From a64ff0856ac10a40544d8af160c6aab5db3f4693 Mon Sep 17 00:00:00 2001
From: Max Duval <max.duval@theguardian.com>
Date: Thu, 25 Aug 2022 09:44:51 +0100
Subject: [PATCH] fix: safe performance.getEntriesByType

Some browsers do not support this method, so we check for
its existence before measuring the time taken.

Fixes CLIENT-SIDE-PROD-CSXR
Fixes CLIENT-SIDE-PROD-CTRH
---
 dotcom-rendering/src/web/browser/islands/doHydration.ts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dotcom-rendering/src/web/browser/islands/doHydration.ts b/dotcom-rendering/src/web/browser/islands/doHydration.ts
index 5e26a2e5e70..ed0165e6c9a 100644
--- a/dotcom-rendering/src/web/browser/islands/doHydration.ts
+++ b/dotcom-rendering/src/web/browser/islands/doHydration.ts
@@ -48,6 +48,8 @@ export const doHydration = (
 			return { clientOnly, timeTaken };
 		})
 		.then(({ clientOnly, timeTaken }) => {
+			if (!('getEntriesByType' in window.performance)) return;
+
 			// Log performance info
 			const { duration: download = -1 } =
 				window.performance