This line chart visualizes the GDP of four Southeast Asian countries—Vietnam, Thailand, Indonesia, and Malaysia—from 2012 to 2022, using a qualitative color scale with distinct hues for each nation. The chart employs D3.js v7 to create SVG paths for each country’s trend line, with an ordinal color scale mapping countries to specific colors. A legend generated via d3-legend and an ordinal color scale is displayed horizontally. The data is loaded from a CSV file and parsed, with axes rendered using d3.axisBottom and d3.axisLeft.