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<!doctype html>
<title>CodeMirror: Tern Demo</title><meta charset="utf-8"/><link rel=stylesheet href="../doc/docs.css">
<link rel="stylesheet" href="../lib/codemirror.css"><link rel="stylesheet" href="../addon/dialog/dialog.css"><link rel="stylesheet" href="../addon/hint/show-hint.css"><link rel="stylesheet" href="../addon/tern/tern.css"><script src="../lib/codemirror.js"></script><script src="../mode/javascript/javascript.js"></script><script src="../addon/dialog/dialog.js"></script><script src="../addon/hint/show-hint.js"></script><script src="../addon/tern/tern.js"></script><script src="//ternjs.net/node_modules/acorn/dist/acorn.js"></script><script src="//ternjs.net/node_modules/acorn-loose/dist/acorn-loose.js"></script><script src="//ternjs.net/node_modules/acorn-walk/dist/walk.js"></script><script src="//ternjs.net/doc/demo/polyfill.js"></script><script src="//ternjs.net/lib/signal.js"></script><script src="//ternjs.net/lib/tern.js"></script><script src="//ternjs.net/lib/def.js"></script><script src="//ternjs.net/lib/comment.js"></script><script src="//ternjs.net/lib/infer.js"></script><script src="//ternjs.net/plugin/doc_comment.js"></script><style> .CodeMirror {border: 1px solid #ddd;} </style><div id=nav> <a href="https://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../doc/logo.png"></a>
<ul> <li><a href="../index.html">Home</a> <li><a href="../doc/manual.html">Manual</a> <li><a href="https://github.com/codemirror/codemirror">Code</a> </ul> <ul> <li><a class=active href="#">Tern</a> </ul></div>
<article><h2>Tern Demo</h2><form><textarea id="code" name="code">// Use ctrl-space to complete something// Put the cursor in or after an expression, press ctrl-o to// find its type
var foo = ["array", "of", "strings"];var bar = foo.slice(0, 2).join("").split("a")[0];
// Works for locally defined types too.
function CTor() { this.size = 10; }CTor.prototype.hallo = "hallo";
var baz = new CTor;baz.
// You can press ctrl-q when the cursor is on a variable name to// rename it. Try it with CTor...
// When the cursor is in an argument list, the arguments are// shown below the editor.
[1].reduce( );
// And a little more advanced code...
(function(exports) { exports.randomElt = function(arr) { return arr[Math.floor(arr.length * Math.random())]; }; exports.strList = "foo".split(""); exports.intList = exports.strList.map(function(s) { return s.charCodeAt(0); });})(window.myMod = {});
var randomStr = myMod.randomElt(myMod.strList);var randomInt = myMod.randomElt(myMod.intList);</textarea></form>
<p>Demonstrates integration of <a href="http://ternjs.net/">Tern</a>and CodeMirror. The following keys are bound:</p>
<dl> <dt>Ctrl-Space</dt><dd>Autocomplete</dd> <dt>Ctrl-O</dt><dd>Find docs for the expression at the cursor</dd> <dt>Ctrl-I</dt><dd>Find type at cursor</dd> <dt>Alt-.</dt><dd>Jump to definition (Alt-, to jump back)</dd> <dt>Ctrl-Q</dt><dd>Rename variable</dd> <dt>Ctrl-.</dt><dd>Select all occurrences of a variable</dd></dl>
<p>Documentation is sparse for now. See the top ofthe <a href="../addon/tern/tern.js">script</a> for a rough APIoverview.</p>
<script> function getURL(url, c) { var xhr = new XMLHttpRequest(); xhr.open("get", url, true); xhr.send(); xhr.onreadystatechange = function() { if (xhr.readyState != 4) return; if (xhr.status < 400) return c(null, xhr.responseText); var e = new Error(xhr.responseText || "No response"); e.status = xhr.status; c(e); }; }
var server; getURL("//ternjs.net/defs/ecmascript.json", function(err, code) { if (err) throw new Error("Request for ecmascript.json: " + err); server = new CodeMirror.TernServer({defs: [JSON.parse(code)]}); editor.setOption("extraKeys", { "Ctrl-Space": function(cm) { server.complete(cm); }, "Ctrl-I": function(cm) { server.showType(cm); }, "Ctrl-O": function(cm) { server.showDocs(cm); }, "Alt-.": function(cm) { server.jumpToDef(cm); }, "Alt-,": function(cm) { server.jumpBack(cm); }, "Ctrl-Q": function(cm) { server.rename(cm); }, "Ctrl-.": function(cm) { server.selectName(cm); } }) editor.on("cursorActivity", function(cm) { server.updateArgHints(cm); }); });
var editor = CodeMirror.fromTextArea(document.getElementById("code"), { lineNumbers: true, mode: "javascript" });</script>
</article>
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