heatmap.js

heatmap.js is a JavaScript library used to visualize data density or activity on a map or webpage. It creates colorful overlays where areas with higher activity or concentration are displayed with warmer colors (like red or orange), while less active areas are cooler colors (like blue). This helps users quickly identify patterns, hotspots, or areas of interest within a dataset. It’s useful in fields like marketing, urban planning, or website analytics to analyze and interpret spatial or user engagement data effectively.