VS Code
CodePen
GitHub
Node.js
RegExr
JSFiddle
CodeSandbox
Free ebook for the JS Beginners

Keyboard Tester Pro
inputprobe Keyboard Tester
HardwareTestingPro
Keyboard Checker
Microphone Test Online
KeyboardTest
KeyboardTest.tech
Free browser-based hardware tests: keyboard tester with rollover and key-repeat checks, mouse tester, dead pixel test with stuck-pixel fixer, and touch screen test. No install, no login.

Which is more popular?
Based on our record, Eloquent JavaScript seems to be more popular. It has been mentioned 218 times since March 2021.
Website, pricing, platforms and company facts side by side.
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EJS
Eloquent JavaScript
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| Website | eloquentjavascript.net | devicecheckhq.com |
| Pricing | — | |
| Listed in |
What each product offers, as listed by its team.

Possible disadvantages
An editorial look at what each product does well and who it suits.

Overall verdict
Why this product is good
Recommended for
No analysis of DeviceCheck HQ yet.
Walkthroughs and reviews on video.
Eloquent JavaScript A Modern Introduction to Programming 3rd Edition by Marijn Haverbeke review
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Eloquent JavaScript and DeviceCheck HQ. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

If you haven’t read Eloquent JavaScript , go check it out. It’s one of my all-time favourite programming books — hands down. - Source: dev.to / about 1 year ago
Videos, blogs, text-based teachings, YouTube project-based learning, books, and the like are all examples of various methods and mediums of acquiring skills, especially in the software engineering industry. As I continue to navigate... - Source: dev.to / almost 2 years ago
Seconded. I won't recommend it and no one I know has recommended it for a decade. It's hard for someone who doesn't know JS to know which parts has changed and is no longer the way to do things. https://github.com/getify/You-Dont-Know-JS... - Source: Hacker News / about 2 years ago
Tracking DeviceCheck HQ since Sep 2026.
When comparing Eloquent JavaScript and DeviceCheck HQ, you can also consider the following products.

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A front end web development playground.
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Run a full keyboard test: press every key and watch it register on a live board, with press counts, rollover tracking and re-press timing. Nothing is uploaded.
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Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.
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Test your keyboard, mouse, monitor, microphone, camera, and gamepad instantly in your browser. 77+ free hardware diagnostic tools - no installs & no accounts.
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