/wp-includes/build/scripts/core-actions/page/set-as-homepage/

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	action.php      [source] [15 lines]	The "Set as homepage…" action, for pages: it applies to the pages with the `action-set-homepage` REST link, the published pages that are neither the homepage nor the posts page. Its JavaScript parts (`isEligible` and `RenderModal`) are in `action.tsx`, next to this file.