Babel 7 - ReferenceError: regeneratorRuntime 未定义 [英] Babel 7 - ReferenceError: regeneratorRuntime is not defined

问题描述

我有一个应用程序，它是一个节点后端和一个 React 前端.

I have an application that is a node backend and a react frontend.

当我尝试构建/运行我的节点应用程序时出现以下错误.

I get the following error when i try to build/run my node application.

节点:v10.13.0

错误:

dist/index.js:314regeneratorRuntime.mark(function _callee(productId) {^

dist/index.js:314 regeneratorRuntime.mark(function _callee(productId) { ^

ReferenceError: regeneratorRuntime 未定义

ReferenceError: regeneratorRuntime is not defined

.babelrc

{
    "presets": [    [
        "@babel/preset-env", {
          "targets": {
            "node": "current"
          },
        }
      ], "@babel/preset-react"],
    "plugins": [
        "@babel/plugin-proposal-class-properties"
    ]
}

webpack.config.js

{
        mode: "development",
        entry: "./src/index.js",
        target: "node",
        externals: [nodeExternals()], // in order to ignore all modules in node_modules folder
        stats: {
            colors: true
        },
        devtool: "source-map",

        output: {
            path: path.resolve(__dirname, "dist"),
            filename: "index.js",
            sourceMapFilename: "index.js.map"
        },
        module: {
            rules: [
                {
                    enforce: "pre",
                    test: /.js$/,
                    exclude: /node_modules/,
                    loader: "eslint-loader",
                },
                {
                    test: /.m?js$/,
                    exclude: /(node_modules|bower_components)/,
                    use: {
                        loader: "babel-loader",
                        options: {
                            presets: ["@babel/preset-env"]
                        }
                    }
                }
            ],
        },
        node: {
            __dirname: false,
            __filename: false,
        },

        "plugins": [
            new CleanWebpackPlugin(),
            new WebpackShellPlugin({
                onBuildStart: [],
                onBuildEnd: ["nodemon dist/index.js"]
            }),

        ]

    },

package.json

 "dependencies": {
    "connect": "^3.6.6",
    "cors": "^2.8.5",
    "dotenv": "^6.1.0",
    "express": "^4.16.4",
    "hellojs": "^1.17.1",
    "i18n-iso-countries": "^3.7.8",
    "morgan": "^1.9.1",
    "react": "^16.6.3",
    "react-dom": "^16.6.3",
    "request": "^2.88.0",
    "request-promise-native": "^1.0.5",
    "serve-static": "^1.13.2",
    "vhost": "^3.0.2"
  },
  "devDependencies": {
    "@babel/cli": "^7.1.5",
    "@babel/core": "^7.1.6",
    "@babel/plugin-proposal-class-properties": "^7.1.0",
    "@babel/preset-env": "^7.1.6",
    "@babel/preset-react": "^7.0.0",
    "babel-eslint": "^10.0.1",
    "babel-loader": "^8.0.4",
    "clean-webpack-plugin": "^1.0.0",
    "copy-webpack-plugin": "^4.6.0",
    "css-loader": "^1.0.1",
    "eslint": "^5.9.0",
    "eslint-config-google": "^0.10.0",
    "eslint-loader": "^2.1.1",
    "eslint-plugin-react": "^7.11.1",
    "extract-loader": "^3.0.0",
    "file-loader": "^2.0.0",
    "node-sass": "^4.10.0",
    "sass-loader": "^7.1.0",
    "style-loader": "^0.23.1",
    "webpack": "^4.26.0",
    "webpack-cli": "^3.1.2",
    "webpack-node-externals": "^1.7.2",
    "webpack-shell-plugin": "^0.5.0"
  }

推荐答案

更新答案:

如果您使用的是 Babel 7.4.0 或更新版本，那么 @babel/polyfill 已经 已弃用.相反，您需要在主 js 文件(可能是 index.js 或类似文件)的顶部使用以下内容:

If you are using Babel 7.4.0 or newer, then @babel/polyfill has been deprecated. Instead, you will want to use the following at the top of your main js file (likely index.js or similar):

import "core-js/stable";
import "regenerator-runtime/runtime";

使用 npm 安装这些软件包:

Install these packages either with npm:

npm install --save core-js
npm install --save regenerator-runtime    

或用纱线:

yarn add core-js
yarn add regenerator-runtime

原答案:

我刚刚遇到了这个问题，并遇到了以下解决方案:

I just encountered this problem and came across the following solution:

在 package.json 中，我有 @babel/polyfill 作为依赖项.但是，在我的 index.js(我的主要 js 文件)中，我忽略了将以下行放在顶部:

In package.json I had @babel/polyfill as a dependency. However, in my index.js (My main js file) I had neglected to place the following line at the the top:

导入'@babel/polyfill'

导入后，一切正常.

我不需要像其他答案建议的那样安装 babel-runtime.

I did not need to install babel-runtime as other answers are suggesting.

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