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JavaScript Heatmap Visualization

An interactive, dependency-free heatmap experiment built with the Canvas 2D API. It turns pointer and touch movement into a CPU-rendered color field in real time.

Open the live demo{: .btn .btn-primary }

Explore the interaction

Move your pointer across the visualization—or touch the screen on a compatible device—to add heat. Each animation frame cools the previous values, applies a blur, and maps intensity to a color gradient.

Built for the web platform

  • Plain JavaScript and Canvas 2D—no runtime dependencies or build step.
  • Responsive full-viewport canvas.
  • Pointer and touch support.

The source and local run instructions are available in the project README.