Forma 36 React Components

A React component library for the Forma 36 design system created by Contentful.

Table of contents

• Forma 36 React Components
  • Table of contents
  • Installing package
  • Usage
    • Import desired component into your project
  • Development
    • Storybook
    • Example component directory structure
    • Code Style Guide
    • Component principles
    • Adding documentation for component
  • Testing
    • Run tests
  • Building
    • Create a build of the library
  • Commits

Installing package

yarn add @contentful/f36-components

Or

npm install @contentful/f36-components

Usage

Import desired component into your project

import { Button } from '@contentful/f36-components';

Development

For local development, in the root of the repo run npm i to install all dependencies and then npm run-script build to build all packages. This package depends on several other Forma 36 packages so you will need to build all of them.

Storybook

We use Storybook to create a development environment for our component library. To start it locally run:

npm run-script storybook

When creating new component, before you start, please have a look at our contribution model for Forma 36.

Example component directory structure

A component's directory should resemble the following:

/my-component
  /examples
  /src
    index.ts // A file for exporting your component
    MyComponent.tsx  // Your React component
    MyComponent.test.tsx // Component tests
    MyComponent.styles.ts // Component styles
  /stories
    # stories for storybook of each component inside the package
  README.mdx
  package.json

For more detailes you can have a look in document that describes folder structure in details.

If you use npm run-script generate in the root of the repo, this structure will be created automatically for you

Code Style Guide

Our code style guide

Component principles

We follow a number of principles when creating our components:

1. A component is responsible for only its internal spacing

Component should only be responsible for its own internal spacing - never external spacing. This means that we're flexible in where our components can be used without having to override margins. The only outlier from this rule are typography components - they can manage their own margins. To handle margins and layout you can use our core components, like:

• Box
• Flex
• Grid
• Stack

Adding documentation for component

We would like to make sure that every component contains a README file with recommendations and guidelines. Make sure that your documentation for the component contains following parts:

1. A short summary of the component.
2. Import - provide example how to import component.
3. Examples - try to add couple of examples, both basic and more advanced, where component is used in the context with other components.
4. Props (API reference) - Overview of properties
5. Content guideliness - try to describe in best practices around content for your component
6. Accessibility - If possible, we strongly recommend providing accessibility guidelines.

Testing

We are using Jest and Testing Library to test our components.

Tests are kept next to their components and use the .test.js file extension.

Run tests

npm run-script test

It is recommended to run tests in development with the optional --watch flag.

npm run-script test --watch

Building

We are using tsup and esbuild together with Microbundle to build our component library.

Each component builds to its own dist directory with:

• index.d.ts – TypeScript type declaration file
• index.js – CJS (CommonJS)
• index.modern.mjs – Modern output (work in all modern browsers)
• index.module.js – legacy ESM (ES Modules) output (for bundlers)
• index.umd.js – legacy UMD (Universal Module Definition) output (for Node & CDN use)

Create a build of the library

npm run-script build

Commits

This project uses the Angular JS Commit Message Conventions, via semantic-release. See the semantic-release Default Commit Message Format section for more details.

You can commit the changes by running

npm run-script commit