pugjs/pug

Pug is a template engine for JavaScript, a tool that lets developers write web page structures in a shorter, cleaner shorthand syntax and then automatically convert that shorthand into the full HTML that browsers actually read. Instead of typing out opening and closing tags like standard HTML requires, Pug lets you write indented, tag-free code where the hierarchy of your page is shown through indentation, much like how Python uses whitespace rather than braces. The practical benefit is less repetition and fewer typos. A few lines of Pug expand into a much longer HTML file with all the proper tags, attributes, and nesting in place. Pug also supports logic, you can embed conditional statements ("if you are a logged-in user, show this; otherwise show that") and loops directly inside your templates, and it supports variables so you can inject data from your server into the page layout at render time. Pug runs on Node.js, which is the JavaScript runtime commonly used on web servers. You install it via npm (the standard JavaScript package manager), then call it from your server code to compile your Pug templates into HTML strings that get sent to the browser. It can also be compiled ahead of time into JavaScript files for use directly in browsers, though the README notes this is a large file and pre-compiling is recommended. It was previously known as "Jade" before a name change due to a trademark conflict; as of version 2, the package name is "pug." You'd use Pug when building a Node.js web application and wanting a cleaner, more maintainable way to write your HTML views rather than writing raw HTML files. The full README is longer than what was provided.