feat(react-router): remove deprecated data in favor of loaderData

[MichaelDeBoey]

Follow-up of #14047

CC/ @rossipedia

[changeset-bot]

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Latest commit: fca625c

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[Copilot]

Pull request overview

This PR completes the migration started in #14047 by removing the deprecated data field from match/meta-related types and runtime objects, standardizing on loaderData across React Router’s match APIs.

Changes:

• Removed deprecated data from match/meta TypeScript types (MetaMatch, MetaArgs, Match, UIMatch).
• Updated runtime match conversion (convertRouteMatchToUiMatch) to no longer emit a data property.
• Updated unit and integration tests to assert against loaderData only.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
packages/react-router/lib/types/route-module-annotations.ts	Removes data from match/meta annotation types and updates type-level tests to index loaderData.
packages/react-router/lib/router/utils.ts	Removes deprecated UIMatch.data and stops emitting it in convertRouteMatchToUiMatch.
packages/react-router/lib/dom/ssr/routeModules.ts	Removes deprecated data from SSR meta types (MetaMatch, MetaArgs).
packages/react-router/lib/dom/ssr/components.tsx	Stops passing/setting data in SSR <Meta> wiring; uses loaderData only.
packages/react-router/tests/dom/data-static-router-test.tsx	Updates expected useMatches() shapes to exclude data.
packages/react-router/tests/data-memory-router-test.tsx	Updates useMatches() assertions to exclude data.
integration/matches-test.ts	Updates integration expectations to exclude data.
integration/catch-boundary-test.ts	Updates integration expectations to exclude data.

Comments suppressed due to low confidence (1)

packages/react-router/lib/dom/ssr/routeModules.ts:172

• The MetaFunction JSDoc example in this file still references the removed data argument and match.data property (e.g. ({ data, matches }) and matches.find(...).data). Since this PR removes data in favor of loaderData, those docs should be updated to prevent users from copying broken examples.

export interface MetaArgs<
  Loader extends LoaderFunction | ClientLoaderFunction | unknown = unknown,
  MatchLoaders extends Record<
    string,
    LoaderFunction | ClientLoaderFunction | unknown
  > = Record<string, unknown>,
> {
  loaderData:
    | (Loader extends LoaderFunction | ClientLoaderFunction
        ? SerializeFrom<Loader>
        : unknown)
    | undefined;
  params: Params;
  location: Location;
  matches: MetaMatches<MatchLoaders>;
  error?: unknown;

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