Function loadRoute

packages/next/src/client/route-loader.ts:332–377

(route: string, prefetch?: boolean)

      })
    },
    loadRoute(route: string, prefetch?: boolean) {
      return withFuture<RouteLoaderEntry>(route, routes, () => {
        let devBuildPromiseResolve: () => void

        if (process.env.NODE_ENV === 'development') {
          devBuildPromise = new Promise<void>((resolve) => {
            devBuildPromiseResolve = resolve
          })
        }

        return resolvePromiseWithTimeout(
          getFilesForRoute(assetPrefix, route)
            .then(({ scripts, css }) => {
              return Promise.all([
                entrypoints.has(route)
                  ? []
                  : Promise.all(scripts.map(maybeExecuteScript)),
                Promise.all(css.map(fetchStyleSheet)),
              ] as const)
            })
            .then((res) => {
              return this.whenEntrypoint(route).then((entrypoint) => ({
                entrypoint,
                styles: res[1],
              }))
            }),
          markAssetError(new Error(`Route did not complete loading: ${route}`)),
          devBuildPromise
        )
          .then(({ entrypoint, styles }) => {
            const res: RouteLoaderEntry = Object.assign<
              { styles: RouteStyleSheet[] },
              RouteEntrypoint
            >({ styles: styles! }, entrypoint)
            return 'error' in entrypoint ? entrypoint : res
          })
          .catch((err) => {
            if (prefetch) {
              // we don't want to cache errors during prefetch
              throw err
            }
            return { error: err }
          })
          .finally(() => devBuildPromiseResolve?.())
      })
    },
    prefetch(route: string): Promise<void> {
      // https://github.com/GoogleChromeLabs/quicklink/blob/453a661fa1fa940e2d2e044452398e38c67a98fb/src/index.mjs#L115-L118
      // License: Apache 2.0