Render a bar chart

1import { mkdir, writeFile } from 'node:fs/promises';2import { join } from 'node:path';3import { ApexPainter } from 'apexify.js';4 5const outputDir = process.env.APEXIFY_EXAMPLE_OUTPUT_DIR;6if (!outputDir) throw new Error('APEXIFY_EXAMPLE_OUTPUT_DIR is required.');7 8const painter = new ApexPainter({ type: 'buffer' });9const data = [10  { label: 'Docs', value: 72, xStart: 0, xEnd: 1, color: '#6366f1' },11  { label: 'API', value: 58, xStart: 1, xEnd: 2, color: '#8b5cf6' },12  { label: 'Gallery', value: 50, xStart: 2, xEnd: 3, color: '#ec4899' },13];14const png = await painter.createChart('bar', data, { dimensions: { width: 480, height: 320 } });15if (!Buffer.isBuffer(png)) throw new Error('Expected createChart() to return a PNG Buffer.');16 17await mkdir(outputDir, { recursive: true });18await writeFile(join(outputDir, 'chart-bar.png'), png);19console.log(JSON.stringify({ example: 'node.chart.bar', format: 'png', width: 480, height: 320, bytes: png.length }));