chart watermark + one-click PNG copy/download button - #1434
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This was referenced Jul 25, 2026
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…rom dev (#1436) * feat: chart watermark + copy/download button (openchainbench.com attribution + PNG export) (#1434) Co-authored-by: Florent Tapponnier <contact@mobula.io> * fix pnpm-lock: sync html-to-image entries so CI frozen-lockfile install passes (#1435) Co-authored-by: Florent Tapponnier <contact@mobula.io> --------- Co-authored-by: Florent Tapponnier <contact@mobula.io>
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DefiLlama-style attribution + easy sharing on every chart.
Watermark
Subtle "openchainbench.com" bottom-right of the chart (opacity 0.28 → visible but never competes with data). Renders inside SVG for time-series (
<text>element) and as absolute-positioned HTML for the ranked bar chart. Survives Twitter/Slack recompression and can't be cropped out because it sits inside the chart bounds.Copy/download
Split button in the chart header (icon-only on mobile, "Copy" + download icon on desktop). Click = PNG-to-clipboard via
navigator.clipboard.write(ClipboardItem). Second half = PNG download. Retina 2x pixel ratio for legible zoomed screenshots. Fallbacks: Firefox / insecure contexts / older Safari → download flow, no error surfaced.Impl notes
chart-watermark.tsx(SVG + HTML variants) andchart-export-button.tsxhtml-to-image@1.11.13(12KB, handles SVG + HTML in one pass)openchainbench-<slug>-<range>.pngfor time-series,openchainbench-<slug>-ranking.pngfor ranked bar--color-paperbackground forced during capture so light-mode chat pastes don't get transparency artifactsTest plan
openchainbench-<slug>-<range>.png