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Widget: theme.tokens to set any color or size token, and the full token table in the docs

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@Sreehita-here 已經在處理了。

開始於 2026年10月30日。

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描述

hacktoberfest

F-05 task 10. theme has options for the accent, the text and background colors, the font and the radius (packages/widget/src/theme.ts:3-17). Everything else, such as the border color, the secondary text, the panel size or the launcher size, can only be changed from the page's CSS (the "CSS Override" section in website/src/content/docs/widget/theming.mdx:66). Sites that configure the widget from JavaScript, or with update(), can't reach them.

What to do

  • Add tokens?: WidgetTokens to ThemeConfig, where WidgetTokens is an object of token names without the --cc- prefix: { border: '#d0d4da', 'panel-width': '440px' }. The names are the ones defined in packages/widget/src/styles/launcher.css:8-28 (accent, accent-hover, on-accent, text, text-secondary, bg, bg-surface, bg-input, border, danger, shadow, font, radius, fab-size, panel-width, panel-height, focus-ring, and so on). Type it as a union, so a typo is a type error, and export the type.
  • In applyTheme() (theme.ts:21), set each one with host.style.setProperty('--cc-' + name, value), after the existing options, so tokens wins over accent or bgColor. Ignore names that aren't tokens, and empty values.
  • Tokens apply in every mode. Say so in the docs, and show the page CSS for one mode only (the host has data-cc-mode when mode is light or dark).
  • update({ theme: { tokens } }) should work like the other theme options (widget.ts:538-548).
  • The docs half: a table in theming.mdx listing every token, what it colors, and its light and dark defaults (from launcher.css). Add tokens to the ThemeConfig block there and in the widget README.

Size
theme.ts is in the loader, which is at 4.62 of 5 kB, so keep the code small: a loop over the object and a check of the name is enough.

Acceptance criteria

  • Unit tests: tokens are set on the host, tokens wins over accent and bgColor, unknown names and empty values are ignored, and update() changes them
  • A type test (*.test-d.ts) showing a misspelled token name is an error
  • The token table and the tokens option documented, with pnpm docs:check passing
  • A minor changeset for @chatcops/widget; pnpm test:coverage, pnpm lint, pnpm api (commit the snapshot change) and pnpm size pass

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TypeScript
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