React Component Library

This serves as a component library and uses:

• Rollup
• TypeScript
• Scss

It also features:

• Storybook to help you create and show off your components
• Jest and React Testing Library enabling testing of the components

##First

npm i

Development

npm run sb

Testing

npm run test

Building

npm run build

Storybook

To run a live-reload Storybook server on your local machine:

npm run sb

To export your Storybook as static files:

npm run storybook:export

You can then serve the files under storybook-static using S3, GitHub pages, Express etc.

Generating New Components

I've included a handy NodeJS util file under util called create-component.js. Instead of copy pasting components to create a new component, you can instead run this command to generate all the files you need to start building out a new component. To use it:

npm run generate YourComponentName

This will generate:

/src
  /YourComponentName
    YourComponentName.tsx
    YourComponentName.stories.tsx
    YourComponentName.test.tsx
    YourComponentName.types.ts
    YourComponentName.module.scss
    index.ts

The default templates for each file can be modified under util/templates.

Don't forget to add the component to your index.ts exports if you want the library to export the component!

Installing Component Library Locally

Let's say you have another project (test-app) on your machine that you want to try installing the component library into without having to first publish the component library. In the test-app directory, you can run:

npm i --save ../react-component-library

which will install the local component library as a dependency in test-app. It'll then appear as a dependency in package.json like:

  ...
  "dependencies": {
    ...
    "react-component-library": "file:../react-component-library",
    ...
  },
  ...

Your components can then be imported and used in that project.

NOTE: After installing the component library locally, you may run into:

Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons:

You might have mismatching versions of React and the renderer (such as React DOM)
You might be breaking the Rules of Hooks
You might have more than one copy of React in the same app See for tips about how to debug and fix this problem.

This is the most commonly encountered problem people face when installing the library locally. This is most likely due to the third reason: You might have more than one copy of React in the app.

Normally when a library is published, dev dependencies are excluded. However, when the library is symlinked, all local dev depdendencies are persisted in the libraries node_modules (includes React). Your bundler may see two versions of React, one in the consuming app and one in the symlinked library. The solution is to have the component library use the React version in the consuming app. So from your component library folder, run:

npm link ../test-app/node_modules/react

OR, if you are using Webpack in app you can follow this GitHub comment.

Read more about this issue here.

Publishing

Hosting via NPM

First, make sure you have an NPM account and are logged into NPM using the npm login command.

Then update the name field in package.json to reflect your NPM package name in your private or public NPM registry. Then run:

npm publish

The "prepublishOnly": "npm run build" script in package.json will execute before publish occurs, ensuring the build/ directory and the compiled component library exist.

Usage

Let's say you created a public NPM package called react-component-library with the TestComponent component created in this repository.

Stylesheet

First, you'll need to import the index.css CSS file distributed by the package. This should be done at the root of your project (in index.js or App.tsx of your React app) and will look like:

import 'react-component-library/build/index.css';

...

Components

Usage of components (after the library installed as a dependency into another project) will look like:

import React from "react";
import { TestComponent } from "react-component-library";

const App = () => (
  <div className="app-container">
    <h1>Hello I'm consuming the component library</h1>
    <TestComponent heading={'Some heading'} content={<div>Some content</div>} />
  </div>
);

export default App;

Using Component Library SCSS Variables

To use our design system scss variables in any scss module, import @import '@tirerack/design-tokens-common/dist/scss/_Wheelrack-variables';

.example-container {
    color: $color-neutral-500;

}

Additional Help

Supporting Image Imports

Add the following library to your component library @rollup/plugin-image:

npm i -D @rollup/plugin-image

Then add it to rollup-config.js:

...
plugins:[
  ...,
  image(),
  ...
]
...

You can then import and render images in your components like:

import logo from './rollup.png';

export const ImageComponent = () => (
  <div>
    <img src={logo} />
  </div>
);