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

RegExr
rubular
RegEx Generator
RegexPlanet Ruby
The Regex Coach
RegexMagic
Reggy
The award-winning Expresso editor is equally suitable as a teaching tool for the beginning user of regular expressions or as a full-featured development environment for the experienced programmer with an extensive knowledge of regular expressions.
Which is more popular?
Based on our record, Eloquent JavaScript seems to be a lot more popular than Expresso. While we know about 218 links to Eloquent JavaScript, we've tracked only 2 mentions of Expresso.
Website, pricing, platforms and company facts side by side.
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| Website | eloquentjavascript.net | ultrapico.com |
| Pricing | — | |
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What each product offers, as listed by its team.

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

Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Eloquent JavaScript A Modern Introduction to Programming 3rd Edition by Marijn Haverbeke review
More videos
REVIEW DE MON EXPRESSO À 100 000 EUROS AVEC STROPOSAUCE
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Eloquent JavaScript and Expresso. 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
Working in PowerShell (.Net regex) one of my favorite tools is https://ultrapico.com/expresso.htm. It does require registering for a free license but it's well worth it. Source: over 4 years ago
Then you need this or something like it: https://ultrapico.com/expresso.htm. Source: over 4 years ago
When comparing Eloquent JavaScript and Expresso, you can also consider the following products.

Build and debug modern web and cloud applications, by Microsoft
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RegExr.com is an online tool to learn, build, and test Regular Expressions.
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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.
Compare GitHub to Eloquent JavaScript or Expresso:

RegEx Generator is a simple-to-use application that comes with the brilliance of intuitive regex and is also helping you out to test the regex.
Compare RegEx Generator to Eloquent JavaScript or Expresso: