esbuild demonstration

A demonstration CSS and JavaScript build system using esbuild and no other dependencies or plugins. It creates a basic web page with a real-time clock.

Code should run on Linux, Mac, and Windows WSL. Please use or adapt it as you wish.

Craig Buckler

Quickstart

Clone repository and install dependencies (esbuild only):

npm i

Run a development server:

npm start

Open localhost:8000 in a browser. Code is re-bundled when you update a CSS or JS file. CSS updates live-reload the stylesheet without a refresh.

Press Ctrl|Cmd + C to quit.

Create a minified production build for deployment:

npm run build

Overview

The real-time clock page is built to a build directory using source files from src using the esbuild configuration code in esbuild.config.js.

• src/html/index.html is copied as-is to build/index.html. It contains an inline script to handle live CSS reloads.

• all files in src/images/ are copied to build/images/. These files are referenced directly from HTML, CSS, or JavaScript.

• esbuild bundles the CSS file src/css/main.css to build/css/main.css. It imports all partials, expands nested syntax, and inlines SVGs.

• esbuild bundles the JS file src/js/main.js to build/js/main.js. It imports all modules and tree-shakes to remove unused functions.

Development builds generate CSS and JS source maps. Production builds remove logging and minify the code.