https://zh.javascript.info/modules-intro

    1. # point.js
    2. export function point(){
    3.     console.log("point")
    4. }
    1. # query.js
    2. import {point} from './point.js'
    3. export function query(){
    4.     point();
    5. }
    1. # index.html
    2. <body>
    3.     <script type="module">
    4.        import {query} from './js/query.js'
    5.        query();
    6.     </script>
    7. </body>