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老师批语：
从服务器端获取JSON格式字符串并解决到前端页面中显示
下面是html代码:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>模拟获取服务器数据</title>
<style>
button{
background-color: cornflowerblue;
}
button:hover{
color: orangered;
}
/*#h3-1{*/
/*display: none;*/
/*}*/
</style>
</head>
<body>
<h3 >点击事件模拟获取服务器数据</h3>
<button>点我获取数据</button>
<h3 id="h3-1"></h3>
<script>
//获取button按钮
var btn = document.getElementsByTagName('button').item(0);
//生成一个Ajax对象
var request = new XMLHttpRequest();
//给按钮添加事件
btn.addEventListener('click',getData,false);
//事件对应函数
function getData() {
request.addEventListener('readystatechange',show,false);
request.open('get','admin/demo1.php',true);
request.send(null);
}
var h3 = document.getElementsByTagName('h3').item(1);
function show() {
//
// if (h3.style.display === "none") {
// h3.style.display = "block";
// } else {
// h3.style.display = "none";
// }
if (request.readyState === 4){
var obj = JSON.parse(request.responseText);
console.log(obj);
if (h3.style.display === "none") {
h3.style.display = "block";
h3.innerHTML = obj.name + ',PHP成绩是: ' + obj.grade.php + ',最喜欢: ' + obj.hobby[1];
} else {
h3.style.display = "none";
h3.innerHTML = '';
}
}
}
</script>
</body>
</html>点击 "运行实例" 按钮查看在线实例
php代码模拟服务器数据:
<?php
$json = '{
"name": "小金莲",
"age": 23,
"isMarried": true,
"sweetheart": null,
"grade": {
"javascript": 80,
"php": 90
},
"hobby": ["做烧饼", "下毒", "饮酒作乐"]
}';
echo $json;点击 "运行实例" 按钮查看在线实例
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