1在后端转换,调用API.

ajax瀑布流:

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
#ul1{
width: 1000px;
margin: 100px auto;
/*border: 1px solid #d8d8d8;*/
}
#ul1 li{
list-style: none;
width: 227px;
float: left;
margin-right: 10px; }
#ul1 li div{
margin-bottom: 10px;
border: 1px solid #000;
box-sizing: border-box;
}
#ul1 li img{
width: 225px; }
</style>
<script type="text/javascript">
// 封装ajax方法
function ajax(method, url, data, success) {
var xhr = null;
try {
xhr = new XMLHttpRequest();
} catch (e) {
xhr = new ActiveXObject('Microsoft.XMLHTTP');
} if (method == 'get' && data) {
url += '?' + data;
} xhr.open(method,url,true);
if (method == 'get') {
xhr.send();
} else {
xhr.setRequestHeader('content-type', 'application/x-www-form-urlencoded');
xhr.send(data);
} xhr.onreadystatechange = function() { if ( xhr.readyState == 4 ) {
if ( xhr.status == 200 ) {
success && success(xhr.responseText);
} else {
alert('出错,Err:' + xhr.status);
}
} }
}
</script>
<script type="text/javascript">
window.onload=function(){ //1.初始化数据
var oUl=document.getElementById('ul1');
var aLi=oUl.getElementsByTagName('li'); var page=1; var b=true;
//var aLiLen=aLi.length; //2.通过数据文件接口getPics.php获取到数据,然后插入到li里面。
getlist(); function getlist(){
ajax('get','getPics.php','cpage='+page,function(data){ //var data=eval(data);
var data = JSON.parse(data); for(var i=0;i<data.length;i++){
var index2=getShort(); //通过一个函数,得到最短的li索引 var oDiv=document.createElement('div');//创建div节点 var oImg=document.createElement('img');//创建img节点
oImg.src=data[i].preview; //为新img节点增加src。宽高
oImg.style.width='225px';
oImg.style.height=data[i].height*(225/data[i].width)+'px';
oDiv.appendChild(oImg); //将img节点插入到div节点里面 var oP=document.createElement('p'); //新建p节点
oP.innerHTML=data[i].title;
oDiv.appendChild(oP); aLi[index2].appendChild(oDiv); //将新建的div节点插入到最短的li里面 } b=true; });
} //3.构造函数,对比得到最短的li,并且返回这个li的下标。
function getShort(){
var index=0;
var iH=aLi[index].offsetHeight; for(var i=1;i<aLi.length;i++){
if(aLi[i].offsetHeight<iH){
index=i;
iH=aLi[i].offsetHeight;
}
} return index;
} window.onscroll=function(){ var index2=getShort();
var oLishort=aLi[index2]; var scrollTop=document.documentElement.scrollTop || document.body.scrollTop; if((oLishort.offsetTop+oLishort.offsetHeight)<document.documentElement.clientHeight+scrollTop){
//alert('该加载了');
if(b){
b=false;
page++;
getlist();
} }
}; };
</script>
</head>
<body>
<ul id="ul1">
<li></li>
<li></li>
<li></li>
<li></li>
</ul>
</body>
</html>
<?php
header('Content-type:text/html; charset="utf-8"'); /*
API:
getPics.php 参数
cpage : 获取数据的页数
*/
$cpage = isset($_GET['cpage']) ? $_GET['cpage'] : 1; $url = 'http://www.wookmark.com/api/json/popular?page=' . $cpage; $content = file_get_contents($url);
$content = iconv('gbk', 'utf-8', $content); echo $content; ?>

2 使用script标签向另一个域上的资源进行请求,传递参数fn,保存将来要执行的js函数名。

搜索框:

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
div{
margin:30px;
}
*{
list-style:none;
}
#input{
color: lightcoral;
} a:hover{
color: lightgreen;
}
a{
text-decoration: none;
color: lightcoral;
}
</style>
<script type="text/javascript">
window.onload=function(){
var input=document.getElementById("input");
input.onkeyup=function(){
var newScript=document.createElement("script");
newScript.src='https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su?wd='+input.value+'&cb=fn';
document.body.appendChild(newScript);
} //
}
</script>
<script type="text/javascript">
function fn(data){
console.log(data);
// var newli=document.createElement("li");
var d=data.s[4];
var arr=data.s;
var len=arr.length;
console.log(len);
var html='';
for(var i=0;i<len;i++){
// var newli=document.createElement("li");
html+='<li><a href="https://www.baidu.com/s?wd='+arr[i]+'" target="_blank">'+arr[i]+'</a></li>'; }
var infoContainer=document.getElementById("infoContainer");
infoContainer.innerHTML=html;
console.log(d);
}
</script>
</head>
<body>
<div id="wrap">
<input type="text" name="" id="input" />
<ul id="infoContainer"> </ul>
</div>
</body>
</html>

调用百度接口,效果:

ajax跨域两个方法-LMLPHP

3 h5 xhr2方法

05-11 19:23
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