Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP

Enables asynchronous Javascript execution in ExecJS

branch: master

Fetching latest commit…

Octocat-spinner-32-eaf2f5

Cannot retrieve the latest commit at this time

Octocat-spinner-32 lib
Octocat-spinner-32 test
Octocat-spinner-32 .gitignore
Octocat-spinner-32 .rvmrc
Octocat-spinner-32 Gemfile
Octocat-spinner-32 Gemfile.lock
Octocat-spinner-32 README.md
Octocat-spinner-32 Rakefile
Octocat-spinner-32 execjs-async.gemspec
README.md

ExecJS Async

ExecJS lets you run JavaScript code from Ruby. ExecJS Async allows you to execute, and receive results from, asynchronous javascript.

ExecJS Async supports these runtimes (will try to support more in the future, but this is an early release):

A short example:

require "execjs-async"
context = ExecJS.compile_async <<-JAVASCRIPT
  var run = function(html, code){
    var jsdom = require('jsdom');

    jsdom.env(html, function(errors, window) {
      callback(window.document.getElementByName('body').innerHTML);
    });
  }
JAVASCRIPT
context.call 'run', "<p>Hello World</p>"
# => "<p>Hello World</p>"

Notice the "callback" call in the compiled javascript code above. The object passed into this callback will be the result of context#call. Without ExecJS Async you would not be able to get back 'window.document.getElementByName('body').innerHTML' because jsdom.env is asynchronous. And since more and more js libs are being written asynchronously these days (thanks to the popularity of node.js), it would make sense to support it in ExecJS (even if it's hard to support it across runtimes)

Even though ExecJS supports just calling ExecJS.eval or ExecJS.exec, async only supports using ExecJS.compile_async, because that is how it is currently being used.

Installation

$ gem install execjs-async

License

Copyright (c) 2011 Eric Allam.

ExecJS is maintained by Sam Stephenson and Josh Peek.

Released under the MIT license.

Something went wrong with that request. Please try again.