vanilla-lazyload - npm Package Compare versions

Comparing version 4.1.0 to 5.0.0

__test__/lazyload.test.js

@@ -87,2 +87,9 @@ const LazyLoad = require('../src/lazyLoad');
     expect(LazyLoad.prototype.update).toHaveBeenCalledTimes(2);
-});
+});
+
+test("Scroll is managed", () => {
+    LazyLoad.prototype.handleScroll = jest.fn();
+    window.scrollTo(0, 1);
+    expect(LazyLoad.prototype.update).toHaveBeenCalled();
+});
+

bower.json

@@ -0,0 +0,0 @@ {

demos/perf/jquery.lazyload.min.js

 /*! Lazy Load 1.9.3 - MIT license - Copyright 2010-2013 Mika Tuupola */
 !function(a,b,c,d){var e=a(b);a.fn.lazyload=function(f){function g(){var b=0;i.each(function(){var c=a(this);if(!j.skip_invisible||c.is(":visible"))if(a.abovethetop(this,j)||a.leftofbegin(this,j));else if(a.belowthefold(this,j)||a.rightoffold(this,j)){if(++b>j.failure_limit)return!1}else c.trigger("appear"),b=0})}var h,i=this,j={threshold:0,failure_limit:0,event:"scroll",effect:"show",container:b,data_attribute:"original",skip_invisible:!0,appear:null,load:null,placeholder:"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC"};return f&&(d!==f.failurelimit&&(f.failure_limit=f.failurelimit,delete f.failurelimit),d!==f.effectspeed&&(f.effect_speed=f.effectspeed,delete f.effectspeed),a.extend(j,f)),h=j.container===d||j.container===b?e:a(j.container),0===j.event.indexOf("scroll")&&h.bind(j.event,function(){return g()}),this.each(function(){var b=this,c=a(b);b.loaded=!1,(c.attr("src")===d||c.attr("src")===!1)&&c.is("img")&&c.attr("src",j.placeholder),c.one("appear",function(){if(!this.loaded){if(j.appear){var d=i.length;j.appear.call(b,d,j)}a("<img />").bind("load",function(){var d=c.attr("data-"+j.data_attribute);c.hide(),c.is("img")?c.attr("src",d):c.css("background-image","url('"+d+"')"),c[j.effect](j.effect_speed),b.loaded=!0;var e=a.grep(i,function(a){return!a.loaded});if(i=a(e),j.load){var f=i.length;j.load.call(b,f,j)}}).attr("src",c.attr("data-"+j.data_attribute))}}),0!==j.event.indexOf("scroll")&&c.bind(j.event,function(){b.loaded||c.trigger("appear")})}),e.bind("resize",function(){g()}),/(?:iphone|ipod|ipad).*os 5/gi.test(navigator.appVersion)&&e.bind("pageshow",function(b){b.originalEvent&&b.originalEvent.persisted&&i.each(function(){a(this).trigger("appear")})}),a(c).ready(function(){g()}),this},a.belowthefold=function(c,f){var g;return g=f.container===d||f.container===b?(b.innerHeight?b.innerHeight:e.height())+e.scrollTop():a(f.container).offset().top+a(f.container).height(),g<=a(c).offset().top-f.threshold},a.rightoffold=function(c,f){var g;return g=f.container===d||f.container===b?e.width()+e.scrollLeft():a(f.container).offset().left+a(f.container).width(),g<=a(c).offset().left-f.threshold},a.abovethetop=function(c,f){var g;return g=f.container===d||f.container===b?e.scrollTop():a(f.container).offset().top,g>=a(c).offset().top+f.threshold+a(c).height()},a.leftofbegin=function(c,f){var g;return g=f.container===d||f.container===b?e.scrollLeft():a(f.container).offset().left,g>=a(c).offset().left+f.threshold+a(c).width()},a.inviewport=function(b,c){return!(a.rightoffold(b,c)||a.leftofbegin(b,c)||a.belowthefold(b,c)||a.abovethetop(b,c))},a.extend(a.expr[":"],{"below-the-fold":function(b){return a.belowthefold(b,{threshold:0})},"above-the-top":function(b){return!a.belowthefold(b,{threshold:0})},"right-of-screen":function(b){return a.rightoffold(b,{threshold:0})},"left-of-screen":function(b){return!a.rightoffold(b,{threshold:0})},"in-viewport":function(b){return a.inviewport(b,{threshold:0})},"above-the-fold":function(b){return!a.belowthefold(b,{threshold:0})},"right-of-fold":function(b){return a.rightoffold(b,{threshold:0})},"left-of-fold":function(b){return!a.rightoffold(b,{threshold:0})}})}(jQuery,window,document);

