JavaScript - Images Loaded

Oft möchte man etwas ausführen wenn alle Bilder geladen sind. Das funktioniert manchmal nicht zuverlässig, vor allem wenn Hintergrundbilder im Spiel sind. Eine Hilfe bieten ImageLoaded Skripte.

Images Loaded (1)

Beispiel

    var $container = $('.works-grid');
    $container.imagesLoaded( function() {
        $container.isotope({
            itemSelector: '.work-item',
            layoutMode: 'fitRows',
            percentPosition: true,
            masonry: { columnWidth: '.work-img' }
        });
    });

jQuery Plugin:

/*!
 * imagesLoaded PACKAGED v3.2.0
 * JavaScript is all like "You images are done yet or what?"
 * MIT License
 */

(function(){"use strict";function e(){}function t(e,t){for(var n=e.length;n--;)if(e[n].listener===t)return n;return-1}function n(e){return function(){return this[e].apply(this,arguments)}}var i=e.prototype,r=this,s=r.EventEmitter;i.getListeners=function(e){var t,n,i=this._getEvents();if("object"==typeof e){t={};for(n in i)i.hasOwnProperty(n)&&e.test(n)&&(t[n]=i[n])}else t=i[e]||(i[e]=[]);return t},i.flattenListeners=function(e){var t,n=[];for(t=0;t<e.length;t+=1)n.push(e[t].listener);return n},i.getListenersAsObject=function(e){var t,n=this.getListeners(e);return n instanceof Array&&(t={},t[e]=n),t||n},i.addListener=function(e,n){var i,r=this.getListenersAsObject(e),s="object"==typeof n;for(i in r)r.hasOwnProperty(i)&&-1===t(r[i],n)&&r[i].push(s?n:{listener:n,once:!1});return this},i.on=n("addListener"),i.addOnceListener=function(e,t){return this.addListener(e,{listener:t,once:!0})},i.once=n("addOnceListener"),i.defineEvent=function(e){return 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n.target=n.target||n.srcElement||t,n}var n=document.documentElement,i=function(){};n.addEventListener?i=function(e,t,n){e.addEventListener(t,n,!1)}:n.attachEvent&&(i=function(e,n,i){e[n+i]=i.handleEvent?function(){var n=t(e);i.handleEvent.call(i,n)}:function(){var n=t(e);i.call(e,n)},e.attachEvent("on"+n,e[n+i])});var r=function(){};n.removeEventListener?r=function(e,t,n){e.removeEventListener(t,n,!1)}:n.detachEvent&&(r=function(e,t,n){e.detachEvent("on"+t,e[t+n]);try{delete e[t+n]}catch(i){e[t+n]=void 0}});var s={bind:i,unbind:r};"function"==typeof define&&define.amd?define("eventie/eventie",s):e.eventie=s}(this),function(e,t){"use strict";"function"==typeof define&&define.amd?define(["eventEmitter/EventEmitter","eventie/eventie"],function(n,i){return t(e,n,i)}):"object"==typeof module&&module.exports?module.exports=t(e,require("wolfy87-eventemitter"),require("eventie")):e.imagesLoaded=t(e,e.EventEmitter,e.eventie)}(window,function(e,t,n){function i(e,t){for(var n in t)e[n]=t[n];return e}function r(e){return"[object Array]"==f.call(e)}function s(e){var t=[];if(r(e))t=e;else if("number"==typeof e.length)for(var n=0;n<e.length;n++)t.push(e[n]);else t.push(e);return t}function o(e,t,n){if(!