export 和 import报错Uncaught SyntaxError: Unexpected token {

Question

文件目录

 - imort.html
 - import.js
 - index.js

imort.html

<script src="index.js"></script>

index.js

import {a} from './import'
console.log(a);

import.js

export let a = 'zhang';

代码很简单但是报错 Uncaught SyntaxError: Unexpected token {
请问是什么原因？

Answer 1

imort.html中直接引入，type="module"

<script type="module">
    import {a} from './import'
    console.log(a);
</script>

Answer 2

浏览器环境不能这么写