dist/lazyload.min.js

@@ -1,2 +0,2 @@
-!function(a,b){"function"==typeof define&&define.amd?define([],b):"object"==typeof exports?module.exports=b():a.LazyLoad=b()}(this,function(){function a(a,b,c){function d(){return window.innerWidth||l.documentElement.clientWidth||document.body.clientWidth}function e(){return window.innerHeight||l.documentElement.clientHeight||document.body.clientHeight}function f(a){return a.getBoundingClientRect().top+m-l.documentElement.clientTop}function g(a){return a.getBoundingClientRect().left+n-l.documentElement.clientLeft}function h(){var d;return d=b===window?e()+m:f(b)+b.offsetHeight,d<=f(a)-c}function i(){var e;return e=b===window?d()+window.pageXOffset:g(b)+d(),e<=g(a)-c}function j(){var d;return d=b===window?m:f(b),d>=f(a)+c+a.offsetHeight}function k(){var d;return d=b===window?n:g(b),d>=g(a)+c+a.offsetWidth}var l,m,n;return l=a.ownerDocument,m=window.pageYOffset||l.body.scrollTop,n=window.pageXOffset||l.body.scrollLeft,!(h()||j()||i()||k())}function b(){var a=new Date;return a.getTime()}function c(a,b){var c,d={};for(c in a)a.hasOwnProperty(c)&&(d[c]=a[c]);for(c in b)b.hasOwnProperty(c)&&(d[c]=b[c]);return d}function d(a){return Array.prototype.slice.call(a)}function e(a,b){var c=a.parentElement;if("PICTURE"===c.tagName)for(var d=0;d<c.children.length;d++){var e=c.children[d];if("SOURCE"===e.tagName){var f=e.getAttribute("data-"+b);f&&e.setAttribute("srcset",f)}}}function f(a,b,c){var d=a.tagName,f=a.getAttribute("data-"+c);if("IMG"===d){e(a,b);var g=a.getAttribute("data-"+b);return g&&a.setAttribute("srcset",g),void(f&&a.setAttribute("src",f))}return"IFRAME"===d?void(f&&a.setAttribute("src",f)):void(f&&(a.style.backgroundImage="url("+f+")"))}function g(a,b){return function(){return a.apply(b,arguments)}}function h(a){this._settings=c(i,a),this._queryOriginNode=this._settings.container===window?document:this._settings.container,this._previousLoopTime=0,this._loopTimeout=null,this._handleScrollFn=g(this.handleScroll,this),window.addEventListener("resize",this._handleScrollFn),this.update()}var i={elements_selector:"img",container:window,threshold:300,throttle:150,data_src:"original",data_srcset:"original-set",class_loading:"loading",class_loaded:"loaded",skip_invisible:!0,callback_load:null,callback_error:null,callback_set:null,callback_processed:null};return h.prototype._showOnAppear=function(a){function b(){a.removeEventListener("load",c),a.classList.remove(d.class_loading),d.callback_error&&d.callback_error(a)}function c(){null!==d&&(d.callback_load&&d.callback_load(a),a.classList.remove(d.class_loading),a.classList.add(d.class_loaded),a.removeEventListener("load",c),a.removeEventListener("error",b))}var d=this._settings;"IMG"!==a.tagName&&"IFRAME"!==a.tagName||(a.addEventListener("load",c),a.addEventListener("error",b),a.classList.add(d.class_loading)),f(a,d.data_srcset,d.data_src),d.callback_set&&d.callback_set(a)},h.prototype._loopThroughElements=function(){var b,c,d=this._settings,e=this._elements,f=e?e.length:0,g=[];for(b=0;b<f;b++)c=e[b],d.skip_invisible&&null===c.offsetParent||a(c,d.container,d.threshold)&&(this._showOnAppear(c),g.push(b),c.wasProcessed=!0);for(;g.length>0;)e.splice(g.pop(),1),d.callback_processed&&d.callback_processed(e.length);0===f&&this._stopScrollHandler()},h.prototype._purgeElements=function(){var a,b,c=this._elements,d=c.length,e=[];for(a=0;a<d;a++)b=c[a],b.wasProcessed&&e.push(a);for(;e.length>0;)c.splice(e.pop(),1)},h.prototype._startScrollHandler=function(){this._isHandlingScroll||(this._isHandlingScroll=!0,this._settings.container.addEventListener("scroll",this._handleScrollFn))},h.prototype._stopScrollHandler=function(){this._isHandlingScroll&&(this._isHandlingScroll=!1,this._settings.container.removeEventListener("scroll",this._handleScrollFn))},h.prototype.handleScroll=function(){var a,c,d;this._settings&&(c=b(),d=this._settings.throttle,0!==d?(a=d-(c-this._previousLoopTime),a<=0||a>d?(this._loopTimeout&&(clearTimeout(this._loopTimeout),this._loopTimeout=null),this._previousLoopTime=c,this._loopThroughElements()):this._loopTimeout||(this._loopTimeout=setTimeout(g(function(){this._previousLoopTime=b(),this._loopTimeout=null,this._loopThroughElements()},this),a))):this._loopThroughElements())},h.prototype.update=function(){this._elements=d(this._queryOriginNode.querySelectorAll(this._settings.elements_selector)),this._purgeElements(),this._loopThroughElements(),this._startScrollHandler()},h.prototype.destroy=function(){window.removeEventListener("resize",this._handleScrollFn),this._loopTimeout&&(clearTimeout(this._loopTimeout),this._loopTimeout=null),this._stopScrollHandler(),this._elements=null,this._queryOriginNode=null,this._settings=null},h});
