keycloak-theme/src/KcApp/KcApp.tsx

import { lazy, Suspense } from "react";
import type { KcContext } from "./kcContext";
import KcAppBase, { defaultKcProps } from "keycloakify";
import { useI18n } from "./i18n";

const Terms = lazy(() => import("./Terms"));

export type Props = {
    kcContext: KcContext;
};

export default function KcApp({ kcContext }: Props) {
    const i18n = useI18n({ kcContext });

    //NOTE: Locales not yet downloaded
    if (i18n === null) {
        return null;
    }

    const props = {
        i18n,
        ...defaultKcProps,
        // NOTE: The classes are defined in ./KcApp.css
        "kcHeaderWrapperClass": "my-color my-font",
    };

    return (
        <Suspense>
            {(() => {
                switch (kcContext.pageId) {
                    case "register.ftl": return <Register {...{ kcContext, ...props }} />;
                    case "terms.ftl": return <Terms {...{ kcContext, ...props }} />;
                    case "my-extra-page-1.ftl": return <MyExtraPage1 {...{ kcContext, ...props }} />;
                    case "my-extra-page-2.ftl": return <MyExtraPage2 {...{ kcContext, ...props }} />;
                    default: return <KcAppBase {...{ kcContext, ...props }} />;
                }
            })()}
        </Suspense>
    );

}