Bootstrap 6 with Parcel

Workflow

• Step 1: Set up npm and install dependencies
• Step 2: Create the project structure
• Step 3: Configure Parcel (HTML + npm script)
• Step 4: Import Bootstrap's CSS and JS
• Step 5: Verify

Step 1: Set up npm and install dependencies

1. Create the project and initialize npm:
   sh

   mkdir my-project && cd my-project
   npm init -y

2. Install Parcel:
   sh

   npm i --save-dev parcel

3. Install Bootstrap and its optional peer dependencies (omit

   @floating-ui/dom

   if not using menus/popovers/tooltips; omit

   vanilla-calendar-pro

   if not using the datepicker):
   sh

   npm i --save bootstrap@6.0.0-alpha.1 @floating-ui/dom vanilla-calendar-pro

.scss

npm i --save-dev @parcel/transformer-sass

Step 2: Create the project structure

mkdir {src,src/js,src/scss}
touch src/index.html src/js/main.js src/scss/styles.scss

my-project/
├── src/
│   ├── js/
│   │   └── main.js
│   ├── scss/
│   │   └── styles.scss
│   └── index.html
├── package-lock.json
└── package.json

Step 3: Configure Parcel

1. src/index.html

   — link the Sass and JS entry points directly (Parcel resolves and bundles them):
   html

   <!doctype html>
   <html lang="en">
     <head>
       <meta charset="utf-8">
       <meta name="viewport" content="width=device-width, initial-scale=1">
       <title>Bootstrap w/ Parcel</title>
       <link rel="stylesheet" href="scss/styles.scss">
       <script type="module" src="js/main.js"></script>
     </head>
     <body>
       <div class="container py-4 px-3 mx-auto">
         <h1>Hello, Bootstrap and Parcel!</h1>
         <button class="btn-solid theme-primary">Primary button</button>
       </div>
     </body>
   </html>

2. package.json

   — add the start script:
   json

   {
     "scripts": {
       "start": "parcel serve src/index.html --public-url / --dist-dir dist",
       "test": "echo \"Error: no test specified\" && exit 1"
     }
   }

3. Start Parcel:
   sh

   npm start

Step 4: Import Bootstrap's CSS and JS

1. src/scss/styles.scss

   — import the source Sass with

   @use

   (never

   @import

   ):
   scss

   // Import all of Bootstrap's CSS
   @use "bootstrap/scss/bootstrap";

   To customize, override Bootstrap's CSS token maps (

   $root-tokens

   ,

   $*-tokens

   ) — see Customize › Sass. Token names are written unprefixed in Sass; Bootstrap's dist/CDN CSS adds the

   --bs-

   prefix via PostCSS, so compiling the source yourself keeps them unprefixed.

2. src/js/main.js

   — import Bootstrap's JS. Floating UI and Vanilla Calendar Pro are imported automatically through Bootstrap:
   js

   // Import all of Bootstrap's JS
   import * as bootstrap from 'bootstrap'

   Import only the plugins you need to keep bundle sizes down:
   js

   import { Tooltip, Toast, Popover } from 'bootstrap'

Step 5: Verify

1. Run

   npm start

   and open the served URL — the

   .container

   and

   .btn-solid.theme-primary

   button should be styled.
2. Confirm Parcel installed the Sass transformer (no

   .scss

   build errors) and the console is free of module errors.
3. Trigger a JS component (tooltip/dialog) to confirm the JS bundle works.
4. Bootstrap 6 requires a browser that supports

   oklch()

   and

   color-mix()

   .