;(window as any).__INSTRUMENTATION_CLIENT_EXECUTED_AT = performance.now() const start = performance.now() while (performance.now() - start < 20) { // Intentionally block for 20ms to test instrumentation timing } export function onRouterTransitionStart(href: string, navigateType: string) { const pathname = new URL(href, window.location.href).pathname console.log(`[Router Transition Start] [${navigateType}] ${pathname}`) }