trekhleb/javascript-algorithms

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📝 Algorithms and data structures implemented in JavaScript with explanations and links to further readings

Stars: 197k
Forks: 31k
Open beginner issues: 0
Indexed issues: 134

Dominant language: JavaScript
License: MIT
Last GitHub push: Jul 26, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

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134 open issues indexed

BinarySearchTreeNode removing Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

trekhleb/javascript-algorithms#2102 · 1 comment · Opened Feb 8, 2026
zh-TW translations missing — should contributors help complete? Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

trekhleb/javascript-algorithms#2085 · 6 comments · 1 reaction · Opened Nov 8, 2025
LinkedList methods. Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

trekhleb/javascript-algorithms#2065 · 1 comment · Opened Aug 4, 2025
Incorrect Cycle Path Construction in detectUndirectedCycle Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

trekhleb/javascript-algorithms#2057 · 1 comment · Opened Jun 26, 2025
Potential Inefficiency and Missed Priority Updates in Dijkstra's Algorithm Implementation Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

trekhleb/javascript-algorithms#2056 · Opened Jun 26, 2025
Feature Request: Add TypeScript Type Definitions Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

trekhleb/javascript-algorithms#2048 · 2 comments · 2 reactions · Opened Apr 26, 2025
Optimize Caesar Cipher Implementation and Enhance Robustness Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

trekhleb/javascript-algorithms#2046 · 3 comments · Opened Mar 13, 2025
Inconsistent File Naming: CamelCase vs PascalCase Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

trekhleb/javascript-algorithms#2043 · 2 comments · Opened Feb 26, 2025
Is there a hungarian algorithm? It's good to have an implementaion of it in this project, imho Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

trekhleb/javascript-algorithms#1264 · Opened Oct 28, 2024
Proposal to Add Secure Hash Algorithm ( SHA-1 ) Hashing Algorithm Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

trekhleb/javascript-algorithms#1205 · 1 comment · 1 reaction · Opened Oct 21, 2024
Least Common Multiple for a array of elements. Open

Difficulty 2/5 1-3 hours Newbie friendliness 42/100

trekhleb/javascript-algorithms#1154 · 6 comments · Opened Jul 20, 2024
Is not arithmetic shift better in countSetBits.js? Open

Difficulty 2/5 1-3 hours Newbie friendliness 38/100

trekhleb/javascript-algorithms#1152 · Opened Jul 19, 2024
Adding Circular Linked List In Data Structure. Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

trekhleb/javascript-algorithms#1131 · 1 comment · 2 reactions · Opened May 12, 2024
is there support for support for `BigInt` Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

trekhleb/javascript-algorithms#1107 · 1 comment · Opened Feb 23, 2024
Why this pointing to global context is giving undefined, even when global variable is defined ? Open

Difficulty 2/5 1-3 hours Newbie friendliness 25/100

trekhleb/javascript-algorithms#1106 · 4 comments · 1 reaction · Opened Feb 22, 2024
Pendekatan "Brute Force" dan "Divide and Conquer" Open

Difficulty 3/5 1-2 days Newbie friendliness 18/100

trekhleb/javascript-algorithms#1103 · 1 comment · 1 reaction · Opened Feb 9, 2024
`replaceChild` method in BinaryTreeNode is not correct Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

trekhleb/javascript-algorithms#1102 · 1 comment · Opened Jan 31, 2024
Unhandled Edge Case in Binary Search Implementation Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

trekhleb/javascript-algorithms#1095 · 1 comment · Opened Dec 31, 2023
Traverse in Reverse is unnecessary complex Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

trekhleb/javascript-algorithms#1092 · 4 comments · Opened Dec 10, 2023
Would be great to see `discussions` tab brought to this repository Open

Difficulty 1/5 Under an hour Newbie friendliness 25/100

trekhleb/javascript-algorithms#1085 · 1 comment · Opened Nov 16, 2023
priorityQueue does not poll out as expected Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

trekhleb/javascript-algorithms#1070 · 4 comments · Opened Sep 6, 2023
Binary Search file, comment typo Open

