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s-lnk
2026-04-30 21:58:39 +03:00
commit aabe5fe2b7
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/*!
* imagesLoaded v4.1.4
* JavaScript is all like "You images are done yet or what?"
* MIT License
*/
( function( window, factory ) { 'use strict';
// universal module definition
/*global define: false, module: false, require: false */
if ( typeof define == 'function' && define.amd ) {
// AMD
define( [
'ev-emitter/ev-emitter'
], function( EvEmitter ) {
return factory( window, EvEmitter );
});
} else if ( typeof module == 'object' && module.exports ) {
// CommonJS
module.exports = factory(
window,
require('ev-emitter')
);
} else {
// browser global
window.imagesLoaded = factory(
window,
window.EvEmitter
);
}
})( typeof window !== 'undefined' ? window : this,
// -------------------------- factory -------------------------- //
function factory( window, EvEmitter ) {
'use strict';
var $ = window.jQuery;
var console = window.console;
// -------------------------- helpers -------------------------- //
// extend objects
function extend( a, b ) {
for ( var prop in b ) {
a[ prop ] = b[ prop ];
}
return a;
}
var arraySlice = Array.prototype.slice;
// turn element or nodeList into an array
function makeArray( obj ) {
if ( Array.isArray( obj ) ) {
// use object if already an array
return obj;
}
var isArrayLike = typeof obj == 'object' && typeof obj.length == 'number';
if ( isArrayLike ) {
// convert nodeList to array
return arraySlice.call( obj );
}
// array of single index
return [ obj ];
}
// -------------------------- imagesLoaded -------------------------- //
/**
* @param {Array, Element, NodeList, String} elem
* @param {Object or Function} options - if function, use as callback
* @param {Function} onAlways - callback function
*/
function ImagesLoaded( elem, options, onAlways ) {
// coerce ImagesLoaded() without new, to be new ImagesLoaded()
if ( !( this instanceof ImagesLoaded ) ) {
return new ImagesLoaded( elem, options, onAlways );
}
// use elem as selector string
var queryElem = elem;
if ( typeof elem == 'string' ) {
queryElem = document.querySelectorAll( elem );
}
// bail if bad element
if ( !queryElem ) {
console.error( 'Bad element for imagesLoaded ' + ( queryElem || elem ) );
return;
}
this.elements = makeArray( queryElem );
this.options = extend( {}, this.options );
// shift arguments if no options set
if ( typeof options == 'function' ) {
onAlways = options;
} else {
extend( this.options, options );
}
if ( onAlways ) {
this.on( 'always', onAlways );
}
this.getImages();
if ( $ ) {
// add jQuery Deferred object
this.jqDeferred = new $.Deferred();
}
// HACK check async to allow time to bind listeners
setTimeout( this.check.bind( this ) );
}
ImagesLoaded.prototype = Object.create( EvEmitter.prototype );
ImagesLoaded.prototype.options = {};
ImagesLoaded.prototype.getImages = function() {
this.images = [];
// filter & find items if we have an item selector
this.elements.forEach( this.addElementImages, this );
};
/**
* @param {Node} element
*/
ImagesLoaded.prototype.addElementImages = function( elem ) {
// filter siblings
if ( elem.nodeName == 'IMG' ) {
this.addImage( elem );
}
// get background image on element
if ( this.options.background === true ) {
this.addElementBackgroundImages( elem );
}
// find children
// no non-element nodes, #143
var nodeType = elem.nodeType;
if ( !nodeType || !elementNodeTypes[ nodeType ] ) {
return;
}
var childImgs = elem.querySelectorAll('img');
// concat childElems to filterFound array
for ( var i=0; i < childImgs.length; i++ ) {
var img = childImgs[i];
this.addImage( img );
}
// get child background images
if ( typeof this.options.background == 'string' ) {
var children = elem.querySelectorAll( this.options.background );
for ( i=0; i < children.length; i++ ) {
var child = children[i];
this.addElementBackgroundImages( child );
}
}
};
var elementNodeTypes = {
1: true,
9: true,
11: true
};
ImagesLoaded.prototype.addElementBackgroundImages = function( elem ) {
var style = getComputedStyle( elem );
if ( !style ) {
// Firefox returns null if in a hidden iframe https://bugzil.la/548397
return;
}
// get url inside url("...")
