Walter.js

Walter.js is a Javascript library that does all common things that you usually do when preload images. In this way Walter.js exports an easy Api based on Promises and events in wich you can subscribe for know the status of each image.

API

Preload one image

var promise = Walter('picture.jpg');

Preload multiple images

var promise = Walter(['picture1.jpg', 'picture2.jpg']);

Events

var promise = Walter(['picture1.jpg', 'picture2.jpg']);

//It's called when each image is loaded
promise.progress(function(index, img) {
  console.log(index, img);
});

//It's called when all images are loaded
promise.then(function(images) {
  console.log('then', images);
});

//It's called if some image has error
promise.catch(function(promise) {
  console.log('catch', promise);
});

Chaining

You can also use Walter.js with chain style

promise.then(onComplete).catch(onError).progress(onUpdate);

Config

Walter.config({
  path: 'assets/images'
});

Dependencies

None :D

How to Run Unit Tests

• npm install
• grunt test

TODO

• Add RSVP library for support old browsers
• Document code