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26 lines
1.5 KiB
Markdown
26 lines
1.5 KiB
Markdown
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# 2. Use CSS custom properties in Vector
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Date: 2023-10-23
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## Status
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Accepted.
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## Context
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In the context of the [Accessibility for Reading project](https://www.mediawiki.org/wiki/Reading/Web/Accessibility_for_reading) we needed a way to enable font-size customization in Vector in a scalable way. CSS custom properties were the mechanism chosen to enable this functionality. Full discussion available on [T346072](https://phabricator.wikimedia.org/T346072).
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## Decision
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CSS Custom properties will be implemented in Vector on a very tightly scoped basis. The implementation assumes that we will eventually want to up-stream CSS custom properties to MediaWiki core/Codex.
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In order to facility an eventual migration, the following implementation measures will be taken:
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- CSS custom properties will be used *only* when needed for client-size customization.
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- CSS custom properties will be grouped in the following file
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`resources/skins.vector.styles/CSSCustomProperties.less`.
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- CSS custom properties will maintain consistency with the naming convention of Codex design tokens.
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- When possible, we'll assign CSS custom properties to existing Codex token values.
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## Consequences
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CSS Custom properties will be marked as `@private` and `@experimental` in the spirit of the [Stable interface policy/Frontend](https://www.mediawiki.org/wiki/Stable_interface_policy/Frontend) in order to discourage usage outside of Vector. This could be changes to `@internal` if usage outside of Vector is deemed necessary.
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