+!function(a,b){"function"==typeof define&&define.amd?define([],b):"object"==typeof exports?module.exports=b():a.LazyLoad=b()}(this,function(){function a(){return(new Date).getTime()}function b(a){this._settings=this._merge_objects(c,a),this._queryOriginNode=this._settings.container===window?document:this._settings.container,this._previousLoopTime=0,this._loopTimeout=null,this._boundHandleScroll=this.handleScroll.bind(this),window.addEventListener("resize",this._boundHandleScroll),this.update()}var c={elements_selector:"img",container:window,threshold:300,throttle:150,data_src:"original",data_srcset:"original-set",class_loading:"loading",class_loaded:"loaded",skip_invisible:!0,callback_load:null,callback_error:null,callback_set:null,callback_processed:null};return b.prototype={_isInsideViewport:function(a,b,c){function d(){return window.innerWidth||l.documentElement.clientWidth||document.body.clientWidth}function e(){return window.innerHeight||l.documentElement.clientHeight||document.body.clientHeight}function f(a){return a.getBoundingClientRect().top+m-l.documentElement.clientTop}function g(a){return a.getBoundingClientRect().left+n-l.documentElement.clientLeft}function h(){return(b===window?e()+m:f(b)+b.offsetHeight)<=f(a)-c}function i(){return(b===window?d()+window.pageXOffset:g(b)+d())<=g(a)-c}function j(){return(b===window?m:f(b))>=f(a)+c+a.offsetHeight}function k(){return(b===window?n:g(b))>=g(a)+c+a.offsetWidth}var l,m,n;return l=a.ownerDocument,m=window.pageYOffset||l.body.scrollTop,n=window.pageXOffset||l.body.scrollLeft,!(h()||j()||i()||k())},_merge_objects:function(a,b){var c,d={};for(c in a)a.hasOwnProperty(c)&&(d[c]=a[c]);for(c in b)b.hasOwnProperty(c)&&(d[c]=b[c]);return d},_setSourcesForPicture:function(a,b){var c=a.parentElement;if("PICTURE"===c.tagName)for(var d=0;d<c.children.length;d++){var e=c.children[d];if("SOURCE"===e.tagName){var f=e.getAttribute("data-"+b);f&&e.setAttribute("srcset",f)}}},_setSources:function(a,b,c){var d=a.tagName,e=a.getAttribute("data-"+c);if("IMG"===d){this._setSourcesForPicture(a,b);var f=a.getAttribute("data-"+b);return f&&a.setAttribute("srcset",f),void(e&&a.setAttribute("src",e))}if("IFRAME"===d)return void(e&&a.setAttribute("src",e));e&&(a.style.backgroundImage="url("+e+")")},_showOnAppear:function(a){function b(){a.removeEventListener("load",c),a.classList.remove(d.class_loading),d.callback_error&&d.callback_error(a)}function c(){null!==d&&(d.callback_load&&d.callback_load(a),a.classList.remove(d.class_loading),a.classList.add(d.class_loaded),a.removeEventListener("load",c),a.removeEventListener("error",b))}var d=this._settings;"IMG"!==a.tagName&&"IFRAME"!==a.tagName||(a.addEventListener("load",c),a.addEventListener("error",b),a.classList.add(d.class_loading)),this._setSources(a,d.data_srcset,d.data_src),d.callback_set&&d.callback_set(a)},_loopThroughElements:function(){var a,b,c=this._settings,d=this._elements,e=d?d.length:0,f=[];for(a=0;a<e;a++)b=d[a],c.skip_invisible&&null===b.offsetParent||this._isInsideViewport(b,c.container,c.threshold)&&(this._showOnAppear(b),f.push(a),b.wasProcessed=!0);for(;f.length>0;)d.splice(f.pop(),1),c.callback_processed&&c.callback_processed(d.length);0===e&&this._stopScrollHandler()},_purgeElements:function(){var a,b,c=this._elements,d=c.length,e=[];for(a=0;a<d;a++)b=c[a],b.wasProcessed&&e.push(a);for(;e.length>0;)c.splice(e.pop(),1)},_startScrollHandler:function(){this._isHandlingScroll||(this._isHandlingScroll=!0,this._settings.container.addEventListener("scroll",this._boundHandleScroll))},_stopScrollHandler:function(){this._isHandlingScroll&&(this._isHandlingScroll=!1,this._settings.container.removeEventListener("scroll",this._boundHandleScroll))},handleScroll:function(){var b,c,d;this._settings&&(c=a(),d=this._settings.throttle,0!==d?(b=d-(c-this._previousLoopTime),b<=0||b>d?(this._loopTimeout&&(clearTimeout(this._loopTimeout),this._loopTimeout=null),this._previousLoopTime=c,this._loopThroughElements()):this._loopTimeout||(this._loopTimeout=setTimeout(function(){this._previousLoopTime=a(),this._loopTimeout=null,this._loopThroughElements()}.bind(this),b))):this._loopThroughElements())},update:function(){this._elements=Array.prototype.slice.call(this._queryOriginNode.querySelectorAll(this._settings.elements_selector)),this._purgeElements(),this._loopThroughElements(),this._startScrollHandler()},destroy:function(){window.removeEventListener("resize",this._boundHandleScroll),this._loopTimeout&&(clearTimeout(this._loopTimeout),this._loopTimeout=null),this._stopScrollHandler(),this._elements=null,this._queryOriginNode=null,this._settings=null}},b});
 //# sourceMappingURL=lazyload.min.js.map

