Node.js jsdom error

Question

I am trying to get jsdom to work :)

Here's the code:

var jsdom = require("jsdom");
var request = require("request");
var fs     = require('fs');
var jquery = fs.readFileSync("./jquery-1.7.2.js", 'utf-8');

request({ uri:'http://nodejs.org/dist/' }, function (error, response, body) {
    if (error && response.statusCode !== 200) {
        console.log('HTTP request error... '+error);
    }
    jsdom.env({
        html: body,
        scripts: [
            jquery
        ],
        done: function(errors, window) {
            console.log('done');
        }
    });
});

And here's the error:

jsdom.js:171
    features   = JSON.parse(JSON.stringify(window.document.implementation._fea
                                                          ^
TypeError: Cannot read property 'implementation' of undefined

I have checked if the page is fetched and if the jquery lib is parsed - they are.

We could look at the implementation of jsdom.js:

[snip]
exports.env = exports.jsdom.env = function() {
    [snip]
    window     = exports.html(html, null, options).createWindow(),
    features   = JSON.parse(JSON.stringify(window.document.implementation._features)),
    docsLoaded = 0,
    [snip]

It seems that the .createWindow() is not successful...

And I am running it on Cloud9.

Any help is welcome.

Answer 1

As reported at https://github.com/tmpvar/jsdom/issues/436, this can be caused by contextify not being installed. In theory jsdom has a shim that allows it to work without having contextify which is why it has it listed as a optional rather than required module, but this shim seems to be broken (see https://github.com/tmpvar/jsdom/issues/456).

So as of right now you need to get contextify installed to use the latest jsdom. Depending on your OS and environment there are several reasons that could be a problem. Run npm install contextify and then track down that issue.

Things to try depending on what your root issue is: - Verify you have Python 2.7 or greater and optimally 2.7.3 installed. Also verify its the one that gets run when you type python --version and that your PYTHONPATH is correct. - sudo npm install contextify - npm cache clean; npm install contextify --force