(this instanceof o))return new o(e,t,n);"string"==typeof e&&(e=document.querySelectorAll(e)),this.elements=s(e),this.options=i({},this.options),"function"==typeof t?n=t:i(this.options,t),n&&this.on("always",n),this.getImages(),u&&(this.jqDeferred=new u.Deferred);var r=this;setTimeout(function(){r.check()})}function h(e){this.img=e}function a(e,t){this.url=e,this.element=t,this.img=new Image}var u=e.jQuery,c=e.console,f=Object.prototype.toString;o.prototype=new t,o.prototype.options={},o.prototype.getImages=function(){this.images=[];for(var e=0;e<this.elements.length;e++){var t=this.elements[e];this.addElementImages(t)}},o.prototype.addElementImages=function(e){"IMG"==e.nodeName&&this.addImage(e),this.options.background===!0&&this.addElementBackgroundImages(e);var t=e.nodeType;if(t&&d[t]){for(var n=e.querySelectorAll("img"),i=0;i<n.length;i++){var r=n[i];this.addImage(r)}if("string"==typeof this.options.background){var s=e.querySelectorAll(this.options.background);for(i=0;i<s.length;i++){var o=s[i];this.addElementBackgroundImages(o)}}}};var d={1:!0,9:!0,11:!0};o.prototype.addElementBackgroundImages=function(e){for(var t=m(e),n=/url\(['"]*([^'"\)]+)['"]*\)/gi,i=n.exec(t.backgroundImage);null!==i;){var r=i&&i[1];r&&this.addBackground(r,e),i=n.exec(t.backgroundImage)}};var m=e.getComputedStyle||function(e){return e.currentStyle};return o.prototype.addImage=function(e){var t=new h(e);this.images.push(t)},o.prototype.addBackground=function(e,t){var n=new a(e,t);this.images.push(n)},o.prototype.check=function(){function e(e,n,i){setTimeout(function(){t.progress(e,n,i)})}var t=this;if(this.progressedCount=0,this.hasAnyBroken=!1,!this.images.length)return void this.complete();for(var n=0;n<this.images.length;n++){var i=this.images[n];i.once("progress",e),i.check()}},o.prototype.progress=function(e,t,n){this.progressedCount++,this.hasAnyBroken=this.hasAnyBroken||!e.isLoaded,this.emit("progress",this,e,t),this.jqDeferred&&this.jqDeferred.notify&&this.jqDeferred.notify(this,e),this.progressedCount==this.images.length&&this.complete(),this.options.debug&&c&&c.log("progress: "+n,e,t)},o.prototype.complete=function(){var e=this.hasAnyBroken?"fail":"done";if(this.isComplete=!0,this.emit(e,this),this.emit("always",this),this.jqDeferred){var t=this.hasAnyBroken?"reject":"resolve";this.jqDeferred[t](this)}},h.prototype=new t,h.prototype.check=function(){var e=this.getIsImageComplete();return e?void this.confirm(0!==this.img.naturalWidth,"naturalWidth"):(this.proxyImage=new Image,n.bind(this.proxyImage,"load",this),n.bind(this.proxyImage,"error",this),n.bind(this.img,"load",this),n.bind(this.img,"error",this),void(this.proxyImage.src=this.img.src))},h.prototype.getIsImageComplete=function(){return this.img.complete&&void 0!==this.img.naturalWidth},h.prototype.confirm=function(e,t){this.isLoaded=e,this.emit("progress",this,this.img,t)},h.prototype.handleEvent=function(e){var t="on"+e.type;this[t]&&this[t](e)},h.prototype.onload=function(){this.confirm(!0,"onload"),this.unbindEvents()},h.prototype.onerror=function(){this.confirm(!1,"onerror"),this.unbindEvents()},h.prototype.unbindEvents=function(){n.unbind(this.proxyImage,"load",this),n.unbind(this.proxyImage,"error",this),n.unbind(this.img,"load",this),n.unbind(this.img,"error",this)},a.prototype=new h,a.prototype.check=function(){n.bind(this.img,"load",this),n.bind(this.img,"error",this),this.img.src=this.url;var e=this.getIsImageComplete();e&&(this.confirm(0!==this.img.naturalWidth,"naturalWidth"),this.unbindEvents())},a.prototype.unbindEvents=function(){n.unbind(this.img,"load",this),n.unbind(this.img,"error",this)},a.prototype.confirm=function(e,t){this.isLoaded=e,this.emit("progress",this,this.element,t)},o.makeJQueryPlugin=function(t){t=t||e.jQuery,t&&(u=t,u.fn.imagesLoaded=function(e,t){var n=new o(this,e,t);return n.jqDeferred.promise(u(this))})},o.makeJQueryPlugin(),o});