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Module not found: Error: Can't resolve 'core-js/modules/es6.object.create'

See original GitHub issue

Having issues trying to build server side react node js application.

ERROR in ./src/external/BaseComponent.js
Module not found: Error: Can't resolve 'core-js/modules/es6.object.create' in 'C:\Users\Too\WebstormProjects\react_back\src\external'
 @ ./src/external/BaseComponent.js 4:0-43
 @ ./src/server.js
 @ ./src/index.js

Seemed like its something about core-js version. It generates polyfill requires like this:

require("core-js/modules/es6.symbol");

But actually they are so:

core-js/modules/es.symbol.js

npm ls core-js

react_back@1.0.0 C:\Users\Too\WebstormProjects\react_back
+-- @babel/preset-env@7.4.2
| -- core-js-compat@3.0.0
|   -- core-js@3.0.0  deduped
-- core-js@3.0.0

Webpack config

const path = require('path');
module.exports = {
    entry: './src/index.js',
    mode: 'development',
    output: {
        path: path.resolve(__dirname, 'assets'),
        filename: "[name].js"
    },
    module: {
        rules: [
            {
                test: /\.js$/,
                exclude: /node_modules/,
                loader: "babel-loader"
            }
        ]
    },
    target: 'node',
    node: {
        console: true
    },
    externals: ['express'],
};

package.json

{
  "name": "react_back",
  "version": "1.0.0",
  "description": "",
  "main": "src/index.js",
  "keywords": [],
  "author": "",
  "license": "ISC",
  "scripts": {
    "start": "node src/index.js",
    "pack": "webpack --config webpack.config.babel.js",
    "babel": "babel src -d views",
    "build": "npm run pack && npm run babel"
  },
  "dependencies": {
    "core-js": "^3.0.0",
    "express": "^4.16.3",
    "react": "^16.8.6",
    "react-dom": "^16.8.6",
    "react-redux": "^5.0.7",
    "redux": "^3.7.2",
    "redux-thunk": "^2.3.0"
  },
  "devDependencies": {
    "@babel/cli": "^7.1.0",
    "@babel/core": "^7.1.0",
    "@babel/preset-env": "^7.1.0",
    "@babel/preset-react": "^7.0.0",
    "babel-loader": "^8.0.2",
    "webpack": "^4.20.2",
    "webpack-cli": "^3.1.2"
  }
}

.babelrc

{
  "presets": [
    ["@babel/preset-env", {
      "useBuiltIns": "usage",
      "debug": true
    }],
    "@babel/preset-react"
  ]
}

Any ideas?

Issue Analytics

State:
Created 4 years ago
Reactions:3
Comments:13 (5 by maintainers)

Top GitHub Comments

3reactions

nicolo-ribaudocommented, Mar 30, 2019

By default Babel injects imports to core-js@2, you need to install that. Or better, you can update preset-env to ^7.4.0 and enable the corejs: 3 option of that preset.

1reaction

milesjcommented, Apr 2, 2019

Have you all read the core-js + babel migration guide? https://github.com/zloirock/core-js/blob/master/docs/2019-03-19-core-js-3-babel-and-a-look-into-the-future.md

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