Gruntfile.js

@@ -0,0 +0,0 @@ module.exports = function(grunt) {

license.md

@@ -0,0 +0,0 @@ The MIT License (MIT)

package.json

 {
   "name": "vanilla-lazyload",
-  "version": "4.1.0",
+  "version": "5.0.0",
   "description": "A fast, lightweight script to load images as they enter the viewport. Supporting responsive images (both srcset + sizes and picture).",
@@ -5,0 +5,0 @@ "main": "dist/lazyload.min.js",

README.md

@@ -0,0 +0,0 @@ # LazyLoad (aka Vanilla LazyLoad)

src/lazyload.js

@@ -1,2 +0,2 @@
-(function(root, factory) {
+(function (root, factory) {
     if (typeof define === 'function' && define.amd) {
@@ -9,3 +9,3 @@ define([], factory);
     }
-}(this, function() {
+}(this, function () {
 
@@ -28,332 +28,322 @@ var _defaultSettings = {
 
+    /* 
+     * UTILITY FUNCTIONS
+     * -----------------
+     */
+    
+    function _now() {
+        var d = new Date();
+        return d.getTime();
+    }
+
     /*
-     * PRIVATE FUNCTIONS *NOT RELATED* TO A SPECIFIC INSTANCE OF LAZY LOAD
-     * -------------------------------------------------------------------
+     * CONSTRUCTOR
+     * -----------
      */
 
-    function _isInsideViewport(element, container, threshold) {
+    function LazyLoad(instanceSettings) {
+        this._settings = this._merge_objects(_defaultSettings, instanceSettings);
+        this._queryOriginNode = this._settings.container === window ? document : this._settings.container;
 
-        var ownerDocument, documentTop, documentLeft;
+        this._previousLoopTime = 0;
+        this._loopTimeout = null;
+        this._boundHandleScroll = this.handleScroll.bind(this);
 
-        function _getDocumentWidth() {
-            return window.innerWidth || (ownerDocument.documentElement.clientWidth || document.body.clientWidth);
-        }
+        window.addEventListener("resize", this._boundHandleScroll);
+        this.update();
+    }
 
-        function _getDocumentHeight() {
-            return window.innerHeight || (ownerDocument.documentElement.clientHeight || document.body.clientHeight);
-        }
+    LazyLoad.prototype = {
 
-        function _getTopOffset(element) {
-            return element.getBoundingClientRect().top + documentTop - ownerDocument.documentElement.clientTop;
-        }
+        /*
+        * PRIVATE FUNCTIONS
+        * -----------------
+        */
 
-        function _getLeftOffset(element) {
-            return element.getBoundingClientRect().left + documentLeft - ownerDocument.documentElement.clientLeft;
-        }
+        _isInsideViewport: function (element, container, threshold) {
 
