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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="https://unpkg.com/acorn/dist/acorn.js"></script>
<script src="https://unpkg.com/acorn-loose/dist/acorn-loose.js"></script>
<script src="https://unpkg.com/acorn-walk/dist/walk.js"></script>
<script src="//ternjs.net/doc/demo/polyfill.js"></script>
<script src="https://unpkg.com/tern/lib/signal.js"></script>
<script src="https://unpkg.com/tern/lib/tern.js"></script>
<script src="https://unpkg.com/tern/lib/def.js"></script>
<script src="https://unpkg.com/tern/lib/comment.js"></script>
<script src="https://unpkg.com/tern/lib/infer.js"></script>
<script src="https://unpkg.com/tern/plugin/doc_comment.js"></script>
<style>
.CodeMirror {border: 1px solid #ddd;}
</style>
<div id=nav>
<a href="https://codemirror.net/5"><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/codemirror5">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 of
the <a href="../addon/tern/tern.js">script</a> for a rough API
overview.</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("https://unpkg.com/tern/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>