A JavaScript implementation of the W3C DOM.
$ npm install jsdomsee: mailing list
Bootstrapping a DOM is generally a difficult process involving many error prone steps. We didn't want jsdom to fall into the same trap and that is why a new method, jsdom.env(), has been added in jsdom 0.2.0 which should make everyone's lives easier.
with URL
// Count all of the links from the nodejs build page
var jsdom = require("jsdom");
jsdom.env(
"http://nodejs.org/dist/",
["http://code.jquery.com/jquery.js"],
function (errors, window) {
console.log("there have been", window.$("a").length, "nodejs releases!");
}
);or with raw HTML
// Run some jQuery on a html fragment
var jsdom = require("jsdom");
jsdom.env(
'<p><a class="the-link" href="https://github.com/tmpvar/jsdom">jsdom\'s Homepage</a></p>',
["http://code.jquery.com/jquery.js"],
function(errors, window) {
console.log("contents of a.the-link:", window.$("a.the-link").text());
}
);or with a configuration object
// Print all of the news items on hackernews
var jsdom = require("jsdom");
jsdom.env({
html: "http://news.ycombinator.com/",
scripts: ["http://code.jquery.com/jquery.js"],
done: function (errors, window) {
var $ = window.$;
console.log("HN Links");
$("td.title:not(:last) a").each(function() {
console.log(" -", $(this).text());
});
}
});or with raw JavaScript source
// Print all of the news items on hackernews
var jsdom = require("jsdom");
var fs = require("fs");
var jquery = fs.readFileSync("./jquery.js").toString();
jsdom.env({
html: "http://news.ycombinator.com/",
src: [jquery],
done: function (errors, window) {
var $ = window.$;
console.log("HN Links");
$("td.title:not(:last) a").each(function() {
console.log(" -", $(this).text());
});
}
});jsdom.env is built for ease of use, which is rare in the world of the DOM! Since the web has some absolutely horrible JavaScript on it, as of jsdom 0.2.0 jsdom.env will not process external resources (scripts, images, etc). If you want to process the JavaScript use one of the methods below (jsdom.jsdom or jsdom.jQueryify)
jsdom.env(html, [scripts], [config], callback);html(required): may be a URL, HTML fragment, or file.scripts(optional): may contain files or URLs.config(optional): see below.callback(required): takes two arguments:errors: an array of errorswindow: a brand new window
example:
jsdom.env(html, function (errors, window) {
// free memory associated with the window
window.close();
});If you would like to specify a configuration object only:
jsdom.env(config);config.html: seehtmlabove.config.scripts: seescriptsabove.config.src: an array of JavaScript strings that will be evaluated against the resulting document. Similar toscripts, but it accepts JavaScript instead of paths/URLs.config.done: seecallbackabove.config.document:referer: the new document will have this referercookie: manually set a cookie value, e.g.'key=value; expires=Wed, Sep 21 2011 12:00:00 GMT; path=/'
config.features: seeFlexibilitysection below. Note: the default feature set for jsdom.env does not include fetching remote JavaScript and executing it. This is something that you will need to carefully enable yourself.
If you want to spawn a document/window and specify all sorts of options this is the section for you. This section covers the jsdom.jsdom method:
var jsdom = require("jsdom").jsdom;
var doc = jsdom(markup, level, options);
var window = doc.createWindow();-
markupis an HTML/XML document to be parsed. You can also passnullor an undefined value to get a basic document with empty<head>and<body>tags. Document fragments are also supported (including""), and will behave as sanely as possible (e.g. the resulting document will lack thehead,bodyanddocumentElementproperties if the correspo C5C2 nding elements aren't included). -
levelisnull(which means level3) by default, but you can pass another level if you'd like.var jsdom = require("jsdom"); var doc = jsdom.jsdom("<html><body></body></html>", jsdom.level(1, "core"));
-
optionssee the Flexibility section below.
