Function installDeepDiagnostics

packages/vite/hmr/client/index.ts:207–279

()

}

function installDeepDiagnostics() {
	if (!VERBOSE) return;
	const g: any = globalThis as any;
	try {
		// Patch Frame.navigate to log calls and a short stack
		const F = getCore('Frame') || g.Frame;
		if (F?.prototype && !(F.prototype as any).__ns_diag_nav__) {
			const orig = F.prototype.navigate;
			if (typeof orig === 'function') {
				(F.prototype as any).__ns_diag_nav__ = true;
				// Simple duplicate navigation suppression in dev: if the same target is navigated twice within a short window, ignore the 2nd.
				F.prototype.navigate = function (...args: any[]) {
					try {
						const entry = args[0];
						const summary = summarizeNavEntry(entry);
						const stack = (new Error().stack || '').split('\n').slice(2, 8).join('\n');
						console.log('[diag][Frame.navigate]', {
							frameCtor: this?.constructor?.name,
							summary,
							stack,
						});
						try {
							const gAny: any = globalThis as any;
							const key = JSON.stringify({
								k: 'nav',
								m: summary.moduleName || '',
								c: !!summary.hasCreate,
								ch: !!summary.clearHistory,
								a: !!summary.animated,
							});
							const now = Date.now();
							const last = gAny.__NS_DIAG_LAST_NAV__;
							if (last && last.key === key && now - last.t < 300) {
								console.warn('[diag][Frame.navigate] duplicate nav suppressed (dev)', { withinMs: now - last.t, key });
								return; // suppress duplicate
							}
							gAny.__NS_DIAG_LAST_NAV__ = { key, t: now };
						} catch {}
					} catch {}
					return orig.apply(this, args as any);
				} as any;
			}
		}
	} catch {}
	try {
		// Wrap Application.resetRootView to log argument classification and stack
		const App = getCore('Application') || g.Application;
		const proto = App && Object.getPrototypeOf(App);
		const orig = (App && App.resetRootView) || (proto && proto.resetRootView);
		if (typeof orig === 'function' && !(g as any).__NS_DIAG_RESET_WRAPPED__) {
			const wrapped = function __ns_diag_resetRootView(this: any, entry: any) {
				try {
					const classification = classifyResetArg(entry);
					const stack = (new Error().stack || '').split('\n').slice(2, 8).join('\n');
					console.log('[diag][Application.resetRootView]', {
						classification,
						stack,
					});