var reURL = /url\((['"])?(.*?)\1\)/gi;
var matches = reURL.exec( style.backgroundImage );
while ( matches !== null ) {
var url = matches && matches[2];
if ( url ) {
this.addBackground( url, elem );
}
matches = reURL.exec( style.backgroundImage );
}
};
/**
* @param {Image} img
*/
ImagesLoaded.prototype.addImage = function( img ) {
var loadingImage = new LoadingImage( img );
this.images.push( loadingImage );
};
ImagesLoaded.prototype.addBackground = function( url, elem ) {
var background = new Background( url, elem );
this.images.push( background );
};
ImagesLoaded.prototype.check = function() {
var _this = this;
this.progressedCount = 0;
this.hasAnyBroken = false;
// complete if no images
if ( !this.images.length ) {
this.complete();
return;
}
function onProgress( image, elem, message ) {
// HACK - Chrome triggers event before object properties have changed. #83
setTimeout( function() {
_this.progress( image, elem, message );
});
}
this.images.forEach( function( loadingImage ) {
loadingImage.once( 'progress', onProgress );
loadingImage.check();
});
};
ImagesLoaded.prototype.progress = function( image, elem, message ) {
this.progressedCount++;
this.hasAnyBroken = this.hasAnyBroken || !image.isLoaded;
// progress event
this.emitEvent( 'progress', [ this, image, elem ] );
if ( this.jqDeferred && this.jqDeferred.notify ) {
this.jqDeferred.notify( this, image );
}
// check if completed
if ( this.progressedCount == this.images.length ) {
this.complete();
}
if ( this.options.debug && console ) {
console.log( 'progress: ' + message, image, elem );
}
};
ImagesLoaded.prototype.complete = function() {
var eventName = this.hasAnyBroken ? 'fail' : 'done';
this.isComplete = true;
this.emitEvent( eventName, [ this ] );
this.emitEvent( 'always', [ this ] );
if ( this.jqDeferred ) {
var jqMethod = this.hasAnyBroken ? 'reject' : 'resolve';
this.jqDeferred[ jqMethod ]( this );
}
};
// -------------------------- -------------------------- //
function LoadingImage( img ) {
this.img = img;
}
LoadingImage.prototype = Object.create( EvEmitter.prototype );
LoadingImage.prototype.check = function() {
// If complete is true and browser supports natural sizes,
// try to check for image status manually.
var isComplete = this.getIsImageComplete();
if ( isComplete ) {
// report based on naturalWidth
this.confirm( this.img.naturalWidth !== 0, 'naturalWidth' );
return;
}
// If none of the checks above matched, simulate loading on detached element.
this.proxyImage = new Image();
this.proxyImage.addEventListener( 'load', this );
this.proxyImage.addEventListener( 'error', this );
// bind to image as well for Firefox. #191
this.img.addEventListener( 'load', this );
this.img.addEventListener( 'error', this );
this.proxyImage.src = this.img.src;
};
LoadingImage.prototype.getIsImageComplete = function() {
// check for non-zero, non-undefined naturalWidth
// fixes Safari+InfiniteScroll+Masonry bug infinite-scroll#671
return this.img.complete && this.img.naturalWidth;
};
LoadingImage.prototype.confirm = function( isLoaded, message ) {
this.isLoaded = isLoaded;
this.emitEvent( 'progress', [ this, this.img, message ] );
};
// ----- events ----- //
// trigger specified handler for event type
LoadingImage.prototype.handleEvent = function( event ) {
var method = 'on' + event.type;
if ( this[ method ] ) {
this[ method ]( event );
}
};
LoadingImage.prototype.onload = function() {
this.confirm( true, 'onload' );
this.unbindEvents();
};
LoadingImage.prototype.onerror = function() {
this.confirm( false, 'onerror' );
this.unbindEvents();
};
LoadingImage.prototype.unbindEvents = function() {
this.proxyImage.removeEventListener( 'load', this );
this.proxyImage.removeEventListener( 'error', this );
this.img.removeEventListener( 'load', this );
this.img.removeEventListener( 'error', this );
};
// -------------------------- Background -------------------------- //
function Background( url, element ) {
this.url = url;
this.element = element;
