import { useEffect, useState } from "react"; export function useDomainDefine(): { isTestServer: boolean } { const [isTestServer, setIsTestServer] = useState(false); useEffect(() => { const host = window.location.hostname; let isTest = host.includes("s"); setIsTestServer(isTest); }, []); return { isTestServer }; } const host = window.location.hostname; export const isTestServer = host.includes("s");