jscodeshift

The jscodeshift is an interesting piece of work.

It is a transformation runner, it enables to write automated code upgrade tools.

Facebook uses it in order to upgrade the React application to follow the API versions.

• jscodeshift on github

Example

To automate the upgrade of your createComponent based React components:

npm i -g jscodeshift
git clone https://github.com/reactjs/react-codemod.git
cd react-codemod
npm i

Then to perform a transformation on your code:

jscodeshift -t react-codemod/transforms/class.js path/to/components

This will "magically" upgrade you React component to a ES2016 class React upgrade guidelines.