ES6 模块语法:是否可以将 * 作为 Name from ... 导出? [英] ES6 module syntax: is it possible to `export * as Name from ...`?

问题描述

见问题标题.我找到了一个很好的参考，用于export的形式，但我还没有看到我正在寻找.

See question title. I found a great reference for the forms of export available, but I have not seen what I'm looking for.

是否可以执行以下操作?

Is it possible to do something like the following?

// file: constants.js
export const SomeConstant1 = 'yay';
export const SomeConstant2 = 'yayayaya';

// file: index.js
export * as Constants from './constants.js';

即这将在 index.js 内提供一个命名导出 Constants，其中包含来自 constants.js 的所有命名导出.

I.e. this would provide a named export Constants inside of index.js containing all of the named exports from constants.js.

这个答案似乎表明它不是可能在 TypeScript 中；纯 JavaScript 也是一样吗?

This answer seems to indicate it's not possible in TypeScript; is the same true for pure JavaScript?

(这个例子有点做作；实际上我试图有一个 prop-types.js 模块，它使用命名导出在 React 包中供内部使用，但也导出 propPropTypes 下的类型定义供外部使用.为了问题，我试图简化.)

(This example is a bit contrived; in reality I'm trying to have a prop-types.js module that uses named exports for internal use within the React package, but also exports the prop type definitions under PropTypes for external consumption. I tried to simplify for the sake of the question.)

推荐答案

不，在 JS 中也是不允许的，但是有 添加它的提议.现在，只需使用导入本地变量并导出的两步过程:

No, it's not allowed in JS either, however there is a proposal to add it. For now, just use the two-step process with importing into a local variable and exporting that:

// file: constants.js
export const SomeConstant1 = 'yay';
export const SomeConstant2 = 'yayayaya';

// file: index.js
import * as Constants from './constants.js';
export {Constants};

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