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Welcome

Inject (Apache Software License 2.0) is a revolutionary way to manage your dependencies in a Library Agnostic way. Some of its major features include:

  • CommonJS Compliance in the Browser (exports.*)
  • Cross domain retrieval of files (via easyXDM)
  • localStorage (load a module once)
  • Frustratingly Simple

Getting Started With Inject

This page is designed to get you up and running with the latest version of Inject. For greater detail, there is an Advanced Usage section, and a guide to the API.

Download Inject

The latest version of inject is always available via the source repository at http://www.injectjs.com/download/. The most recent version is usually at the top, and inside is the required JS and optional HTML files. Copy them to your own server.

As of 0.4.2, you can also get Inject as a Bower package via bower install inject. Our Bower repository can be found here.

Adding Inject to Your Page

This walkthrough is assuming you're using a directory called js which contains all of your javascript, possibly even this file. It also assumes inside of the js directory is a modules directory which will contain all of your modules. Your directory layout might look like the following:

|-index.html
|-relay.html (optional)
|-js
    |-inject.js
    |-modules
      |-math.js
      |-increment.js
      |-program.js

The location of the modules directory does not need to be under the inject.js file, but it's common practice to group files of similar types together such as JavaScript.

Starting Your JavaScript

To use inject, place the following script tags into the <head> of your document

<script type="text/javascript" src="inject.js"></script>
<script type="text/javascript">
  Inject.setModuleRoot("/js/modules");
  require.run("program");
</script>
  • Inject.setModuleRoot is the location of ALL your JS modules. Based on the directory structure above, they are located in the js/modules directory.
  • require.run executes your main entry point, whatever it may be. Given the above directory structure, it will run the program.js file in your module root (from require.setModuleRoot). The .js is added automatically.

Some Quick Configs

Here's some common configuration options you're going to want for Inject

// Set the "root" where all your modules can be found
// you can use an http:// path or just /path/to/modules like above
Inject.setModuleRoot("path");

// Specify how long files should be in localStorage (in minutes)
// or 0 for never, which is great for development
Inject.setExpires(integerValue);

// configure "cross domain" support. You need to put "relay.swf" and "relay.html"
// on your remote server for this to work
Inject.setModuleRoot("http://example-cdn.com/modules");
Inject.setCrossDomain({
  relayHtml: "http://example-cdn.com/relay.html",
});

Writing Some Modules

When you're ready to write your own modules, have a look at the CommonJS Module Examples to get started.

Building From Source

We have a whole section on building from source. Building From Source has all the juicy details.

Next Steps

From here, you can...

On The Shoulders of Giants

Inject couldn't be as great as it is without these other rockstar libraries:

  • easyXDM: Cross Domain Communication
  • lscache: LocalStorage Cache Provider
  • link.js: dependency extraction (from their src/Library/link.js)
  • GoWithTheFlow.js: simple flow control
  • (and a whole lot of npm related things for development)