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
5
Algebra
18
Algorithms
531
Arrays
44
Big Integers
5
Binary
3
Bits
4
Combinatorics
12
Cryptography
2
Data Science
4
Data Structures
68
Date Time
5
Discrete Mathematics
2
Dynamic Programming
14
Functional Programming
1
Fundamentals
138
Game Solvers
1
Games
16
Geometry
41
Graph Theory
4
Image Processing
1
Interpreters
1
Language Features
1
Linear Algebra
4
Lists
3
Logic
53
Machine Learning
2
Mathematics
531
Matrix
11
Memoization
10
Networks
1
Number Theory
14
Object-oriented Programming
4
Parsing
5
Performance
52
Permutations
10
Physics
1
Probability
3
Puzzles
50
Recursion
15
Refactoring
2
Regular Expressions
2
Restricted
7
Security
2
Simulation
1
Sorting
16
Statistics
7
Strings
40
Trees
3
Tutorials
2
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
531 Kata Found
5 kyu
Fibonacci Factory Function
1,198
x-way
Mathematics
Algorithms
5 kyu
Calculate Variance
2,780
eerwitt
3 Issues Reported
Statistics
Mathematics
Algorithms
7 kyu
Weight of its Contents
2,712
dnolan
2 Issues Reported
Algorithms
Mathematics
4 kyu
Explosive Sum
9,227
surtich
2 Issues Reported
Algorithms
Mathematics
Fundamentals
7 kyu
Finding Remainder Without Using '%' Operator
3,020
DivyanshBatham
2 Issues Reported
Mathematics
Restricted
Algorithms
8 kyu
Keep Hydrated!
236,358
paulrichard
1 Issue Reported
Algorithms
Mathematics
Fundamentals
3 kyu
Screen Locking Patterns
5,172
rsalgado
2 Issues Reported
Mathematics
Combinatorics
Geometry
Algorithms
Graph Theory
5 kyu
Reaching a number by x3 or +5 (or is it possible?)
116
WestwardLand968
Algorithms
Recursion
Mathematics
Logic
Performance
6 kyu
Financing Plan on Planet XY140Z-n
4,950
g964
3 Issues Reported
Mathematics
Algorithms
4 kyu
Adding Big Numbers
34,595
Becojo
4 Issues Reported
Mathematics
Big Integers
Algorithms
6 kyu
How many permutations where indices change by at most 1
215
benjaminzwhite
Fundamentals
Algorithms
Puzzles
Mathematics
Discrete Mathematics
6 kyu
Relational expressions
273
wthit56
Mathematics
Algorithms
6 kyu
How Many Numbers?
1,163
raulbc777
3 Issues Reported
Fundamentals
Algorithms
Mathematics
Data Structures
4 kyu
How many numbers III?
4,656
raulbc777
4 Issues Reported
Fundamentals
Data Structures
Algorithms
Mathematics
Logic
7 kyu
Triangular Treasure
29,418
JulianNicholls
2 Issues Reported
Algorithms
Mathematics
5 kyu
How Many Numbers? II
1,492
raulbc777
2 Issues Reported
Algorithms
Data Structures
Mathematics
Fundamentals
6 kyu
Beetle on a Rubber Band
36
dfhwze
Algorithms
Mathematics
6 kyu
Triangle number check
5,932
user8012989
1 Issue Reported
Mathematics
Algorithms
7 kyu
Powers of 3
4,033
kjytay
2 Issues Reported
Mathematics
Algorithms
7 kyu
Orthogonal Vectors
1,998
user3043623
4 Issues Reported
Physics
Mathematics
Algorithms
6 kyu
Build a pile of Cubes
90,059
g964
2 Issues Reported
Mathematics
Algorithms
6 kyu
Cut me in Pieces but in The Way I Like
197
raulbc777
Fundamentals
Algorithms
Mathematics
5 kyu
Catch the Bus - Continuous Edition
80
uttumuttu
Mathematics
Probability
Algorithms
4 kyu
Matrix Determinant
24,755
pjfranzini
8 Issues Reported
Matrix
Linear Algebra
Mathematics
Recursion
Algorithms
6 kyu
Multiples of 3 and 5 redux
2,063
yumaikas
Algorithms
Mathematics
5 kyu
Largest product in a series
4,037
JaniL
Mathematics
Algorithms
5 kyu
Mean Square Error
22,955
kylehill
Arrays
Mathematics
Algorithms
6 kyu
Mutual Recursion
8,806
dnolan
1 Issue Reported
Mathematics
Algorithms
Recursion
6 kyu
Last non-zero digit of factorial
490
mauro-1
Mathematics
Algorithms
6 kyu
Sum of Digits / Digital Root
292,171
user578387
3 Issues Reported
Mathematics
Algorithms
Loading...
Confirm
Collect:
undefined
Loading collection data...