this.img = new Image();
}
// inherit LoadingImage prototype
Background.prototype = Object.create( LoadingImage.prototype );
Background.prototype.check = function() {
this.img.addEventListener( 'load', this );
this.img.addEventListener( 'error', this );
this.img.src = this.url;
// check if image is already complete
var isComplete = this.getIsImageComplete();
if ( isComplete ) {
this.confirm( this.img.naturalWidth !== 0, 'naturalWidth' );
this.unbindEvents();
}
};
Background.prototype.unbindEvents = function() {
this.img.removeEventListener( 'load', this );
this.img.removeEventListener( 'error', this );
};
Background.prototype.confirm = function( isLoaded, message ) {
this.isLoaded = isLoaded;
this.emitEvent( 'progress', [ this, this.element, message ] );
};
// -------------------------- jQuery -------------------------- //
ImagesLoaded.makeJQueryPlugin = function( jQuery ) {
jQuery = jQuery || window.jQuery;
if ( !jQuery ) {
return;
}
// set local variable
$ = jQuery;
// $().imagesLoaded()
$.fn.imagesLoaded = function( options, callback ) {
var instance = new ImagesLoaded( this, options, callback );
return instance.jqDeferred.promise( $(this) );
};
};
// try making plugin
ImagesLoaded.makeJQueryPlugin();
// -------------------------- -------------------------- //
return ImagesLoaded;
});
@@ -0,0 +1,497 @@
/*!
* imagesLoaded PACKAGED v4.1.4
* JavaScript is all like "You images are done yet or what?"
* MIT License
*/
/**
* EvEmitter v1.1.0
* Lil' event emitter
* MIT License
*/
/* jshint unused: true, undef: true, strict: true */
( function( global, factory ) {
// universal module definition
/* jshint strict: false */ /* globals define, module, window */
if ( typeof define == 'function' && define.amd ) {
// AMD - RequireJS
define( 'ev-emitter/ev-emitter',factory );
} else if ( typeof module == 'object' && module.exports ) {
// CommonJS - Browserify, Webpack
module.exports = factory();
} else {
// Browser globals
global.EvEmitter = factory();
}
}( typeof window != 'undefined' ? window : this, function() {
function EvEmitter() {}
var proto = EvEmitter.prototype;
proto.on = function( eventName, listener ) {
if ( !eventName || !listener ) {
return;
}
// set events hash
var events = this._events = this._events || {};
// set listeners array
var listeners = events[ eventName ] = events[ eventName ] || [];
// only add once
if ( listeners.indexOf( listener ) == -1 ) {
listeners.push( listener );
}
return this;
};
proto.once = function( eventName, listener ) {
if ( !eventName || !listener ) {
return;
}
// add event
this.on( eventName, listener );
// set once flag
// set onceEvents hash
var onceEvents = this._onceEvents = this._onceEvents || {};
// set onceListeners object
var onceListeners = onceEvents[ eventName ] = onceEvents[ eventName ] || {};
// set flag
onceListeners[ listener ] = true;
return this;
};
proto.off = function( eventName, listener ) {
var listeners = this._events && this._events[ eventName ];
if ( !listeners || !listeners.length ) {
return;
}
var index = listeners.indexOf( listener );
if ( index != -1 ) {
listeners.splice( index, 1 );
}
return this;
};
proto.emitEvent = function( eventName, args ) {
var listeners = this._events && this._events[ eventName ];
if ( !listeners || !listeners.length ) {
return;
}
// copy over to avoid interference if .off() in listener
listeners = listeners.slice(0);
args = args || [];
// once stuff
var onceListeners = this._onceEvents && this._onceEvents[ eventName ];
for ( var i=0; i < listeners.length; i++ ) {
var listener = listeners[i]
var isOnce = onceListeners && onceListeners[ listener ];
if ( isOnce ) {
// remove listener
// remove before trigger to prevent recursion
this.off( eventName, listener );
// unset once flag
delete onceListeners[ listener ];
}
// trigger listener
listener.apply( this, args );
}
return this;
};
proto.allOff = function() {
delete this._events;
delete this._onceEvents;
};
return EvEmitter;
}));
/*!