-        function _isBelowViewport() {
-            var fold;
-            if (container === window) {
-                fold = _getDocumentHeight() + documentTop;
-            } else {
-                fold = _getTopOffset(container) + container.offsetHeight;
+            var ownerDocument, documentTop, documentLeft;
+
+            function _getDocumentWidth() {
+                return window.innerWidth || (ownerDocument.documentElement.clientWidth || document.body.clientWidth);
             }
-            return fold <= _getTopOffset(element) - threshold;
-        }
 
-        function _isAtRightOfViewport() {
-            var fold;
-            if (container === window) {
-                fold = _getDocumentWidth() + window.pageXOffset;
-            } else {
-                fold = _getLeftOffset(container) + _getDocumentWidth();
+            function _getDocumentHeight() {
+                return window.innerHeight || (ownerDocument.documentElement.clientHeight || document.body.clientHeight);
             }
-            return fold <= _getLeftOffset(element) - threshold;
-        }
 
-        function _isAboveViewport() {
-            var fold;
-            if (container === window) {
-                fold = documentTop;
-            } else {
-                fold = _getTopOffset(container);
+            function _getTopOffset(element) {
+                return element.getBoundingClientRect().top + documentTop - ownerDocument.documentElement.clientTop;
             }
-            return fold >= _getTopOffset(element) + threshold + element.offsetHeight;
-        }
 
-        function _isAtLeftOfViewport() {
-            var fold;
-            if (container === window) {
-                fold = documentLeft;
-            } else {
-                fold = _getLeftOffset(container);
+            function _getLeftOffset(element) {
+                return element.getBoundingClientRect().left + documentLeft - ownerDocument.documentElement.clientLeft;
             }
-            return fold >= _getLeftOffset(element) + threshold + element.offsetWidth;
-        }
 
-        ownerDocument = element.ownerDocument;
-        documentTop = window.pageYOffset || ownerDocument.body.scrollTop;
-        documentLeft = window.pageXOffset || ownerDocument.body.scrollLeft;
+            function _isBelowViewport() {
+                var fold;
+                if (container === window) {
+                    fold = _getDocumentHeight() + documentTop;
+                } else {
+                    fold = _getTopOffset(container) + container.offsetHeight;
+                }
+                return fold <= _getTopOffset(element) - threshold;
+            }
 
-        return !_isBelowViewport() && !_isAboveViewport() && !_isAtRightOfViewport() && !_isAtLeftOfViewport();
-    }
+            function _isAtRightOfViewport() {
+                var fold;
+                if (container === window) {
+                    fold = _getDocumentWidth() + window.pageXOffset;
+                } else {
+                    fold = _getLeftOffset(container) + _getDocumentWidth();
+                }
+                return fold <= _getLeftOffset(element) - threshold;
+            }
 
-    function _now() {
-        var d = new Date();
-        return d.getTime();
-    }
+            function _isAboveViewport() {
+                var fold;
+                if (container === window) {
+                    fold = documentTop;
+                } else {
+                    fold = _getTopOffset(container);
+                }
+                return fold >= _getTopOffset(element) + threshold + element.offsetHeight;
+            }
 
-    function _merge_objects(obj1, obj2) {
-        var obj3 = {},
-            propertyName;
-        for (propertyName in obj1) {
-            if (obj1.hasOwnProperty(propertyName)) {
-                obj3[propertyName] = obj1[propertyName];
+            function _isAtLeftOfViewport() {
+                var fold;
+                if (container === window) {
+                    fold = documentLeft;
+                } else {
+                    fold = _getLeftOffset(container);
+                }
+                return fold >= _getLeftOffset(element) + threshold + element.offsetWidth;
             }
-        }
-        for (propertyName in obj2) {
-            if (obj2.hasOwnProperty(propertyName)) {
-                obj3[propertyName] = obj2[propertyName];
-            }
-        }
-        return obj3;
-    }
 
-    function _convertToArray(nodeSet) {
-        return Array.prototype.slice.call(nodeSet);
-    }
+            ownerDocument = element.ownerDocument;
+            documentTop = window.pageYOffset || ownerDocument.body.scrollTop;
+            documentLeft = window.pageXOffset || ownerDocument.body.scrollLeft;
 
-    function _setSourcesForPicture(element, srcsetDataAttribute) {
-        var parent = element.parentElement;
-        if (parent.tagName !== 'PICTURE') {
-            return;
-        }
-        for (var i = 0; i < parent.children.length; i++) {
-            var pictureChild = parent.children[i];
-            if (pictureChild.tagName === 'SOURCE') {
-                var sourceSrcset = pictureChild.getAttribute('data-' + srcsetDataAttribute);
-                if (sourceSrcset) {
-                    pictureChild.setAttribute('srcset', sourceSrcset);
+            return !_isBelowViewport() && !_isAboveViewport() && !_isAtRightOfViewport() && !_isAtLeftOfViewport();
+        },
+
+        _merge_objects: function (obj1, obj2) {
+            var obj3 = {},
+                propertyName;
+            for (propertyName in obj1) {
+                if (obj1.hasOwnProperty(propertyName)) {
+                    obj3[propertyName] = obj1[propertyName];
                 }
             }
-        }
-    }
+            for (propertyName in obj2) {
+                if (obj2.hasOwnProperty(propertyName)) {
+                    obj3[propertyName] = obj2[propertyName];
+                }
+            }
+            return obj3;
+        },
 
