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

Modern and scalable routing for React applications

{"version":3,"file":"lazyRouteComponent.cjs","sources":["../../src/lazyRouteComponent.tsx"],"sourcesContent":["import * as React from 'react'\nimport { isModuleNotFoundError } from '@tanstack/router-core'\nimport type { AsyncRouteComponent } from './route'\n\nexport function lazyRouteComponent<\n  T extends Record<string, any>,\n  TKey extends keyof T = 'default',\n>(\n  importer: () => Promise<T>,\n  exportName?: TKey,\n): T[TKey] extends (props: infer TProps) => any\n  ? AsyncRouteComponent<TProps>\n  : never {\n  let loadPromise: Promise<any> | undefined\n  let comp: T[TKey] | T['default']\n  let error: any\n  let reload: boolean\n\n  const load = () => {\n    if (!loadPromise) {\n      loadPromise = importer()\n        .then((res) => {\n          loadPromise = undefined\n          comp = res[exportName ?? 'default']\n        })\n        .catch((err) => {\n          // We don't want an error thrown from preload in this case, because\n          // there's nothing we want to do about module not found during preload.\n          // Record the error, the rest is handled during the render path.\n          error = err\n          // If the load fails due to module not found, it may mean a new version of\n          // the build was deployed and the user's browser is still using an old version.\n          // If this happens, the old version in the user's browser would have an outdated\n          // URL to the lazy module.\n          // In that case, we want to attempt one window refresh to get the latest.\n          if (isModuleNotFoundError(error)) {\n            if (\n              error instanceof Error &&\n              typeof window !== 'undefined' &&\n              typeof sessionStorage !== 'undefined'\n            ) {\n              // Again, we want to reload one time on module not found error and not enter\n              // a reload loop if there is some other issue besides an old deploy.\n              // That's why we store our reload attempt in sessionStorage.\n              // Use error.message as key because it contains the module path that failed.\n              const storageKey = `tanstack_router_reload:${error.message}`\n              if (!sessionStorage.getItem(storageKey)) {\n                sessionStorage.setItem(storageKey, '1')\n                reload = true\n              }\n            }\n          }\n        })\n    }\n\n    return loadPromise\n  }\n\n  const lazyComp = function Lazy(props: any) {\n    // Now that we're out of preload and into actual render path,\n    if (reload) {\n      // If it was a module loading error,\n      // throw eternal suspense while we wait for window to reload\n      window.location.reload()\n      throw new Promise(() => {})\n    }\n    if (error) {\n      // Otherwise, just throw the error\n      throw error\n    }\n\n    if (!comp) {\n      throw load()\n    }\n\n    return React.createElement(comp, props)\n  }\n\n  ;(lazyComp as any).preload = load\n\n  return lazyComp as any\n}\n"],"names":["isModuleNotFoundError","React"],"mappings":";;;;;;;;;;;;;;;;;;;;;AAIO,SAAS,mBAId,UACA,YAGQ;AACR,MAAI;AACJ,MAAI;AACJ,MAAI;AACJ,MAAI;AAEJ,QAAM,OAAO,MAAM;AACjB,QAAI,CAAC,aAAa;AAChB,oBAAc,SAAA,EACX,KAAK,CAAC,QAAQ;AACb,sBAAc;AACd,eAAO,IAAI,cAAc,SAAS;AAAA,MACpC,CAAC,EACA,MAAM,CAAC,QAAQ;AAId,gBAAQ;AAMR,YAAIA,WAAAA,sBAAsB,KAAK,GAAG;AAChC,cACE,iBAAiB,SACjB,OAAO,WAAW,eAClB,OAAO,mBAAmB,aAC1B;AAKA,kBAAM,aAAa,0BAA0B,MAAM,OAAO;AAC1D,gBAAI,CAAC,eAAe,QAAQ,UAAU,GAAG;AACvC,6BAAe,QAAQ,YAAY,GAAG;AACtC,uBAAS;AAAA,YACX;AAAA,UACF;AAAA,QACF;AAAA,MACF,CAAC;AAAA,IACL;AAEA,WAAO;AAAA,EACT;AAEA,QAAM,WAAW,SAAS,KAAK,OAAY;AAEzC,QAAI,QAAQ;AAGV,aAAO,SAAS,OAAA;AAChB,YAAM,IAAI,QAAQ,MAAM;AAAA,MAAC,CAAC;AAAA,IAC5B;AACA,QAAI,OAAO;AAET,YAAM;AAAA,IACR;AAEA,QAAI,CAAC,MAAM;AACT,YAAM,KAAA;AAAA,IACR;AAEA,WAAOC,iBAAM,cAAc,MAAM,KAAK;AAAA,EACxC;AAEE,WAAiB,UAAU;AAE7B,SAAO;AACT;;"}