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JavaScript is all like "You images done yet or what?"

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imagesLoaded

JavaScript is all like "You images done yet or what?"

imagesloaded.desandro.com

Detect when images have been loaded.

Install

Get a packaged source file:

Or install via Bower:

bower install imagesloaded

Or install via Component:

component install desandro/imagesloaded

Usage

imagesLoaded( elem, callback )
// you can use `new` if you like
new imagesLoaded( elem, callback )
  • elem Element, NodeList, Array, or Selector String
  • callback Function - function triggered after all images have been loaded

Using a callback function is the same as binding it to the always event (see below).

// element
imagesLoaded( document.querySelector('#container'), function( instance ) {
  console.log('all images are loaded');
});
// selector string
imagesLoaded( '#container', function() {...});
// multiple elements
var posts = document.querySelectorAll('.post');
imagesLoaded( posts, function() {...});

Events

imagesLoaded is an Event Emitter. You can bind event listeners to events.

var imgLoad = imagesLoaded( elem );
function onAlways( instance ) {
  console.log('all images are loaded');
}
// bind with .on()
imgLoad.on( 'always', onAlways );
// unbind with .off()
imgLoad.off( 'always', onAlways );

always

imgLoad.on( 'always', function( instance ) {
  console.log('ALWAYS - all images have been loaded');
});

Triggered after all images have been either loaded or confirmed broken.

  • instance imagesLoaded - the imagesLoaded instance

done

imgLoad.on( 'done', function( instance ) {
  console.log('DONE  - all images have been successfully loaded');
});

Triggered after all images have successfully loaded without any broken images.

fail

imgLoad.on( 'fail', function( instance ) {
  console.log('FAIL - all images loaded, at least one is broken');
});

Triggered after all images have been loaded with at least one broken image.

progress

imgLoad.on( 'progress', function( instance, image ) {
  var result = image.isLoaded ? 'loaded' : 'broken';
  console.log( 'image is ' + result + ' for ' + image.img.src );
});

Triggered after each image has been loaded.

  • instance imagesLoaded - the imagesLoaded instance
  • image LoadingImage - the LoadingImage instance of the loaded image

Properties

LoadingImage.img

Image - The img element

LoadingImage.isLoaded

Boolean - true when the image has succesfully loaded

imagesLoaded.images

Array of LoadingImage instances for each image detected

var imgLoad = imagesLoaded('#container');
imgLoad.on( 'always', function() {
  console.log( imgLoad.images.length + ' images loaded' );
  // detect which image is broken
  for ( var i = 0, len = imgLoad.images.length; i < len; i++ ) {
    var image = imgLoad.images[i];
    var result = image.isLoaded ? 'loaded' : 'broken';
    console.log( 'image is ' + result + ' for ' + image.img.src );
  }
});

jQuery

If you include jQuery, imagesLoaded can be used as a jQuery Plugin.

$('#container').imagesLoaded( function() {
  // images have loaded
});

jQuery Deferred

The jQuery plugin returns a jQuery Deferred object. This allows you to use .always(), .done(), .fail() and .progress(), similarly to the emitted events.

$('#container').imagesLoaded()
  .always( function( instance ) {
    console.log('all images loaded');
  })
  .done( function( instance ) {
    console.log('all images successfully loaded');
  })
  .fail( function() {
    console.log('all images loaded, at least one is broken');
  })
  .progress( function( instance, image ) {
    var result = image.isLoaded ? 'loaded' : 'broken';
    console.log( 'image is ' + result + ' for ' + image.img.src );
  });

RequireJS

imagesLoaded works with RequireJS.

You can require imagesloaded.pkgd.js.

requirejs( [
  'path/to/imagesloaded.pkgd.js',
], function( imagesLoaded ) {
  imagesLoaded( '#container', function() { ... });
});

Or, you can manage dependencies with Bower. Set baseUrl to bower_components and set a path config for all your application code.

requirejs.config({
  baseUrl: 'bower_components/',
  paths: { // path to your app
    app: '../'
  }
});

requirejs( [
  'imagesloaded/imagesloaded',
  'app/my-component.js'
], function( imagesLoaded, myComp ) {
  imagesLoaded( '#container', function() { ... });
});

Contributors

This project has a storied legacy. Its current incarnation was developed by Tomas Sardyha @Darsain and David DeSandro @desandro.

MIT License

imagesLoaded is released under the MIT License. Have at it.

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