如何安装babel-polyfill库？ [英] How do I install the babel-polyfill library?

问题描述

我刚刚开始使用Babel将我的ES6 javascript代码编译成ES5。当我开始使用Promises时，看起来它不起作用。 Babel网站声明支持通过polyfill承诺。

I just started to use Babel to compile my ES6 javascript code into ES5. When I start to use Promises it looks like it's not working. The Babel website states support for promises via polyfills.

没有任何运气，我试图添加：

Without any luck, I tried to add:

require("babel/polyfill");

或

import * as p from "babel/polyfill";

这样我的应用程序引导就会出现以下错误：

With that I'll get the following error on my app bootstrapping:

无法找到模块'babel / polyfill'

Cannot find module 'babel/polyfill'

我搜索了模块，但似乎我在这里缺少一些基本的东西。我也尝试添加旧的和好的蓝鸟NPM，但看起来它不起作用。

I searched for the module but it seems I'm missing some fundamental thing here. I also tried to add the old and good bluebird NPM but it looks like it's not working.

如何使用Babel的polyfills？

How to use the polyfills from Babel?

推荐答案

这在babel v6中有所改变。

This changed a bit in babel v6.

来自文档：

polyfill将模拟完整的ES6环境。使用babel-node时会自动加载此polyfill。

The polyfill will emulate a full ES6 environment. This polyfill is automatically loaded when using babel-node.

安装：

$ npm install babel-polyfill

Node / Browserify / Webpack中的用法： < br>
要包含polyfill，您需要在应用程序入口点的顶部。

require（babel-polyfill）;

在浏览器中使用


可从 dist / polyfill获取.js babel-polyfill npm版本中的文件。这需要包含在所有编译的Babel代码之前。您可以将其添加到已编译的代码中，也可以将其包含在< script> 之前。

Usage in Browser:
Available from the dist/polyfill.js file within a babel-polyfill npm release. This needs to be included before all your compiled Babel code. You can either prepend it to your compiled code or include it in a <script> before it.

注意：不要要求这通过browserify等，使用 babel-polyfill 。

NOTE: Do not require this via browserify etc, use babel-polyfill.

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