前端一些cdn

axios:

<script src="https://cdn.jsdelivr.net/npm/axios/dist/axios.min.js"></script>

vue:

<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>

element -ui

<link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css">
<!-- 引入组件库 -->
<script src="https://unpkg.com/element-ui/lib/index.js"></script>