feat: client-side export — toSvgString / toPng / downloadChart / copyToClipboard (#123)#131
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…ToClipboard (#123) Browser-side rasterisation and download helpers, plus an `svgRef` prop on `<Surface>` so consumers can grab the inner `<svg>` cleanly. - new src/render/clientExport.ts: toSvgString, toPng, downloadChart, copyToClipboard, chartSvgFrom (container helper), svgPixelSize - Surface accepts `svgRef?: Ref<SVGSVGElement>` and threads it to the inner <svg> - exported from goldenchart main entry; no new deps; tree-shakeable - no font embedding (matches what the user sees; for fully standalone SVGs use goldenchart/server's renderToSVGString) - pure helpers unit-tested (project convention: no jsdom — see InteractiveChart.test.ts) Bundle 50 KB gzipped (budget 75 KB). All 412 existing tests pass plus 10 new.
This was referenced May 28, 2026
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Summary
src/render/clientExport.tswith browser-side helpers:toSvgString,toPng,downloadChart,copyToClipboard, pluschartSvgFrom(find the inner<svg>from a container ref) andsvgPixelSize/extensionFor/mimeForutilities.<Surface>accepts ansvgRef?: Ref<SVGSVGElement>prop and threads it to the inner<svg>— gives consumers a clean handle without restructuring chart APIs.goldenchartentry. Tree-shakeable: no canvas/clipboard work unless the relevant helper is imported.goldenchart/serverrenderToSVGStringpath embeds@font-face.src/interactive/InteractiveChart.test.ts). The DOM-dependent paths (toPng,downloadChart,copyToClipboard) are integration-only.Verification
npm run typecheckcleannpm test— 412 existing tests pass + 10 newnpm run build && npm run check:bundle— browser entry 50 KB gzipped (budget 75 KB, up 2 KB from clientExport)Test plan
Closes #123.