最近面试 还是回到最基础的JS基础入门 自己对着ajax结合Promise又撸了一遍代码
<!--
* @Description: 描述
* @Version: 1.0
* @Autor: Nanke_南柯
* @Date: 2020-12-03 05:51:01
* @LastEditors: Nanke_南柯
* @LastEditTime: 2020-12-03 06:03:25
-->
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script>
function ajax(url) {
return new Promise((resolve, reject) => {
const xhr = new XMLHttpRequest;
xhr.open('GET', url, true)
xhr.onreadystatechange = function () {
if (xhr.readyState === 4) {
if (xhr.status === 200) {
resolve(xhr.responseText)
} else if (xhr.status === 404) {
reject(new Error('404 of Founc'))
}
}
}
xhr.send(null)
})
}
ajax("./test.json").then(res => {
console.log('数据获取成功', res);
}).catch(error => {
console.log('数据获取失败', error);
})
</script>
</body>
</html>
成功打印!
顺便介绍下我vscode的新主题 “Community Material Theme”，这配色简直炒鸡无敌喜欢！！！！！！！！！！！！！！！！