One of the goals of jsdom is to be as minimal and light as possible. This section details how someone can change the behavior of Documents on the fly. These features are baked into the DOMImplementation that every Document has, and may be tweaked in two ways:
- When you create a new
Documentusing the jsdom builder (require("jsdom").jsdom())
var jsdom = require("jsdom").jsdom;
var doc = jsdom("<html><body></body></html>", null, {
features: {
FetchExternalResources : ["img"]
}
});Do note, that this will only affect the document that is currently being created. All other documents will use the defaults specified below (see: Default Features).
- Before creating any documents, you can modify the defaults for all future documents:
require("jsdom").defaultDocumentFeatures = {
FetchExternalResources: ["script"],
ProcessExternalResources: false
};Default features are extremely important for jsdom as they lower the configuration requirement and present developers a set of consistent default behaviors. The following sections detail the available features, their defaults, and the values that jsdom uses.
FetchExternalResources
- Default:
["script"] - Allowed:
["script", "img", "css", "frame", "iframe", "link"]orfalse
Enables/disables fetching files over the file system/HTTP.
ProcessExternalResources
- Default:
["script"] - Allowed:
["script"]orfalse
Disabling this will disable script execution (currently only JavaScript).
SkipExternalResources
- Default:
false - Allowed:
/url to be skipped/orfalse - Example:
/http:\/\/example.org/js/bad\.js/
Do not download and process resources with url matching a regular expression.
jsdom includes support for using the canvas package to extend any <canvas> elements with the canvas API. To make this work, you need to include canvas as a dependency in your project, as a peer of jsdom. If jsdom can find the canvas package, it will use it, but if it's not present, then <canvas> elements will behave like <div>s.
var jsdom = require("jsdom");
var window = jsdom.createWindow();
console.log(window.document); // output: undefinedvar jsdom = require("jsdom");
var doc = new (jsdom.level(1, "core").Document)();
console.log(doc.nodeName); // outputs: #documentvar jsdom = require("jsdom").jsdom;
var document = jsdom("<html><head></head><body>hello world</body></html>");
var window = document.createWindow();
console.log(window.document.innerHTML);
// output: "<html><head></head><body>hello world</body></html>"
console.log(window.innerWidth);
// output: 1024
console.log(typeof window.document.getElementsByClassName);
// outputs: functionvar jsdom = require("jsdom");
var window = jsdom.jsdom().createWindow();
jsdom.jQueryify(window, "http://code.jquery.com/jquery.js", function () {
window.$("body").append('<div class="testing">Hello World, It works</div>');
console.log(window.$(".testing").text());
});var jsdom = require("jsdom").jsdom;
var window = jsdom().createWindow();
window.__myObject = { foo: "bar" };
var scriptEl = window.document.createElement("script");
scriptEl.src = "anotherScript.js";
window.document.body.appendChild(scriptEl);
// anotherScript.js will have the ability to read `window.__myObject`, even
// though it originated in Node! level1/core 532/532 100%
level1/html 238/238 100%
level1/svg 527/527 100%
level2/core 283/283 100%
level2/html 697/697 100%
level2/style 10/10 100%
level2/extra 4/4 100%
level2/events 24/24 100%
level3/xpath 93/93 100%
window/index 5/5 100%
window/script 10/10 100%
window/frame 14/14 100%
sizzle/index 9/14 64%
jsdom/index 86/86 100%
jsonp/jsonp 1/1 100%
browser/contextifyReplacement 4/4 100%
browser/index 22/22 100%
------------------------------------------------------
TOTALS: 5/2564 failed; 99% success
First you'll want to npm install. To run all the tests, use npm test, which just calls node test/runner.
Using test/runner directly, you can slice and dice which tests your want to run from different levels. Usage is as follows:
test/runner --help
Run the jsdom test suite
Options:
-s, --suites suites that you want to run. ie: -s level1/core,1/html,html [string]
-f, --fail-fast stop on the first failed test
-h, --help show the help
-t, --tests choose the test cases to run. ie: -t jquery