Tagged accessibility

• July 31, 202610 min

  Rendering Observable Plot charts inside a Cloudflare Worker

  How to render Observable Plot charts inside a Cloudflare Worker: the linkedom shim that works, the domino and Vega failures that don't, byte-identical output across Node and workerd, and accessible charts enforced by the build.

  accessibilitycloudflaredata-visualizationobservable-plotworkers

• July 28, 202611 min

  Designing a color palette the build can check

  A method for accessible color palette design: the WCAG contrast ratio function in Python, OKLCH candidate selection, color vision deficiency simulation with the Vienot matrices, chart lightness ladders, and a build gate that recomputes every pair on every deploy.

  accessibilitycolordesignwcag

• July 28, 202611 min

  A blog reading experience that works without JavaScript

  How to build a full reading experience, table of contents, progress bar, copy buttons, footnote previews, lightbox, that works with JavaScript disabled and enhances in under 2 kB gzipped. Includes the fallback inventory method and two-writer pipeline rules.

  accessibilitycloudflareperformanceprogressive-enhancement

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