jellyfin-web/src/components/router/AsyncRoute.tsx

import React, { StrictMode } from 'react';
import type { RouteObject } from 'react-router-dom';

export enum AsyncRouteType {
    Stable,
    Experimental,
    Dashboard
}

export interface AsyncRoute {
    /** The URL path for this route. */
    path: string
    /**
     * The relative path to the page component in the routes directory.
     * Will fallback to using the `path` value if not specified.
     */
    page?: string
    /** The page type used to load the correct page element. */
    type?: AsyncRouteType
}

const importPage = (page: string, type: AsyncRouteType) => {
    switch (type) {
        case AsyncRouteType.Dashboard:
            return import(/* webpackChunkName: "[request]" */ `../../apps/dashboard/routes/${page}`);
        case AsyncRouteType.Experimental:
            return import(/* webpackChunkName: "[request]" */ `../../apps/experimental/routes/${page}`);
        case AsyncRouteType.Stable:
            return import(/* webpackChunkName: "[request]" */ `../../apps/stable/routes/${page}`);
    }
};

export const toAsyncPageRoute = ({
    path,
    page,
    type = AsyncRouteType.Stable
}: AsyncRoute): RouteObject => {
    return {
        path,
        lazy: async () => {
            const { default: Page } = await importPage(page ?? path, type);
            return {
                element: (
                    <StrictMode>
                        <Page />
                    </StrictMode>
                )
            };
        }
    };
};