkg.com/tern/lib/comment.js"></script>
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24 <script src="https://unpkg.com/tern/lib/infer.js"></script>
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25 <script src="https://unpkg.com/tern/plugin/doc_comment.js"></script>
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26 <style>
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27 .CodeMirror {border: 1px solid #ddd;}
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28 </style>
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29 <div id=nav>
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30 <a href="https://codemirror.net/5"><h1>CodeMirror</h1><img id=logo src="../doc/logo.png"></a>
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31
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32 <ul>
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33 <li><a href="../index.html">Home</a>
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34 <li><a href="../doc/manual.html">Manual</a>
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35 <li><a href="https://github.com/codemirror/codemirror5">Code</a>
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36 </ul>
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37 <ul>
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38 <li><a class=active href="#">Tern</a>
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39 </ul>
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40 </div>
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41
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42 <article>
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43 <h2>Tern Demo</h2>
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44 <form><textarea id="code" name="code">// Use ctrl-space to complete something
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45 // Put the cursor in or after an expression, press ctrl-o to
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46 // find its type
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47
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48 var foo = ["array", "of", "strings"];
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49 var bar = foo.slice(0, 2).join("").split("a")[0];
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50
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51 // Works for locally defined types too.
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52
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53 function CTor() { this.size = 10; }
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54 CTor.prototype.hallo = "hallo";
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55
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56 var baz = new CTor;
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57 baz.
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58
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59 // You can press ctrl-q when the cursor is on a variable name to
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60 // rename it. Try it with CTor...
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61
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62 // When the cursor is in an argument list, the arguments are
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63 // shown below the editor.
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64
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65 [1].reduce( );
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66
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67 // And a little more advanced code...
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68
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69 (function(exports) {
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70 exports.randomElt = function(arr) {
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71 return arr[Math.floor(arr.length * Math.random())];
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72 };
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73 exports.strList = "foo".split("");
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74 exports.intList = exports.strList.map(function(s) { return s.charCodeAt(0); });
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75 })(window.myMod = {});
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76
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77 var randomStr = myMod.randomElt(myMod.strList);
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78 var randomInt = myMod.randomElt(myMod.intList);
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79 </textarea></form>
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80
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81 <p>Demonstrates integration of <a href="http://ternjs.net/">Tern</a>
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82 and CodeMirror. The following keys are bound:</p>
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83
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84 <dl>
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85 <dt>Ctrl-Space</dt><dd>Autocomplete</dd>
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86 <dt>Ctrl-O</dt><dd>Find docs for the expression at the cursor</dd>
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87 <dt>Ctrl-I</dt><dd>Find type at cursor</dd>
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88 <dt>Alt-.</dt><dd>Jump to definition (Alt-, to jump back)</dd>
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89 <dt>Ctrl-Q</dt><dd>Rename variable</dd>
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90 <dt>Ctrl-.</dt><dd>Select all occurrences of a variable</dd>
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91 </dl>
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92
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93 <p>Documentation is sparse for now. See the top of
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94 the <a href="../addon/tern/tern.js">script</a> for a rough API
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95 overview.</p>
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96
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97 <script>
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98 function getURL(url, c) {
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99 var xhr = new XMLHttpRequest();
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100 xhr.open("get", url, true);
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101 xhr.send();
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102 xhr.onreadystatechange = function() {
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103 if (xhr.readyState != 4) return;
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104 if (xhr.status < 400) return c(null, xhr.responseText);
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105 var e = new Error(xhr.responseText || "No response");
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106 e.status = xhr.status;
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107 c(e);
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108 };
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109 }
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110
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111 var server;
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112 getURL("https://unpkg.com/tern/defs/ecmascript.json", function(err, code) {
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113 if (err) throw new Error("Request for ecmascript.json: " + err);
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114 server = new CodeMirror.TernServer({defs: [JSON.parse(code)]});
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115 editor.setOption("extraKeys", {
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116 "Ctrl-Space": function(cm) { server.complete(cm); },
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117 "Ctrl-I": function(cm) { server.showType(cm); },
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118 "Ctrl-O": function(cm) { server.showDocs(cm); },
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119 "Alt-.": function(cm) { server.jumpToDef(cm); },
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120 "Alt-,": function(cm) { server.jumpBack(cm); },
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121 "Ctrl-Q": function(cm) { server.rename(cm); },
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122 "Ctrl-.": function(cm) { server.selectName(cm); }
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123 })
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124 editor.on("cursorActivity", function(cm) { server.updateArgHints(cm); });
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125 });
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126
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127 var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
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128 lineNumbers: true,
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129 mode: "javascript"
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130 });
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131 </script>
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132
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133 </article>
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