scrollLoading插件实现图片延迟懒加载实例包涵html和js代码

来源：互联网发布：期货实时行情软件编辑：程序博客网时间：2024/05/17 04:27

引用两个js文件：

<script src="js/jquery-1.9.1.min.js" type="text/javascript"></script><script src="js/jquery.scrollLoading-min.js" type="text/javascript"></script>

html代码部分：

<html><head> <title>测试页</title> <meta charset="UTF-8"/>    <script src="js/jquery-1.9.1.min.js" type="text/javascript"></script>    <script src="js/jquery.scrollLoading-min.js" type="text/javascript"></script>    <style type="text/css">        #box{            margin: 0 auto;            text-align: center;        }        .scrollLoading{            margin-bottom: 10px;        }    </style></head><body><div id="box">    <img data-url="img/0.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"/></br>    <img data-url="img/1.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg" ></br>    <img data-url="img/2.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg" ></br>    <img data-url="img/3.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg" ></br>    <img data-url="img/4.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg" ></br>    <img data-url="img/5.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg" ></br>    <img data-url="img/6.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/7.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/8.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg" ></br>    <img data-url="img/9.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/10.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/11.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/12.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/13.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/14.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/15.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/16.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/17.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/18.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/19.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/20.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/21.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/22.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/23.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/24.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/25.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/26.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br>    <img data-url="img/27.jpg"  class="scrollLoading" align="absmiddle" src="img/load.jpg"></br></div>    <script type="text/javascript">        $(function(){            $(".scrollLoading").scrollLoading();        })    </script></body></html>

js代码部分：

if (/zhangxinxu|localhost/.test(location.href)==false) { alert('含外链JS资源，页面即将跳转...');location.href = "http://www.zhangxinxu.com/sp/welcome.php"; }/*! * jquery.scrollLoading.js * by zhangxinxu  http://www.zhangxinxu.com * 2010-11-19 v1.0 * 2012-01-13 v1.1 偏移值计算修改 position → offset * 2012-09-25 v1.2 增加滚动容器参数, 回调参数 * 2015-11-17 v1.3 只对显示元素进行处理*/(function($) {    $.fn.scrollLoading = function(options) {        var defaults = {            attr: "data-url",            container: $(window),            callback: $.noop        };        var params = $.extend({}, defaults, options || {});        params.cache = [];        $(this).each(function() {            var node = this.nodeName.toLowerCase(), url = $(this).attr(params["attr"]);            //重组            var data = {                obj: $(this),                tag: node,                url: url            };            params.cache.push(data);        });        var callback = function(call) {            if ($.isFunction(params.callback)) {                params.callback.call(call.get(0));            }        };        //动态显示数据        var loading = function() {            var contHeight = params.container.height();            if ($(window).get(0) === window) {                contop = $(window).scrollTop();            } else {                contop = params.container.offset().top;            }                    $.each(params.cache, function(i, data) {                var o = data.obj, tag = data.tag, url = data.url, post, posb;                if (o) {                    post = o.offset().top - contop, post + o.height();                    if (o.is(':visible') && (post >= 0 && post < contHeight) || (posb > 0 && posb <= contHeight)) {                        if (url) {                            //在浏览器窗口内                            if (tag === "img") {                                //图片，改变src                                callback(o.attr("src", url));                                    } else {                                o.load(url, {}, function() {                                    callback(o);                                });                            }                                } else {                            // 无地址，直接触发回调                            callback(o);                        }                        data.obj = null;                        }                }            });            };        //事件触发        //加载完毕即执行        loading();        //滚动执行        params.container.bind("scroll", loading);    };})(jQuery);

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