Bar chart with D3.js
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This bar chart visualizes the popularity of programming languages from a 2019 Stack Overflow survey, showing each language's percentage value above its corresponding bar. Built with D3.js v5, the SVG chart uses `d3.scaleLinear` for the y-axis, `d3.scaleBand` for categorical x-axis placement, and `d3.axisLeft`/`d3.axisBottom` to render axes with gridlines. Interactive mouseenter and mouseleave events trigger `transition` animations that highlight a bar and display divergence percentages for all other languages relative to the selected one.
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