For years now, though, I’ve been using Tachometer for most browser-based benchmarks. It’s featured in this blog a few times, although I’ve never written specifically about it. Tachometer doesn’t make benchmarking totally foolproof, but it does automate a lot of the trickiest bits. What I like best is that it:

Visual testing is essential in web app development, ensuring your users never face a broken UI. Learn everything you’ll need in this comprehensive guide.

Minimalistic zero dependency Jest-like test library to run tests in browser, nodejs or deno

Playwright is a Node.js library for cross-browser end-to-end testing across Chromium, Firefox, and WebKit.

PhantomJS is a headless WebKit with JavaScript API. It has fast and native support for various web standards: DOM handling, CSS selector, JSON, Canvas, and SVG.

Jasmine is a behavior-driven development framework for testing JavaScript code.