Babel编译错误：找不到模块core-js / library / fn / get-iterator

Question

This is my directory structure:

├───demo
│   ├───entry
│   │   ├───index.js
│   │   ├───tap.js
│   │   └───util.js
│   ├───node_modules
│   ├───index.html
│   ├───package.json
│   └───webpack.config.js
├───src
│   ├───tap.js
│   └───util.js
├───index.js
└───package.json

In demo/entry/index.js I have

import tap from '../../src/tap';

When compiling this, babel throws error

ERROR in ../src/tap.js
Module build failed: Error: Cannot find module 'core-js/library/fn/get-iterator'

But it works if I import like this

import tap from './tap';

The file ./tap.js and ../../src/tap are the same.

Is the problem node_modules ? Because in demo directory, the babel and anything else is in node_modules , so I can import any file I like. But src/tap.js has no such parent or sibling directory like node_modules , so it will trigger this error.

Answer 1

Try to install babel-loader and babel-core as dev-dependency:

npm install babel-core babel-loader --save-dev

Also you need to update your .babelrc

{ 
    "presets" : ["es2015", "react"]
}

It works good for me. Good luck ;)

Answer 2

我刚安装了core-js，它就起作用了。

Answer 3

Maybe you did not install core-js. I used to meet this problem.

• First, delete your node_modules directory contents
• Second, execute yarn install if you had installed yarn
• Third, check your webpack version and babel-loader version, webpack 1.x can must be related to babel-loader 6.x

Answer 4

更新到节点版本11.10.0 （当前版本）对我11.10.0 。