• 在安裝babel的時(shí)候，遇到個(gè)Error: Cannot find module '@babel/core’問題，查了很多資料才解決，希望能夠幫助到各位兄弟。

問題產(chǎn)生的原因

babel-loader和babel-core版本不對應(yīng)所產(chǎn)生的，

• babel-loader 8.x對應(yīng)babel-core 7.x
• babel-loader 7.x對應(yīng)babel-core 6.x

如何解決

1、 卸載舊的babel-core
npm un babel-core
2、 安裝新的babel-core
npm i -D @babel/core
3、 卸載舊的babel-preset
npm un babel-preset-env
npm un babel-preset-stage-0
4、 安裝新的babel-preset
npm i @babel/preset-react
npm i @babel/preset-env
npm i babel-preset-mobx
5、 卸載舊的babel-plugin
npm un babel-plugin-transform-runtime
6、 安裝新的babel-plugin
npm install --save-dev @babel/plugin-proposal-object-rest-spread
npm install --save-dev @babel/plugin-transform-runtime
npm install --save @babel/runtime
7、 修改.babelrc文件

{
    "presets": ["@babel/preset-env", "@babel/preset-react", "mobx"],
    "plugins": [
        "@babel/plugin-proposal-object-rest-spread",
        "@babel/plugin-transform-runtime"
    ]
}

• 如果你按上述命令安裝完后，相應(yīng)的版本應(yīng)該如下圖所示，問題也應(yīng)該解決了。

"devDependencies": {
    "@babel/core": "^7.2.2",
    "@babel/plugin-proposal-object-rest-spread": "^7.2.0",
    "@babel/plugin-transform-runtime": "^7.2.0",
    "@babel/preset-env": "^7.2.3",
    "@babel/preset-react": "^7.0.0",
    "babel-loader": "^8.0.4",
    "babel-preset-mobx": "^2.0.0",
    "css-loader": "^2.1.0",
    "file-loader": "^3.0.1",
    "popper.js": "^1.14.6",
    "style-loader": "^0.23.1",
    "url-loader": "^1.1.2",
    "webpack": "^4.28.2",
    "webpack-cli": "^3.1.2"
  },
  "dependencies": {
    "@babel/runtime": "^7.2.0",
    "bootstrap": "^4.2.1",
    "jquery": "^3.3.1"
  }