时间:1.2个小时左右
代码:154行左右
博客:1
知识点:asyn函数基本用法
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<script type="text/javascript" src="js/axios.js"></script>
<script type="text/javascript">
/*
async/await 处理异步操作：
async函数返回一个Promise实例对象
await后面可以直接跟一个 Promise实例对象
*/
axios.defaults.baseURL = 'http:localhost:3000';
// axios.get('adata').then(function(ret){
// console.log(ret.data)
// })
// async function queryData() {
// var ret = await axios.get('adata');
// // console.log(ret.data)
// return ret.data;
// }
async function queryData() {
var ret = await new Promise(function(resolve, reject){
setTimeout(function(){
resolve('nihao')
},1000);
})
// console.log(ret.data)
return ret;
}
queryData().then(function(data){
console.log(data)
})
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<script type="text/javascript" src="js/axios.js"></script>
<script type="text/javascript">
/*
async/await处理多个异步任务
*/
axios.defaults.baseURL = 'http://localhost:3000';
async function queryData() {
var info = await axios.get('async1');
var ret = await axios.get('async2?info=' + info.data);
return ret.data;
}
queryData().then(function(data){
console.log(data)
})
</script>
</body>
</html>