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Previous behavior: $Show component only works with enabled feature flags: if feature flag is on, content is shown New behavior: $Show component also works with negated feature flags: if feature flag is off, content is shown Required for enabling custom content in forked builds
Directives
Directives are a custom feature of the Supabase docs content system, which allows you to extend MDX to provide custom functionality.
Why not a React component?
MDX supports React components, and that is the preferred way to add new features. If your use case is supported by a React component alone, use that instead.
Custom directives are used to implement features that need low-level parse or compile-time control over the MDX AST.
Syntax
We reserve a special syntax for directives, which start with a $ sign. For example:
<$CodeSample />
This syntax was chosen because it is both:
- Sufficiently standard to be supported by MDX parsers without needing to build a custom extension.
- Sufficiently uncommon to avoid collisions with other React components used in docs.