* imagesLoaded v4.1.4
* JavaScript is all like "You images are done yet or what?"
* MIT License
*/
( function( window, factory ) { 'use strict';
// universal module definition
/*global define: false, module: false, require: false */
if ( typeof define == 'function' && define.amd ) {
// AMD
define( [
'ev-emitter/ev-emitter'
], function( EvEmitter ) {
return factory( window, EvEmitter );
});
} else if ( typeof module == 'object' && module.exports ) {
// CommonJS
module.exports = factory(
window,
require('ev-emitter')
);
} else {
// browser global
window.imagesLoaded = factory(
window,
window.EvEmitter
);
}
})( typeof window !== 'undefined' ? window : this,
// -------------------------- factory -------------------------- //
function factory( window, EvEmitter ) {
var $ = window.jQuery;
var console = window.console;
// -------------------------- helpers -------------------------- //
// extend objects
function extend( a, b ) {
for ( var prop in b ) {
a[ prop ] = b[ prop ];
}
return a;
}
var arraySlice = Array.prototype.slice;
// turn element or nodeList into an array
function makeArray( obj ) {
if ( Array.isArray( obj ) ) {
// use object if already an array
return obj;
}
var isArrayLike = typeof obj == 'object' && typeof obj.length == 'number';
if ( isArrayLike ) {
// convert nodeList to array
return arraySlice.call( obj );
}
// array of single index
return [ obj ];
}
// -------------------------- imagesLoaded -------------------------- //
/**
* @param {Array, Element, NodeList, String} elem
* @param {Object or Function} options - if function, use as callback
* @param {Function} onAlways - callback function
*/
function ImagesLoaded( elem, options, onAlways ) {
// coerce ImagesLoaded() without new, to be new ImagesLoaded()
if ( !( this instanceof ImagesLoaded ) ) {
return new ImagesLoaded( elem, options, onAlways );
}
// use elem as selector string
var queryElem = elem;
if ( typeof elem == 'string' ) {
queryElem = document.querySelectorAll( elem );
}
// bail if bad element
if ( !queryElem ) {
console.error( 'Bad element for imagesLoaded ' + ( queryElem || elem ) );
return;
}
this.elements = makeArray( queryElem );
this.options = extend( {}, this.options );
// shift arguments if no options set
if ( typeof options == 'function' ) {
onAlways = options;
} else {
extend( this.options, options );
}
if ( onAlways ) {
this.on( 'always', onAlways );
}
this.getImages();
if ( $ ) {
// add jQuery Deferred object
this.jqDeferred = new $.Deferred();
}
// HACK check async to allow time to bind listeners
setTimeout( this.check.bind( this ) );
}
ImagesLoaded.prototype = Object.create( EvEmitter.prototype );
ImagesLoaded.prototype.options = {};
ImagesLoaded.prototype.getImages = function() {
this.images = [];
// filter & find items if we have an item selector
this.elements.forEach( this.addElementImages, this );
};
/**
* @param {Node} element
*/
ImagesLoaded.prototype.addElementImages = function( elem ) {
// filter siblings
if ( elem.nodeName == 'IMG' ) {
this.addImage( elem );
}
// get background image on element
if ( this.options.background === true ) {
this.addElementBackgroundImages( elem );
}
// find children
// no non-element nodes, #143
var nodeType = elem.nodeType;
if ( !nodeType || !elementNodeTypes[ nodeType ] ) {
return;
}
var childImgs = elem.querySelectorAll('img');
// concat childElems to filterFound array
for ( var i=0; i < childImgs.length; i++ ) {
var img = childImgs[i];
this.addImage( img );
}
// get child background images
if ( typeof this.options.background == 'string' ) {
var children = elem.querySelectorAll( this.options.background );
for ( i=0; i < children.length; i++ ) {
var child = children[i];
this.addElementBackgroundImages( child );
}
}
};
var elementNodeTypes = {
1: true,
9: true,
11: true
};
ImagesLoaded.prototype.addElementBackgroundImages = function( elem ) {
var style = getComputedStyle( elem );
if ( !style ) {
// Firefox returns null if in a hidden iframe https://bugzil.la/548397
return;
}
// get url inside url("...")
