HMPL.js

HMPL.js is a lightweight, server-oriented template language for JavaScript designed to make dynamic HTML rendering straightforward and secure. It focuses on fetching HTML from the server, safely interpolating data, and updating the DOM without requiring a heavy client-side framework. The primary purpose of HMPL.js is to keep web applications modern and interactive while maintaining a small client footprint and clear separation of concerns between server logic and UI rendering.

The library provides a concise templating syntax that integrates naturally with existing JavaScript code and server routes. It emphasizes safe rendering by default, helping prevent common injection vulnerabilities when inserting server-generated HTML into the browser. HMPL.js supports partial page updates, event-driven interactions, and progressive enhancement patterns, enabling developers to add interactivity without rewriting entire pages as single-page applications. Compared to tools like HTMX and Alpine.js, it offers a more template-centric, server-first approach that remains easy to reason about and maintain.