Latest commit 7707997 Sep 10, 2018


Babel jest plugin


If you are already using jest-cli, just add babel-jest and it will automatically compile JavaScript code using babel.

yarn add --dev babel-jest babel-core

Note: If you are using babel version 7 you have to install babel-jest with

yarn add --dev babel-jest 'babel-core@^7.0.0-0' @babel/core

If you would like to write your own preprocessor, uninstall and delete babel-jest and set the config.transform option to your preprocessor.


Note: this step is only required if you are using babel-jest with additional code preprocessors.

To explicitly define babel-jest as a transformer for your JavaScript code, map .js files to the babel-jest module.

"transform": {
  "^.+\\.jsx?$": "babel-jest"