Kata Library: JavaScript Practice
Sign Up
Time to claim your honor
Training
Practice
Complete challenging
Kata
to earn honor and ranks. Re-train to hone technique
Freestyle Sparring
Take turns remixing and refactoring others code through
Kumite
Community
Leaderboards
Achieve honor and move up the global leaderboards
Chat
Join our
Discord
server and chat with your fellow code warriors
Discussions
View our
Github Discussions
board to discuss general Codewars topics
About
Docs
Learn about all of the different aspects of Codewars
Blog
Read the latest news from Codewars and the community
Log In
Sign Up
Library
Collections
Newest
Oldest
Popularity
Positive Feedback
Most Completed
Least Completed
Hardest
Easiest
Name
Relevance
Low Satisfaction
All
My Languages
Agda (Beta)
BF (Beta)
C
CFML (Beta)
Clojure
COBOL (Beta)
CoffeeScript
CommonLisp (Beta)
Coq
C++
Crystal
C#
D (Beta)
Dart
Elixir
Elm (Beta)
Erlang (Beta)
Factor (Beta)
Forth (Beta)
Fortran (Beta)
F#
Go
Groovy
Haskell
Haxe (Beta)
Idris (Beta)
Java
JavaScript
Julia (Beta)
Kotlin
λ Calculus (Beta)
Lean
Lua
NASM
Nim (Beta)
Objective-C (Beta)
OCaml (Beta)
Pascal (Beta)
Perl (Beta)
PHP
PowerShell (Beta)
Prolog (Beta)
PureScript (Beta)
Python
R (Beta)
Racket
Raku (Beta)
Reason (Beta)
RISC-V (Beta)
Ruby
Rust
Scala
Shell
Solidity (Beta)
SQL
Swift
TypeScript
VB (Beta)
Approved & Beta
Approved
Beta
All
Kata I have not trained on
Kata I have not completed
Kata I have completed
8 kyu
easiest
7 kyu
6 kyu
5 kyu
4 kyu
3 kyu
2 kyu
1 kyu
hardest
Algorithms
17
Arrays
1
Binary
1
Ciphers
17
Cryptography
5
Fundamentals
1
Object-oriented Programming
7
Puzzles
1
Regular Expressions
2
Security
9
Strings
17
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
17 Kata Found
4 kyu
Vigenère Cipher Helper
8,915
jacobb
4 Issues Reported
Algorithms
Ciphers
Security
Object-oriented Programming
Strings
5 kyu
Caesar Cipher Helper
5,206
eugene-bulkin
4 Issues Reported
Ciphers
Object-oriented Programming
Strings
Algorithms
5 kyu
Tongues
2,067
Frzy
Strings
Ciphers
Algorithms
5 kyu
ROT13
28,867
hvaara
Strings
Ciphers
Regular Expressions
Algorithms
6 kyu
Condi cipher
355
dcieslak
Ciphers
Strings
Algorithms
3 kyu
Rail Fence Cipher: Encoding and Decoding
9,124
darrentburgess
3 Issues Reported
Algorithms
Ciphers
Cryptography
Strings
Security
6 kyu
Encrypt this!
23,656
suic
Fundamentals
Strings
Regular Expressions
Arrays
Ciphers
Algorithms
Cryptography
Security
5 kyu
Iterative Rotation Cipher
845
docgunthrop
2 Issues Reported
Strings
Ciphers
Algorithms
5 kyu
Interlaced Spiral Cipher
396
docgunthrop
1 Issue Reported
Ciphers
Strings
Algorithms
Beta
Bob's Secret Cipher
13
B1ts
Status:
Testing & feedback needed
Estimated Rank:
6 kyu
Ciphers
Algorithms
Cryptography
Security
Strings
Puzzles
7 kyu
Bitty Words
210
Austin Haws
1 Issue Reported
Strings
Binary
Algorithms
Ciphers
Cryptography
7 kyu
Cipher
603
bubmet
Algorithms
Ciphers
Cryptography
Strings
6 kyu
Simple Substitution Cipher Helper
3,693
jacobb
Ciphers
Security
Object-oriented Programming
Strings
Algorithms
6 kyu
Atbash Cipher Helper
650
jacobb
3 Issues Reported
Algorithms
Ciphers
Security
Object-oriented Programming
Strings
6 kyu
Kama Sutra Cipher Helper
275
jacobb
Ciphers
Security
Object-oriented Programming
Strings
Algorithms
5 kyu
Affine Cipher Helper
98
jacobb
1 Issue Reported
Algorithms
Ciphers
Security
Object-oriented Programming
Strings
5 kyu
Vigenère Autokey Cipher Helper
1,233
jacobb
Algorithms
Ciphers
Security
Object-oriented Programming
Strings
Confirm
Collect:
undefined
Loading collection data...