js 中的导入导出 class

Question

我尝试在 js 中导入 class 时遇到问题：

//file 1
export default class myClass {
  constructor(){
    this.name = "name1";
  }
  saysHello(){
   console.log("hello"+this.name1);
  }
};

//file 2
import { myClass } from 'file1.js'

//I have tried different alternatives

// alternative 1:
var v1 = new myClass();
v1.saysHello()

//alternative 2:
myClass.saysHello()

//alternative 2:
var v1 = Object.create(myClass);

在所有替代方案中我都有同样的错误：

Uncaught ReferenceError: can't access lexical declaration 'myClass' before initialization http://127.0.0.1:5500/js/file2.js

在html中：

  <script type="module" src="./js/file1.js"></script>
  <script type="module" src="./js/file2.js"></script>

Answer 1

//file 2
import  myClass from './file-1.js'

//I have tried different alternatives

// alternative 1:
var v1 = new myClass();
v1.saysHello()

js 中的导入导出 class

Import-Export class in js

javascript

import

export

object