I recently explored Svelteâs website and copied its two most illustrative examplesâupdating a numeric value with a button click and updating page text based on an input boxâand built a tiny signals library that handles both scenarios more cleanly than Svelte itself. The library, only a few lines of code (see `files/signals.js` and the demo in `files/example.html`), demonstrates how simple operators like `.map`, `.filter`, and `.combineLatest` can be composed from base âPulseâ or âSignalâ objects and built-in helpers such as `fromEvent`. By extending JavaScript with these signal primitives, I show that reactive programming is a natural extension of HTML/JS, enabling developers to learn the core vocabularyâcustom operators, subscriptions, and data flowâthrough straightforward examples.






















