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

Provide possible paths from A to B in a directed graph Open

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

trekhleb/javascript-algorithms#830 · 2 comments · Opened Jan 9, 2022
Implement new Data Structure: SkipList Open

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

trekhleb/javascript-algorithms#827 · 4 comments · 2 reactions · Opened Dec 30, 2021
The second explanation of the Caesar code is that I don't know how to do it Open

Difficulty 3/5 1-2 days Newbie friendliness 10/100

trekhleb/javascript-algorithms#803 · Opened Nov 30, 2021
Doing Interpolation with FFT in JavaScript efficiency for hard polynomials problems Open

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

trekhleb/javascript-algorithms#783 · Opened Oct 10, 2021
Error: node-canvas was built without JPEG support Open

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

trekhleb/javascript-algorithms#757 · 2 reactions · Opened Aug 28, 2021
Pancake sort Open

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

trekhleb/javascript-algorithms#748 · 3 comments · 1 reaction · Opened Aug 6, 2021
Use the playground in a browser Open

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

trekhleb/javascript-algorithms#728 · 6 reactions · Opened Jun 27, 2021
Comment - fast Walsh Hadamard transform Open

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

trekhleb/javascript-algorithms#727 · 1 reaction · Opened Jun 23, 2021
Bit Reversal missing? Open

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

trekhleb/javascript-algorithms#692 · 1 comment · 4 reactions · Opened Apr 17, 2021
Doing Interpolation with FFT in jscript efficiency for hard polynomials problems Open

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

trekhleb/javascript-algorithms#689 · Opened Apr 11, 2021
images are not visible in dark mode Open

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

trekhleb/javascript-algorithms#675 · 3 comments · 5 reactions · Opened Mar 30, 2021
error while condition in Simplified Chinese Code Open

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

trekhleb/javascript-algorithms#671 · 1 comment · Opened Mar 29, 2021
Future Browser-Based Web Demo for Algorithms? Open

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

trekhleb/javascript-algorithms#657 · Opened Mar 4, 2021
Hard to view some images or diagrams in GitHub's Dark Mode Open

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

trekhleb/javascript-algorithms#656 · 2 comments · Opened Feb 24, 2021
Maybe there are some redundent code in Doubly-Linked-List Open

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

trekhleb/javascript-algorithms#655 · 1 comment · Opened Feb 24, 2021
Wrong array representation in Heap README.md Open

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

trekhleb/javascript-algorithms#640 · 4 comments · 1 reaction · Opened Feb 13, 2021
Can we have a CONTRIBUTING GUIDELINES section in the readme of this repo? It would make it easier for the beginners to follow and contribute. Open

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

trekhleb/javascript-algorithms#619 · Opened Dec 31, 2020
Add Matrix Chain Multiplication in DP Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

trekhleb/javascript-algorithms#616 · 6 comments · Opened Dec 28, 2020
Error:RangeError: Maximum call stack size exceeded Open

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

trekhleb/javascript-algorithms#590 · 1 reaction · Opened Dec 15, 2020
Linked List: Define a Cycle Open

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

trekhleb/javascript-algorithms#583 · 1 comment · Opened Dec 2, 2020
Linear Search Fix Open

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

trekhleb/javascript-algorithms#568 · 10 comments · Opened Oct 17, 2020
Optimize insertion sort Open

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

trekhleb/javascript-algorithms#567 · 2 comments · Opened Oct 17, 2020
Add MiniMax Open

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

trekhleb/javascript-algorithms#566 · 6 comments · Opened Oct 17, 2020
Fix Typo in BFS Test Open

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

trekhleb/javascript-algorithms#564 · Opened Oct 17, 2020
How can I use this lib with npm or yarn? Open

Difficulty 3/5 1-2 days Newbie friendliness 24/100

trekhleb/javascript-algorithms#560 · 3 comments · 1 reaction · Opened Oct 7, 2020
Stable Matching Algorithm Open

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

trekhleb/javascript-algorithms#555 · 1 comment · Opened Oct 1, 2020
Add A star algorithm Open

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

trekhleb/javascript-algorithms#550 · Opened Oct 1, 2020
More detailed instructions on how to run the code for beginners Open

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

trekhleb/javascript-algorithms#546 · 1 comment · 1 reaction · Opened Sep 24, 2020
Code misbehavior(mild) : LinkedList.append(), according to code, should add to tail, but actually append to head Open

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

trekhleb/javascript-algorithms#544 · 1 comment · Opened Sep 22, 2020
Two way binding Open

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

trekhleb/javascript-algorithms#543 · 1 comment · Opened Sep 20, 2020
Inefficient Hash Table implementation Open

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

trekhleb/javascript-algorithms#529 · 7 comments · 3 reactions · Opened Aug 20, 2020
Creat A site web for both phone and pc Open

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

trekhleb/javascript-algorithms#527 · 2 comments · Opened Aug 11, 2020
Setting key-value pairing in a HashTable where that key is already present w/ a different value. Open

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

trekhleb/javascript-algorithms#521 · Opened Aug 1, 2020
Counting Sort optimization Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

trekhleb/javascript-algorithms#498 · 1 comment · Opened Jun 3, 2020
Feature Request: Introduce an algorithm visualizer Open

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

trekhleb/javascript-algorithms#491 · 2 reactions · Opened May 26, 2020
Sorting Visualization Open

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

trekhleb/javascript-algorithms#488 · 2 comments · 3 reactions · Opened May 14, 2020
AVL remove need recursive from removeNode Open

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

trekhleb/javascript-algorithms#485 · 1 reaction · Opened May 2, 2020
BinaryTreeNode replaceChild didn't set parent current Open

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

trekhleb/javascript-algorithms#484 · Opened May 2, 2020
Arabic Tranlsation Open

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

trekhleb/javascript-algorithms#477 · Opened Mar 31, 2020
should it be this right ? Open

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

trekhleb/javascript-algorithms#460 · 1 comment · Opened Feb 7, 2020
Trie.test.js contains wrong assertion Open

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

trekhleb/javascript-algorithms#436 · Opened Dec 14, 2019
BFS image has a generic tree in it, but the algorithm only works with a binary trees Open

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

trekhleb/javascript-algorithms#434 · 1 comment · Opened Dec 10, 2019
AVL Tree rotation method is very confusing Open

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

trekhleb/javascript-algorithms#427 · 3 reactions · Opened Nov 15, 2019
Add missing contents on README.ko-KR.md Open

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

trekhleb/javascript-algorithms#417 · Opened Oct 23, 2019
Add more cryptography Open

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

trekhleb/javascript-algorithms#406 · 4 comments · 1 reaction · Opened Oct 8, 2019
Counting sort stability Open

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

trekhleb/javascript-algorithms#394 · Opened Sep 25, 2019
Lack Boyer-Moore Open

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

trekhleb/javascript-algorithms#391 · 5 reactions · Opened Sep 16, 2019
Hamiltonian Path with a directed graph Open

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

trekhleb/javascript-algorithms#383 · Opened Aug 25, 2019
Redundant condition Open

Difficulty 1/5 Under an hour Newbie friendliness 35/100

trekhleb/javascript-algorithms#378 · 2 comments · Opened Aug 5, 2019
Logo Design Open

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

trekhleb/javascript-algorithms#374 · 5 reactions · Opened Jul 19, 2019

trekhleb/javascript-algorithms

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