Yearn Design System
Overview
-
📚 Storybook for UI component development and auto-generated docs -
💅 Styled-components for component-scoped styling -
⚛️ React declarative component-centric UI
Maintaining the system
-
📦 NPM for packaging and distribution -
✅ Chromatic to prevent UI bugs in components (by Storybook maintainers) -
🚥 CircleCI Continuous integration
Develop
yarn installWork on components
yarn storybookGlobal Styles
Components within the design system assume that a set of global styles have been configured. Depending upon the needs of the application, this can be done several ways:
Option 1: Render the GlobalStyle component
Useful when you don't need any custom body styling in the application, typically this would be placed in a layout component that wraps all pages, or a top-level App component.
import { global } from '@storybook/design-system'
const { GlobalStyle } = global/* Render the global styles once per page */
<GlobalStyle />
Option 2: Use the bodyStyles to apply styling
Useful when you want build upon the shared global styling.
import { createGlobalStyle } from 'styled-components'
import { global } from '@storybook/design-system'
const { bodyStyles } = global
const CustomGlobalStyle = createGlobalStyle`
body {
${bodyStyles}
// Custom body styling for the app
}
`/* Render the global styles once per page */
<CustomGlobalStyle />Font Loading
Rather than @import fonts in the GlobalStyle component, the design system's font URL is exported with the intention of using it in a <link> tag as the href. Different frameworks and environments handle component re-renders in their own way (a re-render would cause the font to be re-fetched), so this approach allows the design system consumers to choose the font loading method that is most appropriate for their environment.
Option 1: Build the link tag manually
import { global } from '@storybook/design-system'
const fontLink = document.createElement('link')
fontLink.href = global.fontUrl
fontLink.rel = 'stylesheet'
document.head.appendChild(fontLink)Option 2: Render the link tag in a component
import React from 'react'
import { global } from '@storybook/design-system'
const Layout = ({ children }) => (
<html>
<head>
<link href={global.fontUrl} rel="stylesheet" />
</head>
<body>{children}</body>
</html>
)
export default LayoutDevelopment Scripts
yarn release
Bump the version
Push a release to GitHub and npm
Push a changelog to GitHub
Notes:
- Requires authentication with
npm adduser -
autois used to generate a changelog and push it to GitHub. In order for this to work correctly, an environment variable calledGH_TOKENis needed that references a GitHub personal access token with the appropriate permissions to update the repo.
License
MIT © shilman