26. ES6 Promise 简介
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script>
// 无法请求谁先谁后
// let user;
// $.get('https://api.github.com/users',data=>{
// console.log('fetched all user');
// user=data[0].login;
// })
// $.get(`https://api.github.com/users/${user}/repos`,data=>{
// console.log('fetched user repos');
// console.log(data);
// })
// 为了确保顺序就会把第二个请求放到第一个
// let user;
// $.get('https://api.github.com/users',data=>{
// console.log('fetched all user');
// user=data[0].login;
// $.get(`https://api.github.com/users/${user}/repos`,data=>{
// console.log('fetched user repos');
// console.log(data);
// })
// })
// 为了避免回调地狱，解决方案使用Promise，不管如何都会返回一个结果
</script>
</body>
</html>
axios
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<!-- <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/axios/0.16.2/axios.min.js"></script>
<script>
// 为了避免回调地狱，解决方案使用Promise，不管如何都会返回一个结果
let username;
// 这里返回一个Promise
const users= axios.get('https://api.github.com/users');
//then相当jquery的监听事件
users.then(response=>{
username = response.data[0].login;
return axios.get(`https://api.github.com/users/${username}/repos`);
}).then(reponse=>{
console.log(reponse.data);
}).catch(err=>{
console.log(err);
})
</script>
</body>
</html>
标签：ES6,console,log,笔记,api,user,简单,data,users From： https://www.cnblogs.com/hechunfeng/p/17173661.html