Zero config React + Typescript + CSS Modules + JEST with create-react-app

October 30, 2018

In the beginning of 2018 I explored a tool called Poi that offered a trendy zero config setup for new apps. I tried it out and wrote a blogpost on how to quickly set up an app with my favourite tooling at that time —

  • React for performant views;

  • Typescript for eloquent and less error prone JS;

  • CSS Modules for encapsulated styles;

  • Jest and Enzyme for unit testing.

Since that time zero config became a trend. Create React App, a CLI tool that helps JavaScript developers create react apps with no build configuration, moved in the similar direction but required more config and effectively “ejection” to come up with a list of tooling above.

Since CRA v2, CSS modules are supported out of the box. React scripts allow to extend initial CRA setup and add any custom boilerplate onboard.

It turns out that you can create a similar setup with React + TS + CSS Modules and Jest in a couple of minutes.

For typescript react app I chose a popular version of react scripts that was started by microsoft but later moved to wmonk’s github repo — https://github.com/wmonk/create-react-app-typescript.

React / TypeScript / CSS Modules

npx create-react-app react-ts --scripts-version=react-scripts-ts@next

Jest

"test": "react-scripts-ts test --env=jsdom --watchAll"
package.json

Enzyme

npm install enzyme enzyme-adapter-react-16 react-test-renderer -S
npm i @types/enzyme -D

Create src/setupTests.ts

import { configure } from 'enzyme';
import * as Adapter from 'enzyme-adapter-react-16';

configure({ adapter: new (Adapter as any)() });
src/setupTests.ts

References