使用transform-async-to-generator插件时，未定义Babel - regeneratorRuntime [英] Babel - regeneratorRuntime is not defined, when using transform-async-to-generator plugin

问题描述

我无法正确设置babel以使用async / await。

I am not able to setup babel correctly for the usage of async / await.

我使用的是babel 7和webpack 4.

I am using babel 7 and webpack 4.

如果可能，我不想使用babel-polyfill！

I do not want to use babel-polyfill if possible!

我的babelrc文件：

My babelrc file:

{
    "presets": [[
        "@babel/env",
        {"modules": false}
    ]],
    "plugins": [
      "syntax-dynamic-import",
      "transform-async-to-generator"
    ]
}

代码：

async function init() {
  const loaderData = await initLoader();
  initCmp(loaderData)
    .then(initApi(loaderData.key))
    .catch();
}
init();

错误：

refactor.main.js:18 Uncaught ReferenceError: regeneratorRuntime is not defined
    at eval (refactor.main.js:18)
    at eval (refactor.main.js:47)
    at Object../client/refactor.main.js (cmp.bundle.js:312)
    at __webpack_require__ (cmp.bundle.js:62)
    at eval (main.js:6)
    at Object../client/main.js (cmp.bundle.js:300)
    at __webpack_require__ (cmp.bundle.js:62)
    at cmp.bundle.js:179
    at cmp.bundle.js:182

推荐答案

此处的最新文档非常清楚：
https ：//babeljs.io/docs/en/next/babel-plugin-transform-runtime

The latest documentation here is pretty clear: https://babeljs.io/docs/en/next/babel-plugin-transform-runtime

对我来说有用的是安装两个包用于构建和运行时（浏览器的最终脚本）：

What worked for me is installing the two packages for build and for runtime (the final script for the browser):

npm install --save-dev @babe l / plugin-transform-runtime

npm install --save @ babel / runtime

在我的webpack配置的插件数组中，我刚添加了@ babel / plugin-transform-runtime，没有任何选项。 （请同时查看上面链接的文档，因为一些选项（您可能会在较旧的教程或答案中找到）已被删除。）

In the plugin Array of my webpack configuration I just added '@babel/plugin-transform-runtime' without any options. (Please also have a look at the documentation linked above, since some options (that you might find in older tutorials or answers) have been removed.)

plugins: [
'@babel/plugin-transform-runtime'
]

我现在可以使用异步函数而不会出错，并且它没有在生成版本中添加太多代码。

I now can use async functions without errors, and it didn't add much code in the production build.

这篇关于使用transform-async-to-generator插件时，未定义Babel - regeneratorRuntime的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！