Difficulty 1/5 Under an hour Newbie friendliness 45/100

trekhleb/javascript-algorithms#1064 · 3 comments · 1 reaction · Opened Aug 27, 2023
Add Animations to Algorithms Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

trekhleb/javascript-algorithms#1061 · 3 comments · 4 reactions · Opened Aug 24, 2023
NO code available for Longest Increasing Subsequence Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

trekhleb/javascript-algorithms#1048 · 6 comments · Opened Jun 28, 2023
Translation of documents to Urdu, Hindi & Roman-Urdu Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

trekhleb/javascript-algorithms#1046 · 2 comments · Opened Jun 26, 2023
Translation to Khmer Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

trekhleb/javascript-algorithms#1034 · 3 comments · 2 reactions · Opened May 1, 2023
Small code errors for the LinkedList and HashTable data structures Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

trekhleb/javascript-algorithms#1033 · 3 comments · Opened Apr 20, 2023
I don't see kadane's algorithm for maximum subarray sum Open

Difficulty 3/5 1-2 days Newbie friendliness 20/100

trekhleb/javascript-algorithms#1030 · 5 comments · Opened Apr 16, 2023
bug(linked-list): `insert` method duplicates value of head in tail Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

trekhleb/javascript-algorithms#1016 · 3 comments · Opened Apr 5, 2023
Factorial of a negative number does not exist Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

trekhleb/javascript-algorithms#1008 · 18 comments · Opened Mar 17, 2023
🐛 Needed code modification for insert method in LinkList code Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

trekhleb/javascript-algorithms#1004 · 1 comment · Opened Mar 4, 2023
The "i" of the for loop can be initialized with the value 2 Open

Difficulty 3/5 1-2 days Newbie friendliness 30/100

trekhleb/javascript-algorithms#990 · 10 comments · Opened Jan 31, 2023
Eu realmente não entendi Open

Difficulty 3/5 1-2 days Newbie friendliness 15/100

trekhleb/javascript-algorithms#960 · 7 comments · Opened Nov 17, 2022
code translation Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

trekhleb/javascript-algorithms#958 · 3 comments · Opened Nov 11, 2022
Eslint parsing error Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

trekhleb/javascript-algorithms#955 · 2 comments · Opened Oct 30, 2022
read-black-tree Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

trekhleb/javascript-algorithms#939 · 4 comments · Opened Sep 26, 2022
Add CombSort Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

trekhleb/javascript-algorithms#931 · 1 comment · Opened Aug 27, 2022
Set Euler diagrams Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

trekhleb/javascript-algorithms#911 · Opened Jul 9, 2022
Persian Language Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

trekhleb/javascript-algorithms#907 · Opened Jun 30, 2022
Does the eulerian-path find all possible cycles? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

trekhleb/javascript-algorithms#883 · Opened Apr 29, 2022
Quick sort in place reference link takes me to weird site Open

Difficulty 1/5 Under an hour Newbie friendliness 45/100

trekhleb/javascript-algorithms#881 · 2 comments · Opened Apr 24, 2022
[Typo] README.md Open

Difficulty 1/5 Under an hour Newbie friendliness 55/100

trekhleb/javascript-algorithms#880 · 5 comments · 4 reactions · Opened Apr 19, 2022
npm package(s) Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

trekhleb/javascript-algorithms#872 · 1 comment · Opened Mar 7, 2022
Your project has been added to a list of copyfree works. Open

Difficulty 2/5 1-3 hours Newbie friendliness 20/100

trekhleb/javascript-algorithms#868 · 1 comment · Opened Feb 25, 2022
Add Markov Chain or Markov Process algorithm Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

trekhleb/javascript-algorithms#867 · 1 comment · Opened Feb 25, 2022
pictures in algo and data structures not visible on the default github dark theme Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

trekhleb/javascript-algorithms#866 · 1 comment · 1 reaction · Opened Feb 22, 2022
npm该更新了它老了呀 Open

Difficulty 3/5 1-2 days Newbie friendliness 20/100

trekhleb/javascript-algorithms#858 · 2 comments · Opened Feb 9, 2022
Data structures Open

Difficulty 5/5 Over a week Newbie friendliness 10/100

trekhleb/javascript-algorithms#857 · 2 comments · 8 reactions · Opened Feb 7, 2022
Inserting, removing, accessing, modifying, by index, on linked list Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

trekhleb/javascript-algorithms#835 · 2 comments · Opened Jan 16, 2022
feat:linked list add new method Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

trekhleb/javascript-algorithms#832 · 5 reactions · Opened Jan 10, 2022

trekhleb/javascript-algorithms

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