BootSwatcher

Bootswatch theme switcher Web Component with

• dark mode
• compact/invisible options
• Vite dev environment
• Offline-ready

Features

• ✅ Runtime theme switching among all Bootswatch v5 themes plus default Bootstrap
• ✅ Dark mode toggle via Bootstrap 5.3 data-bs-theme
• ✅ Configurable via element attributes (paths, defaults, visibility)
• ✅ Persistence via localStorage (bootswatcher:theme & bootswatcher:mode)
• ✅ Preload script applies saved theme & mode early to prevent FOUC
• ✅ Automatic link insertion if missing (insert-link attribute)
• ✅ Local copies of Bootswatch CSS and Bootstrap assets (JS & CSS)
• ✅ TypeScript source → ESM & IIFE bundles + types
• ✅ Node.js build script (build.js)
• ✅ Optional setup-webpack.js to scaffold a minimal webpack config
• ✅ Vite dev environment (vite.config.ts) with pnpm dev
• ✅ ESLint/Prettier setup for TypeScript & Web Components
• ✅ GitHub Action to build and publish dist/ (GitHub Pages)

Quick start

pnpm install
pnpm dev          # Vite dev server at http://localhost:5173
pnpm run build    # Production build (offline dist/)
pnpm dlx serve dist

Usage (component)

simple

<boot-swatcher/>

advanced

<boot-swatcher
  themes-url="./themes/themes.json"
  themes-path="./themes"
  link-id="bootswatch-theme"
  default-theme="bootstrap"
  default-mode="auto"
  show-label
  show-mode-toggle
  compact
  insert-link
></boot-swatcher>

Attributes

• themes-url: URL to JSON array of theme names (auto-generated at build). Default: ./themes/themes.json
• themes-path: Directory containing CSS themes. Default: ./themes
• link-id: The <link> element id used for active theme. Default: bootswatch-theme
• default-theme: Fallback if no saved theme. Default: bootstrap
• default-mode: light | dark | auto (auto respects OS preference). Default: auto
• show-label: Present to show the "Theme" label
• show-mode-toggle: Present to show dark mode toggle
• compact: Present to render a smaller UI footprint
• invisible: Present to apply theme/mode without rendering controls
• insert-link: Present to create the <link id="..."> if it doesn't exist

Public Methods

• setTheme(name: string)
• setMode(mode: 'light' | 'dark')

Windows-friendly build script

• Detects available package manager (pnpm → npm → yarn) and uses the right commands.
• Uses node build.js

License

MIT