导出ES6模块中的多个类

我试图创建一个模块,导出多个ES6类。假设我有如下的目录结构:

my/
└── module/
├── Foo.js
├── Bar.js
└── index.js

Foo.jsBar.js分别导出一个默认的ES6类:

// Foo.js
export default class Foo {
// class definition
}


// Bar.js
export default class Bar {
// class definition
}

我现在把index.js设置成这样:

import Foo from './Foo';
import Bar from './Bar';


export default {
Foo,
Bar,
}

但是,我无法导入。我希望能够做到这一点,但类没有找到:

import {Foo, Bar} from 'my/module';

在ES6模块中导出多个类的正确方法是什么?

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在你的代码中试试这个:

import Foo from './Foo';
import Bar from './Bar';


// without default
export {
Foo,
Bar,
}

顺便说一下,你也可以这样做:

// bundle.js
export { default as Foo } from './Foo'
export { default as Bar } from './Bar'
export { default } from './Baz'


// and import somewhere..
import Baz, { Foo, Bar } from './bundle'

使用export

export const MyFunction = () => {}
export const MyFunction2 = () => {}


const Var = 1;
const Var2 = 2;


export {
Var,
Var2,
}




// Then import it this way
import {
MyFunction,
MyFunction2,
Var,
Var2,
} from './foo-bar-baz';

export default的不同之处在于你可以导出一些东西,并在你导入它的地方应用名称:

// export default
export default class UserClass {
constructor() {}
};


// import it
import User from './user'

希望这能有所帮助:

// Export (file name: my-functions.js)
export const MyFunction1 = () => {}
export const MyFunction2 = () => {}
export const MyFunction3 = () => {}


// if using `eslint` (airbnb) then you will see warning, so do this:
const MyFunction1 = () => {}
const MyFunction2 = () => {}
const MyFunction3 = () => {}


export {MyFunction1, MyFunction2, MyFunction3};


// Import
import * as myFns from "./my-functions";


myFns.MyFunction1();
myFns.MyFunction2();
myFns.MyFunction3();




// OR Import it as Destructured
import { MyFunction1, MyFunction2, MyFunction3 } from "./my-functions";


// AND you can use it like below with brackets (Parentheses) if it's a function
// AND without brackets if it's not function (eg. variables, Objects or Arrays)
MyFunction1();
MyFunction2();

@webdeb的答案对我不起作用,我在用Babel编译ES6时遇到了unexpected token错误,执行命名默认导出。

然而,这对我来说很管用:

// Foo.js
export default Foo
...


// bundle.js
export { default as Foo } from './Foo'
export { default as Bar } from './Bar'
...


// and import somewhere..
import { Foo, Bar } from './bundle'
要导出类的实例,可以使用以下语法:

// export index.js
const Foo = require('./my/module/foo');
const Bar = require('./my/module/bar');


module.exports = {
Foo : new Foo(),
Bar : new Bar()
};


// import and run method
const {Foo,Bar} = require('module_name');
Foo.test();
// export in index.js
export { default as Foo } from './Foo';
export { default as Bar } from './Bar';


// then import both
import { Foo, Bar } from 'my/module';

对于同一个js文件中的多个classes,从@wordpress/element扩展Component,你可以这样做:

// classes.js
import { Component } from '@wordpress/element';


const Class1 = class extends Component {
}


const Class2 = class extends Component {
}


export { Class1, Class2 }

并在另一个js文件中导入它们:

import { Class1, Class2 } from './classes';

你能做到。 export{className, className and so}