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
3
Algebra
3
Algorithms
50
Arrays
12
Big Integers
1
Bits
1
Combinatorics
2
Data Structures
1
Discrete Mathematics
3
Dynamic Programming
8
Functional Programming
1
Fundamentals
17
Game Solvers
1
Games
9
Geometry
5
Lists
1
Logic
14
Mathematics
121
Matrix
4
Memoization
1
Number Theory
3
Parsing
1
Performance
8
Probability
5
Puzzles
121
Recursion
4
Refactoring
2
Restricted
10
Security
1
Sorting
3
Statistics
3
Strings
9
Tutorials
1
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
121 Kata Found
6 kyu
Bouncing Balls
95,513
g964
1 Issue Reported
Puzzles
Algorithms
Mathematics
6 kyu
Disgruntled Employee
1,283
user5854572
1 Issue Reported
Logic
Mathematics
Sorting
Arrays
Puzzles
6 kyu
Integers: Recreation Two
1,088
g964
2 Issues Reported
Fundamentals
Mathematics
Puzzles
5 kyu
Is my friend cheating?
18,466
g964
7 Issues Reported
Fundamentals
Mathematics
Puzzles
6 kyu
Get angle between hour and minute hands
236
Mishaboo
Fundamentals
Mathematics
Puzzles
6 kyu
How many permutations where indices change by at most 1
216
benjaminzwhite
Fundamentals
Algorithms
Puzzles
Mathematics
Discrete Mathematics
5 kyu
Divide and maximize
382
AveragePythonEnjoyer
1 Issue Reported
Puzzles
Lists
Arrays
Mathematics
7 kyu
One line task: Square a number Without *, + or Math.pow()
377
Firefly2002
Refactoring
Mathematics
Games
Restricted
Puzzles
7 kyu
Consecutive Digits To Form Sum
2,941
MrZizoScream
1 Issue Reported
Fundamentals
Mathematics
Puzzles
7 kyu
Perimeter sequence
14,366
@m1ll
Mathematics
Puzzles
7 kyu
Crouching Distribution, Hidden Constant
422
kingcobra
Statistics
Mathematics
Puzzles
6 kyu
Simple Fun #214: Pascal Matrix
127
myjinxin2015
Puzzles
Mathematics
Algorithms
Matrix
6 kyu
Simple Fun #345: The Original Numbers
71
myjinxin2015
1 Issue Reported
Puzzles
Games
Mathematics
7 kyu
nth Floyd line
1,130
kodejuice
Mathematics
Puzzles
Fundamentals
5 kyu
What doesn't belong to these?
269
user5036852
Mathematics
Arrays
Puzzles
Algorithms
6 kyu
One line task: Multiples of 3 and 5
173
Firefly2002
Mathematics
Games
Refactoring
Algorithms
Restricted
Puzzles
5 kyu
Find four numbers
180
myjinxin2015
2 Issues Reported
Mathematics
Puzzles
Algorithms
6 kyu
Corner circle
978
@m1ll
1 Issue Reported
Mathematics
Puzzles
4 kyu
NIM the game
935
xcthulhu
Mathematics
Games
Puzzles
6 kyu
Disguised sequences (II)
696
g964
1 Issue Reported
Puzzles
Discrete Mathematics
Mathematics
6 kyu
Progressive Spiral Number Branch
241
GiacomoSorbi
1 Issue Reported
Mathematics
Number Theory
Puzzles
8 kyu
Pole Vault Starting Marks
4,622
HerrWert
2 Issues Reported
Fundamentals
Mathematics
Puzzles
6 kyu
Magic Zeckendorf
228
IVBakker
2 Issues Reported
Mathematics
Puzzles
6 kyu
Triangle Waveform
96
njsfield
2 Issues Reported
Mathematics
Puzzles
5 kyu
Implement the (Unnormalized) Cardinal Sine
53
donaldsebleung
Mathematics
Puzzles
Tutorials
6 kyu
Spiral Column Addition
78
phildinius
1 Issue Reported
Mathematics
Algorithms
Puzzles
7 kyu
Steer the Ship
193
bisatya
Mathematics
Puzzles
6 kyu
How many double digits?
238
Nekose
1 Issue Reported
Mathematics
Algorithms
Puzzles
5 kyu
The Bee
277
EgorArh
Algorithms
Mathematics
Matrix
Puzzles
Performance
Dynamic Programming
5 kyu
Ratio of Bouncy Numbers
318
cave.on
Mathematics
Puzzles
Loading...
Confirm
Collect:
undefined
Loading collection data...