A Case for poster on Canvas
Read OriginalThis technical article argues that the HTML <canvas> element lacks a declarative way to show a static visual representation, unlike the <video> element's 'poster' attribute. This causes problems for web archiving, user experience (blank screens during load), and Core Web Vitals. The author proposes adding a 'poster' attribute to <canvas> to display a placeholder image before JavaScript draws, which would also be captured when pages are saved, preserving content for archives and improving perceived performance.
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