DSA Algorithm Visualizer
Interactive step-by-step visualizations of sorting, graph, and tree algorithms
Overview
An interactive web application that animates 20+ data structure and algorithm implementations step-by-step — sorting algorithms, graph traversals, tree operations, and dynamic programming — with speed controls and live pseudocode highlighting.
Problem
Most DSA learners struggle to build intuition for algorithms because static explanations and pseudocode don't convey the temporal sequence of operations. Visual step-by-step animation dramatically improves comprehension.
Solution
A React application where each algorithm runs as a generator function yielding visualization frames. The UI renders each frame with controlled animation speed, highlights the active pseudocode line, and labels data structure state at each step.
Architecture
- 1Algorithm implementations as JavaScript generator functions yielding state snapshots
- 2React state machine consuming generator frames at configurable playback speed
- 3Canvas-based rendering for graph and tree visualizations
- 4Framer Motion for array/bar animations in sorting algorithms
- 5Pseudocode panel with line highlighting synchronized to algorithm state
Technical Challenges
- Representing arbitrary algorithm state as a serializable snapshot for frame-by-frame playback.
- Laying out graph nodes automatically for visually clean BFS/DFS animations without overlapping edges.
Results
- 20+ algorithms visualized including QuickSort, MergeSort, Dijkstra, BFS, DFS, AVL rotations, and DP table fills.
- Open-sourced as a learning resource for DSA students.