ConditionerJS

ConditionerJS is a javascript library for loading and unloading behavior based on environment conditions.

Environment Aware

Conditioner automatically loads and unloads modules based on the state of their surroundings. You define the required state, conditioner takes it from there.

Frizz Free

Modules loaded with Conditioner live on their own little islands. Conditioner exposes an API to facilitate safe communication between modules.

Demo

Suppose you have a Google Maps module which transforms an anchor to a full blown Google Map. It would make sense to only activate the maps module if there's enough real estate on the screen to render a decent sized map. And to save a request and some bits and bytes you might only want to start loading the map once the map container becomes visible to the user.

The following HTML snippet shows how to setup this Google Map using Conditioner. There's two things going on, the Map module is bound using the data-module attribute and the required conditions are set via the data-conditions attribute.

<a href="http://maps.google.com/?ll=51.741,3.822"
   data-module="ui/Map"
   data-conditions="media:{(min-width:40em)} and element:{was visible}"> ... </a>

Now the HTML is setup, we only have to tell Conditioner to look for modules in a certain section of the DOM and we're done.

We can accomplish this by calling the init method.

conditioner.init();

Some more demos can be found in the examples section of the documentation.

Articles

• Frizz Free JavaScript With ConditionerJS

Documentation

You can find the API documentation and a selection of demos at conditionerjs.com

Requirements

Conditioner expects an AMD loader to be available. It's been tested with RequireJS, Almond and Curl. As long as your AMD loader follows the AMD spec it should be fine.

If you're not into AMD and prefer Browserify that's fine too but keep in mind that your optimized file should contain all modules. If you want the best of both worlds you might be interested in WebPack.

• AMD Loader / CommonJS Preprocessor
• Modern browser, IE8 is supported but requires a bit of shimming.

History

1.1.0

• The supported property has been added which is used to determine if a module can be loaded at all.
• Improved getModule method API
• Constructor now set when extending a module
• Performance optimisations

1.0.1

• Fixed memory leaks

1.0.0

• Bind multiple modules to the same DOM node.
• New was statement to make tests sticky element:{was visible}.
• Alternative more human readable option format data-options=“map.zoom:10, map.type:terrain”.
• Support for other AMD loaders, if you follow AMD specs you should be fine.
• Browserify support, for conditional loading you'll still need an AMD loader though.
• Separate loading state attribute for binding CSS loading animations.
• Configure the paths and attributes Conditioner uses.
• getModule and getModules methods to access moduleControllers more directly.
• New is and on methods for manually testing conditions once or continually.
• destroy method to destroy previously initialised nodes.
• Writing your own monitors is now a lot easier.
• Fixes and small improvements.

Read the 1.0.0 closed issue list for a complete overview.

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License

MIT