var reURL = /url\((['"])?(.*?)\1\)/gi;
var matches = reURL.exec( style.backgroundImage );
while ( matches !== null ) {
var url = matches && matches[2];
if ( url ) {
this.addBackground( url, elem );
}
matches = reURL.exec( style.backgroundImage );
}
};
/**
* @param {Image} img
*/
ImagesLoaded.prototype.addImage = function( img ) {
var loadingImage = new LoadingImage( img );
this.images.push( loadingImage );
};
ImagesLoaded.prototype.addBackground = function( url, elem ) {
var background = new Background( url, elem );
this.images.push( background );
};
ImagesLoaded.prototype.check = function() {
var _this = this;
this.progressedCount = 0;
this.hasAnyBroken = false;
// complete if no images
if ( !this.images.length ) {
this.complete();
return;
}
function onProgress( image, elem, message ) {
// HACK - Chrome triggers event before object properties have changed. #83
setTimeout( function() {
_this.progress( image, elem, message );
});
}
this.images.forEach( function( loadingImage ) {
loadingImage.once( 'progress', onProgress );
loadingImage.check();
});
};
ImagesLoaded.prototype.progress = function( image, elem, message ) {
this.progressedCount++;
this.hasAnyBroken = this.hasAnyBroken || !image.isLoaded;
// progress event
this.emitEvent( 'progress', [ this, image, elem ] );
if ( this.jqDeferred && this.jqDeferred.notify ) {
this.jqDeferred.notify( this, image );
}
// check if completed
if ( this.progressedCount == this.images.length ) {
this.complete();
}
if ( this.options.debug && console ) {
console.log( 'progress: ' + message, image, elem );
}
};
ImagesLoaded.prototype.complete = function() {
var eventName = this.hasAnyBroken ? 'fail' : 'done';
this.isComplete = true;
this.emitEvent( eventName, [ this ] );
this.emitEvent( 'always', [ this ] );
if ( this.jqDeferred ) {
var jqMethod = this.hasAnyBroken ? 'reject' : 'resolve';
this.jqDeferred[ jqMethod ]( this );
}
};
// -------------------------- -------------------------- //
function LoadingImage( img ) {
this.img = img;
}
LoadingImage.prototype = Object.create( EvEmitter.prototype );
LoadingImage.prototype.check = function() {
// If complete is true and browser supports natural sizes,
// try to check for image status manually.
var isComplete = this.getIsImageComplete();
if ( isComplete ) {
// report based on naturalWidth
this.confirm( this.img.naturalWidth !== 0, 'naturalWidth' );
return;
}
// If none of the checks above matched, simulate loading on detached element.
this.proxyImage = new Image();
this.proxyImage.addEventListener( 'load', this );
this.proxyImage.addEventListener( 'error', this );
// bind to image as well for Firefox. #191
this.img.addEventListener( 'load', this );
this.img.addEventListener( 'error', this );
this.proxyImage.src = this.img.src;
};
LoadingImage.prototype.getIsImageComplete = function() {
// check for non-zero, non-undefined naturalWidth
// fixes Safari+InfiniteScroll+Masonry bug infinite-scroll#671
return this.img.complete && this.img.naturalWidth;
};
LoadingImage.prototype.confirm = function( isLoaded, message ) {
this.isLoaded = isLoaded;
this.emitEvent( 'progress', [ this, this.img, message ] );
};
// ----- events ----- //
// trigger specified handler for event type
LoadingImage.prototype.handleEvent = function( event ) {
var method = 'on' + event.type;
if ( this[ method ] ) {
this[ method ]( event );
}
};
LoadingImage.prototype.onload = function() {
this.confirm( true, 'onload' );
this.unbindEvents();
};
LoadingImage.prototype.onerror = function() {
this.confirm( false, 'onerror' );
this.unbindEvents();
};
LoadingImage.prototype.unbindEvents = function() {
this.proxyImage.removeEventListener( 'load', this );
this.proxyImage.removeEventListener( 'error', this );
this.img.removeEventListener( 'load', this );
this.img.removeEventListener( 'error', this );
};
