[英]Export multiple classes in ES6 modules
I'm trying to create a module that exports multiple ES6 classes.我正在尝试创建一个导出多个 ES6 类的模块。 Let's say I have the following directory structure:
假设我有以下目录结构:
my/
└── module/
├── Foo.js
├── Bar.js
└── index.js
Foo.js
and Bar.js
each export a default ES6 class: Foo.js
和Bar.js
分别导出一个默认的 ES6 class:
// Foo.js
export default class Foo {
// class definition
}
// Bar.js
export default class Bar {
// class definition
}
I currently have my index.js
set up like this:我目前的
index.js
设置如下:
import Foo from './Foo';
import Bar from './Bar';
export default {
Foo,
Bar,
}
However, I am unable to import.但是,我无法导入。 I want to be able to do this, but the classes aren't found:
我希望能够做到这一点,但找不到类:
import {Foo, Bar} from 'my/module';
What is the correct way to export multiple classes in an ES6 module?在 ES6 模块中导出多个类的正确方法是什么?
Try this in your code:在你的代码中试试这个:
import Foo from './Foo';
import Bar from './Bar';
// without default
export {
Foo,
Bar,
}
Btw, you can also do it this way:顺便说一句,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'
Using export
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';
The difference with export default
is that you can export something, and apply the name where you import it:与
export default
的区别在于您可以导出某些内容,并在导入时应用名称:
// export default
export default class UserClass {
constructor() {}
};
// import it
import User from './user'
Hope this helps:希望这有帮助:
// 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's answer didn't work for me, I hit an unexpected token
error when compiling ES6 with Babel, doing named default exports. @webdeb 的回答对我不起作用,我在使用 Babel 编译 ES6 时遇到了
unexpected token
错误,执行命名的默认导出。
This worked for me, however:然而,这对我有用:
// 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'
// 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';
For multiple classes
in the same js
file, extending Component
from @wordpress/element
, you can do that :对于同一个
js
文件中的多个classes
,从@wordpress/element
扩展Component
,您可以这样做:
// classes.js
import { Component } from '@wordpress/element';
const Class1 = class extends Component {
}
const Class2 = class extends Component {
}
export { Class1, Class2 }
And import them in another js
file :并将它们导入到另一个
js
文件中:
import { Class1, Class2 } from './classes';
you can do.你可以做。 export{className, className and so on}
导出{className、className 等}
For exporting the instances of the classes you can use this syntax:要导出类的实例,您可以使用以下语法:
// 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();
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