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
4
Algorithms
112
Arrays
51
Artificial Intelligence
3
Bits
1
Cellular Automata
2
Cryptography
4
Data Science
2
Data Structures
5
Date Time
1
Debugging
1
Design Patterns
1
Dynamic Programming
1
Esoteric Languages
1
Fundamentals
58
Game Solvers
20
Games
407
Geometry
6
Graph Theory
2
Graphics
1
Lists
1
Logic
31
Machine Learning
3
Mathematics
26
Matrix
5
Metaprogramming
2
Neural Networks
1
Object-oriented Programming
12
Parsing
4
Performance
9
Permutations
3
Physics
1
Puzzles
279
Refactoring
3
Regular Expressions
11
Restricted
31
Reverse Engineering
3
Riddles
2
Security
3
Simulation
1
Sorting
6
Strings
21
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
407 Kata Found
7 kyu
Coding 3min: Bug in Apple
2,853
myjinxin2015
Puzzles
Games
6 kyu
Fruit Machine
3,601
adrian.eyre
1 Issue Reported
Arrays
Games
Fundamentals
5 kyu
Four Letter Words ~ Mutations
689
rowcased
Strings
Arrays
Games
Parsing
Algorithms
2 kyu
Chess - checkmate with rook in 16 moves
46
user6793616
2 Issues Reported
Games
Performance
Algorithms
7 kyu
Coding 3min : A*B=C
1,369
myjinxin2015
1 Issue Reported
Puzzles
Games
5 kyu
Simple Time Bomb
2,451
constablebrew
1 Issue Reported
Reverse Engineering
Games
Puzzles
7 kyu
Thinking & Testing : Retention and discard
790
myjinxin2015
1 Issue Reported
Puzzles
Games
6 kyu
Pokemon Damage Calculator
4,428
yaphi1
Arrays
Games
Strings
Puzzles
7 kyu
Thinking & Testing : Math of Primary School
1,193
myjinxin2015
1 Issue Reported
Puzzles
Games
7 kyu
Two fighters, one winner.
28,862
Scopula
5 Issues Reported
Games
Algorithms
Logic
Fundamentals
6 kyu
Generate All Chess960 Positions
99
brodiemark
Games
Strings
Sorting
5 kyu
Four Letter Words ~ Anagrams
91
rowcased
Algorithms
Games
Game Solvers
Lists
Strings
Parsing
Fundamentals
5 kyu
Cryptic Cave: Episode 1
144
Unihedron
Reverse Engineering
Games
Esoteric Languages
Puzzles
8 kyu
They say that only the name is long enough to attract attention. They also said that only a simple Kata will have someone to solve it. This is a sadly story #1: Are they opposite?
12,859
myjinxin2015
1 Issue Reported
Puzzles
Games
6 kyu
Dreidel dreidel
890
steinbachr
Games
Algorithms
7 kyu
Decoding a message
3,127
samhstn
Puzzles
Algorithms
Cryptography
Security
Games
7 kyu
One line task: Square a number Without *, + or Math.pow()
371
Firefly2002
Refactoring
Mathematics
Games
Restricted
Puzzles
7 kyu
Talisman Board Game Combat System Checker
463
Mackay
1 Issue Reported
Games
Algorithms
7 kyu
Tetris Series #1 — Scoring System
1,949
Etoneja
1 Issue Reported
Fundamentals
Games
Algorithms
Arrays
6 kyu
Missing Alphabet
1,331
MicheleCarbone
1 Issue Reported
Strings
Algorithms
Games
5 kyu
Snakes and Ladders
7,476
adrian.eyre
Design Patterns
Games
Fundamentals
5 kyu
Hungry Hippos
548
adrian.eyre
3 Issues Reported
Games
Arrays
Fundamentals
5 kyu
Car Park Escape
1,724
adrian.eyre
Arrays
Games
Fundamentals
6 kyu
T.T.T.22: Left? Right? Both?
276
myjinxin2015
1 Issue Reported
Puzzles
Games
2 kyu
ASCII Games: Dance Dance Evolution I
212
Voile
Puzzles
Games
5 kyu
T.T.T.33: Grandfather clock
65
myjinxin2015
Games
Algorithms
5 kyu
Graphics Series #1: barcode EAN-13 part1
78
myjinxin2015
Puzzles
Games
5 kyu
Thinking & Testing : Wind whispers
75
myjinxin2015
Puzzles
Games
6 kyu
T.T.T.#4: Key of door
553
myjinxin2015
Puzzles
Games
5 kyu
■□ Pattern □■ : Double-Spiral
58
myjinxin2015
Games
ASCII Art
Puzzles
Loading...
Confirm
Collect:
undefined
Loading collection data...