// -------------------------- Background -------------------------- //
function Background( url, element ) {
this.url = url;
this.element = element;
this.img = new Image();
}
// inherit LoadingImage prototype
Background.prototype = Object.create( LoadingImage.prototype );
Background.prototype.check = function() {
this.img.addEventListener( 'load', this );
this.img.addEventListener( 'error', this );
this.img.src = this.url;
// check if image is already complete
var isComplete = this.getIsImageComplete();
if ( isComplete ) {
this.confirm( this.img.naturalWidth !== 0, 'naturalWidth' );
this.unbindEvents();
}
};
Background.prototype.unbindEvents = function() {
this.img.removeEventListener( 'load', this );
this.img.removeEventListener( 'error', this );
};
Background.prototype.confirm = function( isLoaded, message ) {
this.isLoaded = isLoaded;
this.emitEvent( 'progress', [ this, this.element, message ] );
};
// -------------------------- jQuery -------------------------- //
ImagesLoaded.makeJQueryPlugin = function( jQuery ) {
jQuery = jQuery || window.jQuery;
if ( !jQuery ) {
return;
}
// set local variable
$ = jQuery;
// $().imagesLoaded()
$.fn.imagesLoaded = function( options, callback ) {
var instance = new ImagesLoaded( this, options, callback );
return instance.jqDeferred.promise( $(this) );
};
};
// try making plugin
ImagesLoaded.makeJQueryPlugin();
// -------------------------- -------------------------- //
return ImagesLoaded;
});
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@@ -0,0 +1,29 @@
.box {
width: 300px;
height: 300px;
margin: 0 20px 20px 0;
border: 1px solid;
display: inline-block;
}
.orange-tree {
background: url('http://i.imgur.com/bwy74ok.jpg');
background-size: cover;
}
.thunder-cloud {
background: url('../../../test/img/thunder-cloud.jpg');
background-size: contain;
}
.multi1 {
background:
url("http://i.imgur.com/ZAVN3.png"),
url('http://i.imgur.com/6UdOxeB.png') bottom right,
url(http://i.imgur.com/LkmcILl.jpg);
background-size: cover;
}
.blue {
background: #09F;
}
@@ -0,0 +1,51 @@
<!doctype html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width" />
<title>background</title>
<!-- put in separate folder so JS path is different from CSS path -->
<link rel="stylesheet" href="css/background.css" >
</head>
<body>
<h1>background</h1>
<div class="box orange-tree"></div>
<div class="box thunder-cloud"></div>
<div class="box multi1"></div>
<div class="box blue"></div>
<script src="../../bower_components/ev-emitter/ev-emitter.js"></script>
<script src="../../imagesloaded.js"></script>
<script>
var imgLoad0 = imagesLoaded( '.orange-tree', { background: true }, function() {
console.log('orange tree bg images loaded', imgLoad0.images.length );
});
var imgLoad1 = imagesLoaded( '.thunder-cloud', { background: true }, function() {
console.log('thunder cloud bg images loaded', imgLoad1.images.length);
});
var imgLoad2 = imagesLoaded( '.multi1', { background: true }, function() {
console.log('multi1 bg images loaded', imgLoad2.images.length);
});
var imgLoad3 = imagesLoaded( '.box', { background: true }, function() {
console.log('.box bg images loaded', imgLoad3.images.length);
});
imgLoad3.on('progress', function( instance, image, element ) {
console.log( 'progress on .box', image.img.src, element.className );
});
</script>
</body>
</html>
@@ -0,0 +1,89 @@
<!doctype html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width" />
<title>progress</title>
<style>
#image-container img {
max-height: 140px;
}
li {
height: 140px;
min-width: 100px;
display: block;
float: left;
list-style: none;
margin: 0 5px 5px 0;
background-color: black;
background-position: center center;
background-repeat: no-repeat;
}
li img,
#status {
-webkit-transition: opacity 0.4s;
-moz-transition: opacity 0.4s;
-ms-transition: opacity 0.4s;
transition: opacity 0.4s;
}
li.is-loading {
background-color: black;
