babel

babel 困った時 Node.js environment

一番役にたったのは一番上のやつ

• https://babeljs.io/docs/en/babel-node

• https://jestjs.io/docs/en/getting-started#using-babel

• https://github.com/babel/example-node-server

• https://github.com/FormidableLabs/spectacle/issues/522

結論

npm install --save-dev @babel/core @babel/node

最初ずっと yarn でinstall してたんですけど, npm でしたら一発でした!!

エラー内容

Error: Requires Babel "^7.0.0-0", but was loaded with "6.26.3".

Error: Requires Babel "^7.0.0-0", but was loaded with "6.26.3". 
If you are sure you have a compatible version of @babel/core, 
it is likely that something in your build process is loading the wrong 
version. Inspect the stack trace of this error to look for 
the first entry that doesn't mention "@babel/core" or "babel-core" 
to see what is calling Babel. (While processing preset: 
"/Users/~/node_modules/@babel/preset-env/lib/index.js")