-    function _setSources(element, srcsetDataAttribute, srcDataAttribute) {
-        var tagName = element.tagName;
-        var elementSrc = element.getAttribute('data-' + srcDataAttribute);
-        if (tagName === "IMG") {
-            _setSourcesForPicture(element, srcsetDataAttribute);
-            var imgSrcset = element.getAttribute('data-' + srcsetDataAttribute);
-            if (imgSrcset) element.setAttribute("srcset", imgSrcset);
-            if (elementSrc) element.setAttribute("src", elementSrc);
-            return;
-        }
-        if (tagName === "IFRAME") {
-            if (elementSrc) element.setAttribute("src", elementSrc);
-            return;
-        }
-        if (elementSrc) element.style.backgroundImage = "url(" + elementSrc + ")";
-    }
+        _setSourcesForPicture: function (element, srcsetDataAttribute) {
+            var parent = element.parentElement;
+            if (parent.tagName !== 'PICTURE') {
+                return;
+            }
+            for (var i = 0; i < parent.children.length; i++) {
+                var pictureChild = parent.children[i];
+                if (pictureChild.tagName === 'SOURCE') {
+                    var sourceSrcset = pictureChild.getAttribute('data-' + srcsetDataAttribute);
+                    if (sourceSrcset) {
+                        pictureChild.setAttribute('srcset', sourceSrcset);
+                    }
+                }
+            }
+        },
 
-    function _bind(fn, obj) {
-        return function() {
-            return fn.apply(obj, arguments);
-        };
-    }
+        _setSources: function (element, srcsetDataAttribute, srcDataAttribute) {
+            var tagName = element.tagName;
+            var elementSrc = element.getAttribute('data-' + srcDataAttribute);
+            if (tagName === "IMG") {
+                this._setSourcesForPicture(element, srcsetDataAttribute);
+                var imgSrcset = element.getAttribute('data-' + srcsetDataAttribute);
+                if (imgSrcset) element.setAttribute("srcset", imgSrcset);
+                if (elementSrc) element.setAttribute("src", elementSrc);
+                return;
+            }
+            if (tagName === "IFRAME") {
+                if (elementSrc) element.setAttribute("src", elementSrc);
+                return;
+            }
+            if (elementSrc) element.style.backgroundImage = "url(" + elementSrc + ")";
+        },
 
+        _showOnAppear: function (element) {
+            var settings = this._settings;
 
-    /*
-     * INITIALIZER
-     * -----------
-     */
+            function errorCallback() {
+                element.removeEventListener("load", loadCallback);
+                element.classList.remove(settings.class_loading);
+                if (settings.callback_error) {
+                    settings.callback_error(element);
+                }
+            }
 
-    function LazyLoad(instanceSettings) {
-        this._settings = _merge_objects(_defaultSettings, instanceSettings);
-        this._queryOriginNode = this._settings.container === window ? document : this._settings.container;
+            function loadCallback() {
+                /* As this method is asynchronous, it must be protected against external destroy() calls */
+                if (settings === null) {
+                    return;
+                }
+                /* Calling LOAD callback */
+                if (settings.callback_load) {
+                    settings.callback_load(element);
+                }
+                element.classList.remove(settings.class_loading);
+                element.classList.add(settings.class_loaded);
+                element.removeEventListener("load", loadCallback);
+                element.removeEventListener("error", errorCallback);
+            }
 
-        this._previousLoopTime = 0;
-        this._loopTimeout = null;
+            if (element.tagName === "IMG" || element.tagName === "IFRAME") {
+                element.addEventListener("load", loadCallback);
+                element.addEventListener("error", errorCallback);
+                element.classList.add(settings.class_loading);
+            }
 
-        this._handleScrollFn = _bind(this.handleScroll, this);
+            this._setSources(element, settings.data_srcset, settings.data_src);
+            /* Calling SET callback */
+            if (settings.callback_set) {
+                settings.callback_set(element);
+            }
+        },
 
-        window.addEventListener("resize", this._handleScrollFn);
-        this.update();
-    }
+        _loopThroughElements: function () {
+            var i, element,
+                settings = this._settings,
+                elements = this._elements,
+                elementsLength = (!elements) ? 0 : elements.length,
+                processedIndexes = [];
 
