@tanstack/react-router/dist/cjs/useRouterState.cjs.map

Modern and scalable routing for React applications

{"version":3,"file":"useRouterState.cjs","sources":["../../src/useRouterState.tsx"],"sourcesContent":["import { useStore } from '@tanstack/react-store'\nimport { useRef } from 'react'\nimport { replaceEqualDeep } from '@tanstack/router-core'\nimport { useRouter } from './useRouter'\nimport type {\n  AnyRouter,\n  RegisteredRouter,\n  RouterState,\n} from '@tanstack/router-core'\nimport type {\n  StructuralSharingOption,\n  ValidateSelected,\n} from './structuralSharing'\n\nexport type UseRouterStateOptions<\n  TRouter extends AnyRouter,\n  TSelected,\n  TStructuralSharing,\n> = {\n  router?: TRouter\n  select?: (\n    state: RouterState<TRouter['routeTree']>,\n  ) => ValidateSelected<TRouter, TSelected, TStructuralSharing>\n} & StructuralSharingOption<TRouter, TSelected, TStructuralSharing>\n\nexport type UseRouterStateResult<\n  TRouter extends AnyRouter,\n  TSelected,\n> = unknown extends TSelected ? RouterState<TRouter['routeTree']> : TSelected\n\n/**\n * Subscribe to the router's state store with optional selection and\n * structural sharing for render optimization.\n *\n * Options:\n * - `select`: Project the full router state to a derived slice\n * - `structuralSharing`: Replace-equal semantics for stable references\n * - `router`: Read state from a specific router instance instead of context\n *\n * @returns The selected router state (or the full state by default).\n * @link https://tanstack.com/router/latest/docs/framework/react/api/router/useRouterStateHook\n */\nexport function useRouterState<\n  TRouter extends AnyRouter = RegisteredRouter,\n  TSelected = unknown,\n  TStructuralSharing extends boolean = boolean,\n>(\n  opts?: UseRouterStateOptions<TRouter, TSelected, TStructuralSharing>,\n): UseRouterStateResult<TRouter, TSelected> {\n  const contextRouter = useRouter<TRouter>({\n    warn: opts?.router === undefined,\n  })\n  const router = opts?.router || contextRouter\n  const previousResult =\n    useRef<ValidateSelected<TRouter, TSelected, TStructuralSharing>>(undefined)\n\n  return useStore(router.__store, (state) => {\n    if (opts?.select) {\n      if (opts.structuralSharing ?? router.options.defaultStructuralSharing) {\n        const newSlice = replaceEqualDeep(\n          previousResult.current,\n          opts.select(state),\n        )\n        previousResult.current = newSlice\n        return newSlice\n      }\n      return opts.select(state)\n    }\n    return state\n  }) as UseRouterStateResult<TRouter, TSelected>\n}\n"],"names":["useRouter","useRef","useStore","replaceEqualDeep"],"mappings":";;;;;;AA0CO,SAAS,eAKd,MAC0C;AAC1C,QAAM,gBAAgBA,UAAAA,UAAmB;AAAA,IACvC,MAAM,MAAM,WAAW;AAAA,EAAA,CACxB;AACD,QAAM,SAAS,MAAM,UAAU;AAC/B,QAAM,iBACJC,MAAAA,OAAiE,MAAS;AAE5E,SAAOC,oBAAS,OAAO,SAAS,CAAC,UAAU;AACzC,QAAI,MAAM,QAAQ;AAChB,UAAI,KAAK,qBAAqB,OAAO,QAAQ,0BAA0B;AACrE,cAAM,WAAWC,WAAAA;AAAAA,UACf,eAAe;AAAA,UACf,KAAK,OAAO,KAAK;AAAA,QAAA;AAEnB,uBAAe,UAAU;AACzB,eAAO;AAAA,MACT;AACA,aAAO,KAAK,OAAO,KAAK;AAAA,IAC1B;AACA,WAAO;AAAA,EACT,CAAC;AACH;;"}