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
ASCII Art
11
Algorithms
29
Arrays
12
Binary
1
Ciphers
1
Combinatorics
1
Cryptography
2
Data Structures
1
Debugging
1
Dynamic Programming
1
Fundamentals
15
Games
7
Geometry
2
Interpreters
1
Logic
7
Mathematics
9
Memoization
1
Number Theory
1
Parsing
2
Performance
4
Permutations
2
Puzzles
83
Recursion
1
Regular Expressions
7
Restricted
8
Security
2
Set Theory
1
Sorting
2
Strings
83
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
83 Kata Found
6 kyu
Pokemon Damage Calculator
4,457
yaphi1
Arrays
Games
Strings
Puzzles
6 kyu
Pirate treasure chest codes
341
roseinapuddle
1 Issue Reported
Strings
Regular Expressions
Puzzles
7 kyu
Mumbling
243,129
g964
Fundamentals
Strings
Puzzles
7 kyu
Green Glass Door
2,134
Redmega
Strings
Fundamentals
Puzzles
6 kyu
Mr. Wright & Mr. Wong
32
dfhwze
Puzzles
Strings
6 kyu
One down
1,210
WesleyYoung
1 Issue Reported
Strings
Algorithms
Cryptography
Puzzles
7 kyu
Return pyramids
1,392
josemanuel.rincon
Strings
Algorithms
ASCII Art
Puzzles
6 kyu
Count the number of kanas!
102
Sweeper
Strings
Puzzles
7 kyu
Monkey's MATH 01: How many "ZERO"s?
1,184
myjinxin2015
Strings
Regular Expressions
Puzzles
5 kyu
1's, 0's and wildcards
1,831
Tefferson
Combinatorics
Strings
Permutations
Puzzles
6 kyu
We are the Robots d[(0)(0)]b
319
user8476848
2 Issues Reported
Algorithms
Data Structures
Regular Expressions
Puzzles
Strings
6 kyu
Drunk friend
1,276
vasekhlav
Strings
Algorithms
Puzzles
6 kyu
The Bus Passenger Puzzle
20
dfhwze
Puzzles
ASCII Art
Strings
6 kyu
Custom Christmas Tree III: the center of leaves
103
myjinxin2015
Puzzles
Strings
Mathematics
Fundamentals
5 kyu
Ookkk, Ok, O? Ook, Ok, Ooo!
696
ZozoFouchtra
1 Issue Reported
Strings
Binary
Puzzles
6 kyu
Custom Christmas Tree
1,039
myjinxin2015
Strings
ASCII Art
Puzzles
7 kyu
Simple Fun #182: Happy "g"
1,663
myjinxin2015
Puzzles
Strings
Regular Expressions
7 kyu
Guess the Word: Count Matching Letters
1,594
GrahamD
Strings
Games
Puzzles
7 kyu
Crossed words
211
sgoi
Strings
Algorithms
Logic
Puzzles
2 kyu
Regular Expression - Check if divisible by 0b111 (7)
2,283
Hacker Sakana
Puzzles
Regular Expressions
Strings
Algorithms
7 kyu
Ce*s*r*d Strings
2,176
elmoiv
Puzzles
Strings
Fundamentals
6 kyu
Dead Ants
2,463
dinglemouse
Algorithms
Strings
Puzzles
7 kyu
Pandemia 🌡️
5,020
Jjason
1 Issue Reported
Strings
Puzzles
7 kyu
Complete The Pattern #1
10,611
DivyanshBatham
Strings
ASCII Art
Puzzles
Beta
Pyramid Secrets: The Atlantean Code
3
dfhwze
Status:
Testing & feedback needed
Estimated Rank:
4 kyu
Puzzles
ASCII Art
Strings
Algorithms
5 kyu
Pyramide d'Azkee
106
dfhwze
Algorithms
Puzzles
ASCII Art
Strings
Geometry
5 kyu
Cheyenne Wigwam
48
dfhwze
Algorithms
Puzzles
ASCII Art
Strings
8 kyu
Never visit a . . . !?
20,427
aryan-firouzian
1 Issue Reported
Puzzles
Strings
Number Theory
Mathematics
7 kyu
Where's Waldo?
590
dfhwze
Puzzles
Strings
Arrays
Logic
7 kyu
Trilingual democracy
2,209
jcsahnwaldt
Fundamentals
Puzzles
Strings
Loading...
Confirm
Collect:
undefined
Loading collection data...