+            for (i = 0; i < elementsLength; i++) {
+                element = elements[i];
+                /* If must skip_invisible and element is invisible, skip it */
+                if (settings.skip_invisible && (element.offsetParent === null)) {
+                    continue;
+                }
+                if (this._isInsideViewport(element, settings.container, settings.threshold)) {
+                    this._showOnAppear(element);
 
-    /*
-     * PRIVATE FUNCTIONS *RELATED* TO A SPECIFIC INSTANCE OF LAZY LOAD
-     * ---------------------------------------------------------------
-     */
-
-    LazyLoad.prototype._showOnAppear = function(element) {
-        var settings = this._settings;
-
-        function errorCallback() {
-            element.removeEventListener("load", loadCallback);
-            element.classList.remove(settings.class_loading);
-            if (settings.callback_error) {
-                settings.callback_error(element);
+                    /* Marking the element as processed. */
+                    processedIndexes.push(i);
+                    element.wasProcessed = true;
+                }
             }
-        }
-        function loadCallback() {
-            /* As this method is asynchronous, it must be protected against external destroy() calls */
-            if (settings === null) {
-                return;
+            /* Removing processed elements from this._elements. */
+            while (processedIndexes.length > 0) {
+                elements.splice(processedIndexes.pop(), 1);
+                /* Calling the end loop callback */
+                if (settings.callback_processed) {
+                    settings.callback_processed(elements.length);
+                }
             }
-            /* Calling LOAD callback */
-            if (settings.callback_load) {
-                settings.callback_load(element);
+            /* Stop listening to scroll event when 0 elements remains */
+            if (elementsLength === 0) {
+                this._stopScrollHandler();
             }
-            element.classList.remove(settings.class_loading);
-            element.classList.add(settings.class_loaded);
-            element.removeEventListener("load", loadCallback);
-            element.removeEventListener("error", errorCallback);
-        }
+        },
 
-        if (element.tagName === "IMG" || element.tagName === "IFRAME") {
-            element.addEventListener("load", loadCallback);
-            element.addEventListener("error", errorCallback);
-            element.classList.add(settings.class_loading);
-        }
+        _purgeElements: function () {
+            var i, element,
+                elements = this._elements,
+                elementsLength = elements.length,
+                elementsToPurge = [];
 
-        _setSources(element, settings.data_srcset, settings.data_src);
-        /* Calling SET callback */
-        if (settings.callback_set) {
-            settings.callback_set(element);
-        }
-    };
-
-    LazyLoad.prototype._loopThroughElements = function() {
-        var i, element,
-            settings = this._settings,
-            elements = this._elements,
-            elementsLength = (!elements) ? 0 : elements.length,
-            processedIndexes = [];
-
-        for (i = 0; i < elementsLength; i++) {
-            element = elements[i];
-            /* If must skip_invisible and element is invisible, skip it */
-            if (settings.skip_invisible && (element.offsetParent === null)) {
-                continue;
+            for (i = 0; i < elementsLength; i++) {
+                element = elements[i];
+                /* If the element has already been processed, skip it */
+                if (element.wasProcessed) {
+                    elementsToPurge.push(i);
+                }
             }
-            if (_isInsideViewport(element, settings.container, settings.threshold)) {
-                this._showOnAppear(element);
+            /* Removing elements to purge from this._elements. */
+            while (elementsToPurge.length > 0) {
+                elements.splice(elementsToPurge.pop(), 1);
+            }
+        },
 
-                /* Marking the element as processed. */
-                processedIndexes.push(i);
-                element.wasProcessed = true;
+        _startScrollHandler: function () {
+            if (!this._isHandlingScroll) {
+                this._isHandlingScroll = true;
+                this._settings.container.addEventListener("scroll", this._boundHandleScroll);
             }
-        }
-        /* Removing processed elements from this._elements. */
-        while (processedIndexes.length > 0) {
-            elements.splice(processedIndexes.pop(), 1);
-            /* Calling the end loop callback */
-            if (settings.callback_processed) {
-                settings.callback_processed(elements.length);
-            }
-        }
-        /* Stop listening to scroll event when 0 elements remains */
-        if (elementsLength === 0) {
-            this._stopScrollHandler();
-        }
-    };
+        },
 
