JavaScript Event Loop Visualizer

What it does

Stop guessing how async JavaScript works. Watch the Event Loop execute your code step-by-step with live visualization of Call Stack, Web APIs, Task Queue & Microtask Queue. Test 12+ real-world patterns or write your own. Free forever.

Interactive JavaScript Event Loop Visualizer. Learn how the Call Stack, Web APIs, Microtask Queue, and Task Queue work together. Understand Promises, setTimeout, async/await with step-by-step animations.

• 
  JS VisualizerMay 2026 · jsvisualizer.bytefront.dev · ▲4

  Finally understand the JS event loop

• 
  JS Brain Teasers2025 · jsbrainteasers.com · ▲8

  Learn the javascript event loop in a new and fun way

• 
  Advanced JavaScript Visualized2021 · amazon.com · ▲4

  A book for mastering advanced javascript by visualization

• IA
  Instrumenting and visualizing JavaScript with d3.js2012 · latentflip.github.com · ▲105
• 
  Browser JavaScript and Event Loop2020 · bonsaiilabs.com · ▲6

  Master how browser runs JavaScript under the hood.

• 
  Cross-browser asynchronous JS script loader w/callbacks2012 · github.com · ▲45

• 
  /dev/null▲486

  a social network for devs

  Dev tools · 3d ago · dev-null.sh

• 
  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 28d ago · github.com

• 
  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 26d ago · github.com

• 
  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 23d ago · openbot.run

• 
  Talanoa▲346

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 21d ago · talanoa.email

• 
  CoreSpeed▲332

  One MCP for everything your agents need: apps, memory, tools

  Dev tools · 28d ago · corespeed.io

• IN
  isometric.nyc – giant isometric pixel art map of NYC▲1,325

  Hey HN! I wanted to share something I built over the last few weeks: isometric.nyc is a massive isometric pixel art map of NYC, built with nano banana and coding agents. I didn't write a single line of code. Of course no-code doesn't mean no-engineering. This project took a lot more manual labor than I'd hoped! I wrote a deep dive on the workflow and some thoughts about the future of AI coding and creativity: http://cannoneyed.com/projects/isometric-nyc

  AI · Jan 2026 · cannoneyed.com

• 
  Cowork▲1,088

  Turn Claude into your digital coworker

  AI · Jan 2026 · claude.com

• 
  DataFast▲867

  Revenue-first analytics

  Growth · Jan 2026 · datafa.st

• 
  OpenClaw▲836

  The AI that actually does things

  AI · Jan 2026 · openclaw.ai

• 
  Kilo Code Reviewer▲799

  Automatic AI-powered code reviews the moment you open a PR

  Dev tools · Jan 2026 · kilo.ai

• 
  PostSyncer▲793

  AI Content Maker, for Social Media Publishing

  AI · Jan 2026 · postsyncer.com