Bootstrap 6 with npm

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Workflow

• Step 1: Set up npm and install dependencies
• Step 2: Create the project structure
• Step 3: Configure npm scripts and config files
• Step 4: Import Bootstrap's Sass
• 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 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

3. Install the tools to compile and post-process CSS:
   sh

   npm i --save-dev autoprefixer postcss postcss-cli sass

4. Install local dev tooling (watch, run scripts, serve, lint):
   sh

   npm i --save-dev nodemon npm-run-all sirv-cli stylelint stylelint-config-twbs-bootstrap

Step 2: Create the project structure

mkdir {css,scss}
touch index.html scss/styles.scss postcss.config.js stylelint.config.mjs

my-project/
├── css/
├── scss/
│   └── styles.scss
├── stylelint.config.mjs
├── index.html
├── package-lock.json
├── package.json
└── postcss.config.js

Step 3: Configure npm scripts and config files

1. postcss.config.js

   — run Autoprefixer after Sass:
   js

   const autoprefixer = require('autoprefixer')
   
   module.exports = {
     plugins: [
       autoprefixer
     ]
   }

2. index.html

   — link the compiled CSS and load Bootstrap's pre-built JS bundle (no bundler here, so use

   dist

   ):
   html

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

3. package.json

   — add scripts. Note

   --load-path=node_modules

   so Sass resolves

   bootstrap

   :
   json

   {
     "scripts": {
       "css-compile": "sass --load-path=node_modules --style expanded --source-map --embed-sources scss:css",
       "css-prefix": "postcss --config postcss.config.js --replace \"css/*.css\" \"!css/*.min.css\"",
       "build": "npm-run-all --sequential css-compile css-prefix",
       "watch": "nodemon --watch scss/ --ext scss --exec \"npm run build\"",
       "serve": "sirv --port 8080 --dev .",
       "start": "npm-run-all build --parallel watch serve",
       "lint": "stylelint \"scss/**/*.scss\""
     }
   }

4. stylelint.config.mjs

   :
   js

   /** @type {import('stylelint').Config} */
   export default {
     extends: 'stylelint-config-twbs-bootstrap'
   }

5. Start the dev server:
   sh

   npm start

Step 4: Import Bootstrap's Sass

scss/styles.scss

@use

@import

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

with ()

@use "bootstrap/scss/bootstrap" with (
  $root-tokens: (
    --border-radius: .25rem,
    --spacer: 1.5rem,
  )
);

$root-tokens

$*-tokens

--border-radius

--spacer

--bs-

Step 5: Verify

1. Run

   npm start

   and open

   http://localhost:8080

   — the

   .container

   and

   .btn-solid.theme-primary

   button should be styled once the CSS compiles.
2. Confirm

   css/styles.css

   is generated and updates when you edit

   scss/styles.scss

   (watch is running).
3. Confirm no console errors from the JS bundle.
4. Run

   npm run lint

   to check Sass against Bootstrap's stylelint config.
5. Bootstrap 6 requires a browser that supports

   oklch()

   and

   color-mix()

   .