Baike.dev
All toolsOnline toolsAI codingTrendingOpen sourceNewsSubmit
Log in
< Back to tools
J

javascript-koans

> 编程语言
Open source

Koans to learn Javascript

2.4K stars0 likes1 views
WebsiteGitHub

About

Koans to learn Javascript

javascript-koans

Based on Edgecase's fantastic Ruby koans, the goal of the Javascript koans is to teach you Javascript programming through testing.

When you first run the koans, you'll be presented with a runtime error and a stack trace indicating where the error occurred. Your goal is to make the error go away. As you fix each error, you should learn something about the Javascript language and functional programming in general.

Your journey towards Javascript enlightenment starts in the koans/AboutExpects.js file. These koans will be very simple, so don't overthink them! As you progress through more koans, more and more Javascript syntax will be introduced which will allow you to solve more complicated problems and use more advanced techniques.

Running the Koans

Simply navigate to the Javascript Koans folder using a file browser, and double click on KoansRunnner.html.

Any browser will do, but for the best results Firefox or Chrome is recommended. More stack trace information shows up for javascript on these browsers.

The first error will be in koans/AboutExpects.js. Fix the first test and refresh the browser. Rinse and repeat until all tests turn green.

The test runner used is Jasmine with a customized report viewer.

Changelog

  • v3 - Nov 2010 - Moved out of branch of functional-koans project, into own top level project
  • v2 - Sept 2010 - Second version based on jasmine (Thanks Greg Malcolm!)
  • v1 - July 2010 - First version based on jsTestDriver

Acknowledgements

  • Dick Wall (the Java posse) - for bringing the idea of koans to my attention
  • Edgecase - for the great Ruby Koans
  • Douglas Crockford - for Javascript; the good bits

MIT Licensed

Issues· 0 open

View all issuesOpen on GitHub

No open issues yet, or sync has not completed.

> Tags

JavaScript

No comments yet. Be the first to share.

> Details

PublishedAug 1, 2026
UpdatedSep 17, 2026
Category编程语言
PricingOpen source

> Related tools

T
TypeScript
JavaScript 的超集,为前端与全栈提供静态类型
P
Python
通用编程语言,广泛用于 Web、数据与 AI
G
Go
Google 推出的简洁高效系统语言