-    LazyLoad.prototype._purgeElements = function() {
-        var i, element,
-            elements = this._elements,
-            elementsLength = elements.length,
-            elementsToPurge = [];
-
-        for (i = 0; i < elementsLength; i++) {
-            element = elements[i];
-            /* If the element has already been processed, skip it */
-            if (element.wasProcessed) {
-                elementsToPurge.push(i);
+        _stopScrollHandler: function () {
+            if (this._isHandlingScroll) {
+                this._isHandlingScroll = false;
+                this._settings.container.removeEventListener("scroll", this._boundHandleScroll);
             }
-        }
-        /* Removing elements to purge from this._elements. */
-        while (elementsToPurge.length > 0) {
-            elements.splice(elementsToPurge.pop(), 1);
-        }
-    };
+        },
 
-    LazyLoad.prototype._startScrollHandler = function() {
-        if (!this._isHandlingScroll) {
-            this._isHandlingScroll = true;
-            this._settings.container.addEventListener("scroll", this._handleScrollFn);
-        }
-    };
 
-    LazyLoad.prototype._stopScrollHandler = function() {
-        if (this._isHandlingScroll) {
-            this._isHandlingScroll = false;
-            this._settings.container.removeEventListener("scroll", this._handleScrollFn);
-        }
-    };
+        /*
+        * PUBLIC FUNCTIONS
+        * ----------------
+        */
 
+        handleScroll: function () {
+            var remainingTime,
+                now,
+                throttle;
 
-    /*
-     * PUBLIC FUNCTIONS
-     * ----------------
-     */
+            // IE8 fix for destroy() malfunctioning
+            if (!this._settings) {
+                return;
+            }
 
-    LazyLoad.prototype.handleScroll = function() {
-        var remainingTime,
-            now,
-            throttle;
+            now = _now();
+            throttle = this._settings.throttle;
 
-        // IE8 fix for destroy() malfunctioning
-        if (!this._settings) {
-            return;
-        }
-
-        now = _now();
-        throttle = this._settings.throttle;
-
-        if (throttle !== 0) {
-            remainingTime = throttle - (now - this._previousLoopTime);
-            if (remainingTime <= 0 || remainingTime > throttle) {
-                if (this._loopTimeout) {
-                    clearTimeout(this._loopTimeout);
-                    this._loopTimeout = null;
+            if (throttle !== 0) {
+                remainingTime = throttle - (now - this._previousLoopTime);
+                if (remainingTime <= 0 || remainingTime > throttle) {
+                    if (this._loopTimeout) {
+                        clearTimeout(this._loopTimeout);
+                        this._loopTimeout = null;
+                    }
+                    this._previousLoopTime = now;
+                    this._loopThroughElements();
+                } else if (!this._loopTimeout) {
+                    this._loopTimeout = setTimeout(function () {
+                        this._previousLoopTime = _now();
+                        this._loopTimeout = null;
+                        this._loopThroughElements();
+                    }.bind(this), remainingTime);
                 }
-                this._previousLoopTime = now;
+            } else {
                 this._loopThroughElements();
-            } else if (!this._loopTimeout) {
-                this._loopTimeout = setTimeout(_bind(function() {
-                    this._previousLoopTime = _now();
-                    this._loopTimeout = null;
-                    this._loopThroughElements();
-                }, this), remainingTime);
             }
-        } else {
+        },
+
+        update: function () {
+            // Converts to array the nodeset obtained querying the DOM from _queryOriginNode with elements_selector
+            this._elements = Array.prototype.slice.call(this._queryOriginNode.querySelectorAll(this._settings.elements_selector));
+            this._purgeElements();
             this._loopThroughElements();
-        }
-    };
+            this._startScrollHandler();
+        },
 
-    LazyLoad.prototype.update = function() {
-        this._elements = _convertToArray(this._queryOriginNode.querySelectorAll(this._settings.elements_selector));
-        this._purgeElements();
-        this._loopThroughElements();
-        this._startScrollHandler();
-    };
-
-    LazyLoad.prototype.destroy = function() {
-        window.removeEventListener("resize", this._handleScrollFn);
-        if (this._loopTimeout) {
-            clearTimeout(this._loopTimeout);
-            this._loopTimeout = null;
+        destroy: function () {
+            window.removeEventListener("resize", this._boundHandleScroll);
+            if (this._loopTimeout) {
+                clearTimeout(this._loopTimeout);
+                this._loopTimeout = null;
+            }
+            this._stopScrollHandler();
+            this._elements = null;
+            this._queryOriginNode = null;
+            this._settings = null;
         }
-        this._stopScrollHandler();
-        this._elements = null;
-        this._queryOriginNode = null;
-        this._settings = null;
     };
 
-
     return LazyLoad;
 
-
 }));

todo.md

@@ -0,0 +0,0 @@ TODO

typings/lazyload.d.ts

@@ -0,0 +0,0 @@ interface ILazyLoadOptions {

No alert changes

Improved metrics

Total package byte prevSize

858157

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