脚本宝典收集整理的这篇文章主要介绍了javascript代码实例教程-瀑布流 ajax 预加载 json，脚本宝典觉得挺不错的，现在分享给大家，也给大家做个参考。

小宝典致力于为广大程序猿（媛）提供高品质的代码服务，请大家多多光顾小站，小宝典在此谢过。

pbl.json【模拟后台json数据】:

 

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"height": "460",
"image": "https://www.wookmark.com/images/original/512043_wookmark.jpg",
"preview": "https://www.wookmark.com/images/thumbs/512043_wookmark.jpg"
},
{
"id": "512047",
"title": "spalvierdelciotto designs a LED desk lamp for lexon",
"referer": "https://www.designboom.com/design/spalvierdelciotto-led-desk-lamp-05-18-2015/",
"url": "https://www.wookmark.com/image/512047/spalvierdelciotto-designs-a-led-desk-lamp-for-lexon",
"width": "818",
"height": "472",
"image": "https://www.wookmark.com/images/original/512047_wookmark.jpg",
"preview": "https://www.wookmark.com/images/thumbs/512047_wookmark.jpg"
},
{
"id": "512103",
"title": "Changes",
"referer": "https://overcalm.co.vu/post/119516785288",
"url": "https://www.wookmark.com/image/512103/changes",
"width": "548",
"height": "629",
"image": "https://www.wookmark.com/images/original/512103_wookmark.png",
"preview": "https://www.wookmark.com/images/thumbs/512103_wookmark.png"
},
{
"id": "512182",
"title": "Unseen Cuba by Marius Jovai?a",
"referer": "https://aerial.photogrist.com/marius-jovaisa/",
"url": "https://www.wookmark.com/image/512182/unseen-cuba-by-marius-jovai-a",
"width": "1180",
"height": "785",
"image": "https://www.wookmark.com/images/original/512182_wookmark.jpg",
"preview": "https://www.wookmark.com/images/thumbs/512182_wookmark.jpg"
},
{
"id": "512193",
"title": "It looks better in black",
"referer": "https://www.faceBook.com/itlooksbetterinblack/photos/pb.616706738402860.-2207520000.1432248795./874942449245953/?type=1&theater",
"url": "https://www.wookmark.com/image/512193/it-looks-better-in-black",
"width": "500",
"height": "750",
"image": "https://www.wookmark.com/images/original/512193_wookmark.png",
"preview": "https://www.wookmark.com/images/thumbs/512193_wookmark.png"
},
{
"id": "512225",
"title": "Matt's Mini-ITX - Album on imgur",
"referer": "https://imgur.com/a/e8lFa",
"url": "https://www.wookmark.com/image/512225/matt-s-mini-itx-album-on-imgur",
"width": "3264",
"height": "2448",
"image": "https://www.wookmark.com/images/original/512225_wookmark.jpg",
"preview": "https://www.wookmark.com/images/thumbs/512225_wookmark.jpg"
}
]

 

htML文件【这里使用jquery】：

 

<script type="text/javascript" src="jquery1.42.min.js"></script>
<script type="text/javascript">
$(function(){
VAR iNow=1;
var imgs=[];
function loadMeinv(){
$.ajax({
url:"pbl.json",
type:"post",
success:function(data)
{
// alert(iNow);
imgs=[];//清空数组
for(var v=iNow-1;v {
if(data[v]==undefined)
{
$("#load").fadeOut();//如果没有数据了 就隐藏load，并且不再加载
return false;
}
else
{
imgs.push([data[v]["image"],data[v]["title"],data[v]["url"]]);
}


}
//console.table(imgs);
var prePress=0;//用来判断是否加载完数组里面的数据
if(iNow {
iNow++;
for(var i=0;i {
(function(n){ //执行加载图片
var yImg=new Image();
yImg.src=imgs[n][0];
yImg.onload=function()
{
// var dd=document.createElement("li");
// dd.innerHTML="";
var dd='

'+imgs[n][1]+'

';
$minUl = getMinUl();
$minUl.append(dd);
prepress++;
if(prepress>=imgs.length) //控制是否已经执行完数组里面的内容了
{
$("#load").fadeOut();
}
};
})(i);


}
}
else
{
$("#load").fadeOut();
return false;
}
// console.log(iNow);
}
})
}
loadMeinv();
$(window).bind("scroll",function(){
var $minUl = getMinUl();
if($minUl.height() <= $(window).scrollTop()+$(window).height()){
//当最短的ul的高度比窗口滚出去的高度+浏览器高度大时加载新图片
$("#load").fadeIn();
// setTimeout(function(){
loadMeinv();
// $("#load").fadeOut();
// },2000);
}
});
function getMinUl(){//每次获取最短的ul,将图片放到其后
var $arrUl = $("#container .col");
var $minUl =$arrUl.eq(0);
$arrUl.each(function(index,elem){
if($(elem).height()<$minUl.height()){
$minUl = $(elem);
}
});
return $minUl;
}
})
</script>

 

觉得可用，就经常来吧！ 脚本宝典 欢迎评论哦！ js脚本，巧夺天工，精雕玉琢。小宝典献丑了！

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