
character.ai
Replika
Jasmine
Sinon.JS
Enzyme
JanitorAI
Ava
Chai is a BDD / TDD assertion library for node and the browser that can be delightfully paired with any javascript testing framework.
VS Code
CodePen
GitHub
Node.js
RegExr
JSFiddle
CodeSandbox
Free ebook for the JS Beginners

Which is more popular?
Based on our record, Eloquent JavaScript seems to be a lot more popular than Chai. While we know about 218 links to Eloquent JavaScript, we've tracked only 4 mentions of Chai.
Website, pricing, platforms and company facts side by side.
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EJS
Eloquent JavaScript
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| Website | chaijs.com | eloquentjavascript.net |
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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
Developers working with JavaScript or Node.js who require a versatile and easy-to-use assertion library. It's particularly beneficial for those utilizing frameworks like Mocha or Jasmine and those who appreciate a choice between BDD and TDD styles in their testing approach.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Chai Review - with Liz Boccolini
More videos
Eloquent JavaScript A Modern Introduction to Programming 3rd Edition by Marijn Haverbeke review
More videos
How often each product is chosen within a category, 0–100% relative to the other.

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

Mocha as the test runner, Chai as the assertion library, and the Hardhat Chai Matchers to extend Chai with contracts-related functionality. - Source: dev.to / about 4 years ago
Assertion library we used: Chai (comes with a lot of plugins worth exploring). - Source: dev.to / over 4 years ago
While this is fine and I could have perfectly moved all my tests to use said assertion style, I like the descriptive way Jest tests look like. As a quick way to maintain certain similarity I reached for ChaiJS, an assertion library that... - Source: dev.to / over 4 years ago
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
When comparing Chai and Eloquent JavaScript, you can also consider the following products.

Engage in open-ended conversations and collaborations with AI-based characters and create your own characters for yourself and others to enjoy. Character.ai is a social platform for creating and interacting with advanced AI chatbots.
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Build and debug modern web and cloud applications, by Microsoft
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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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