This pie chart visualizes the market share of popular JavaScript frameworks, including Vue, ReactJS, and Angular, based on values loaded from a CSV file. The chart displays each framework’s percentage via colored arcs and includes a legend with labels and values. Built with D3 v5 and React, it uses `d3.pie()` to compute arc angles, `d3.arc()` to draw SVG paths, and `scaleOrdinal` for color mapping, rendering the result as an SVG graphic.