关于懒加载这个功能，我不是第一次折腾它啦 相信也不是最后一次 嗯.. 记得之前用香港主机那会，网站访问速度简直不能用慢来形容(128元/年，慢的离谱,在淘宝找到他们家的。通过淘宝客服功能沟通 服务都能超叼那种) 避坑 https://www.68145.com/(追艺网络) 然而目前我的访问速度使用后效果并不显著 总之，这个教程针对网站速度慢的朋友有帮助
不扯了，教程开始
1、新建一个lazyload.js文件
lazyload.js可直接调用我的，但是最好还是自己保存一份
我的js： https://www.xxi.icu/usr/themes/Brave/base/js/lazyload.js
/*! Lazy Load 1.9.7 - MIT license - Copyright 2010-2015 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:!1,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);2、放网站/body前面
直接丢后台 底部自定义内容 也行
<!-- 全站懒加载 -->
<script src="你的/lazyload.js路径"></script>
<script>
//js出始化lazyload并设置图片显示方式
$(function() {$("img.lazy").lazyload({effect: "fadeIn", threshold: 200});});
//pjax开启后的pjax回调
$(document).on('pjax:complete', function() {
$("img.lazy").lazyload({
effect: "fadeIn",
threshold: 200
});
});
</script>3、调用方法
代码语言：javascript复制<img class="lazy" src="加载动画gif" data-original="需要显示的图片路径">必须引用CSSlazy
加载动画就是图片没出来之前覆盖一张加载图片在上面，待图片加载出来即可消失（可以留空）
data-original="图片路径"（你需要显示的图片地址）
大概作用就是抑制图片加载，提高访问速度，可以理解成 看到哪加载到哪,不多加载任何一张不必要的图片
效果图查看：https://www.xxi.icu(ctrl f5)