background-image: url('http://desandro.github.io/imagesloaded/assets/loading.gif');
}
li.is-broken {
background-image: url('http://desandro.github.io/imagesloaded/assets/broken.png');
background-color: #be3730;
width: 120px;
}
li.is-loading img,
li.is-broken img {
opacity: 0;
}
.buttons { margin-bottom: 1.0em; }
button {
font-size: 18px;
padding: 0.4em 0.8em;
font-family: sans-serif;
}
#status {
opacity: 0;
position: fixed;
right: 20px;
top: 20px;
background: hsla( 0, 0%, 0%, 0.8);
padding: 20px;
border-radius: 10px;
z-index: 2; /* over other stuff */
}
</style>
</head>
<body>
<h1>progress</h1>
<div class="buttons">
<button id="add">Add images</button>
<button id="reset">Reset</button>
</div>
<div id="status">
<progress max="7" value="0"></progress>
</div>
<div id="image-container"></div>
<script src="../../bower_components/ev-emitter/ev-emitter.js"></script>
<script src="../../imagesloaded.js"></script>
<script src="progress.js"></script>
</body>
</html>
@@ -0,0 +1,111 @@
/* jshint strict: false */
var progressElem, statusElem;
var supportsProgress;
var loadedImageCount, imageCount;
var container = document.querySelector('#image-container');
statusElem = document.querySelector('#status');
progressElem = document.querySelector('progress');
supportsProgress = progressElem &&
// IE does not support progress
progressElem.toString().indexOf('Unknown') === -1;
document.querySelector('#add').onclick = function() {
// add new images
var fragment = getItemsFragment();
container.insertBefore( fragment, container.firstChild );
// use ImagesLoaded
var imgLoad = imagesLoaded( container );
imgLoad.on( 'progress', onProgress );
imgLoad.on( 'always', onAlways );
// reset progress counter
imageCount = imgLoad.images.length;
resetProgress();
updateProgress( 0 );
};
// reset container
document.querySelector('#reset').onclick = function() {
empty( container );
};
// ----- set text helper ----- //
var docElem = document.documentElement;
var textSetter = docElem.textContent !== undefined ? 'textContent' : 'innerText';
function setText( elem, value ) {
elem[ textSetter ] = value;
}
function empty( elem ) {
while ( elem.firstChild ) {
elem.removeChild( elem.firstChild );
}
}
// ----- ----- //
// return doc fragment with
function getItemsFragment() {
var fragment = document.createDocumentFragment();
for ( var i = 0; i < 7; i++ ) {
var item = getImageItem();
fragment.appendChild( item );
}
return fragment;
}
// return an <li> with a <img> in it
function getImageItem() {
var item = document.createElement('li');
item.className = 'is-loading';
var img = document.createElement('img');
var size = Math.random() * 3 + 1;
var width = Math.random() * 110 + 100;
width = Math.round( width * size );
var height = Math.round( 140 * size );
var rando = Math.ceil( Math.random() * 1000 );
// 10% chance of broken image src
// random parameter to prevent cached images
img.src = rando < 100 ? '//foo/broken-' + rando + '.jpg' :
// use picsum for great random images
'https://picsum.photos/' + width + '/' + height + '/' + '?random';
item.appendChild( img );
return item;
}
// ----- ----- //
function resetProgress() {
statusElem.style.opacity = 1;
loadedImageCount = 0;
if ( supportsProgress ) {
progressElem.setAttribute( 'max', imageCount );
}
}
function updateProgress( value ) {
if ( supportsProgress ) {
progressElem.setAttribute( 'value', value );
} else {
// if you don't support progress elem
setText( statusElem, value + ' / ' + imageCount );
}
}
// triggered after each item is loaded
function onProgress( imgLoad, image ) {
// change class if the image is loaded or broken
image.img.parentNode.className = image.isLoaded ? '' : 'is-broken';
// update progress element
loadedImageCount++;
updateProgress( loadedImageCount );
}
// hide status when done
function onAlways() {
statusElem.style.opacity = 0;
}