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bun-css-modules

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bun-css-modules

Import CSS Modules into Bun for server rendered html/components

1.0.10

latest

Source

npm

Version published: 2 months ago

Weekly downloads: 40

Maintainers: 0

Weekly downloads

Created: last year

Source

bun-css-modules

Allows you to import CSS Modules directly into Bun.

This loader uses the incredibly fast Rust based Lightning CSS under the hood.

Installation

To install dependencies:

bun add -D bun-css-modules

Create cssLoader.ts:

import { plugin } from 'bun'
import { moduleCssLoader } from 'bun-css-modules'

plugin(moduleCssLoader())

You can pass in options to customize some settings via moduleCssLoader({ [optionName]: <value> }). The defaults are:

{
  filePattern = /\.module.css$/,
  browserlistQuery = [
    'last 4 chrome version',
    'last 4 firefox version',
    'last 2 safari version',
  ],
}

Create a bunfig.toml if you don't have one and add:

preload = ["./cssLoader.ts"]

Example Usage

Example using Hono JSX:

/* Button.module.css */
.buttonBase {
  appearance: none;
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  border-radius: 4px;
}

.primary {
  composes: buttonBase;
  background: blue;
  color: white;
  border: 1px solid purple;
}

import styles from './Button.module.css'

export function PrimaryButton({ children }) {
  return <button class={styles.primary}>{children}</button>
}

Include styles once in your head via the special cssText property.

import buttonStyles from 'src/components/Button/Button.module.css'
import tableStyles from 'src/components/Table/Table.module.css'

export function Layout({ title, children }: LayoutProps) {
  return (
    <html>
      <head>
        <title>{title}</title>
        <style>{buttonStyles.cssText}</style>
        <style>{tableStyles.cssText}</style>
      </head>
      <body>{children}</body>
    </html>
  )
}

import { PrimaryButton } from 'src/components/Button'
import styles from './SignUpPage.module.css'

function SignUpPage() {
  return (
    <div class={styles.container}>
      <h1>Sign up</h1>
      <PrimaryButton>Sign up</PrimaryButton>
      {/* One-off page styling can just be included here */}
      <style>{styles.cssText}</style>
    </div>
  )
}

Typescript

Add an ambient file if you don't have one, e.g. app.d.ts:

declare module '*.module.css' {
  const styles: {
    cssText: string
    [className: string]: string
  }
  export default styles
}

And include it in your tsconfig.json:

{
  "compilerOptions": {
    "esModuleInterop": true,
    "strict": true,
    "baseUrl": ".",
    "types": ["bun-types", "./app.d.ts"]
  }
}

Keywords

Bun

CSS Modules

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Package last updated on 10 Feb 2025

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