新的版本Babel的Namespace的改变/Update

前提

如何安装react:

https://medium.freecodecamp.org/part-1-react-app-from-scratch-using-webpack-4-562b1d231e75

新的babal的namespace在之前有个@(babel 8.x以上)

The recent Babel upgrade to version 7 changed the namings of the node packages.

For instance, now you have to install npm install --save-dev @babel/core @babel/preset-env and npm install --save-dev @babel/preset-react to get it working with React.

Then you can use these in your .babelrc file:

{
  "presets": [
    "@babel/preset-env",
    "@babel/preset-react"
  ]
}

Or as alternative, when not having a .babelrc, in your package.json:

...
"keywords": [],
"author": "",
"license": "ISC",
"babel": {
  "presets": [
    "@babel/preset-env",
    "@babel/preset-react"
  ]
},
"devDependencies": {
...