From 96573dbcafb138c91b524ef9995de44203d95246 Mon Sep 17 00:00:00 2001
From: Michael Warner <61156732+mwarnerdotme@users.noreply.github.com>
Date: Wed, 2 Mar 2022 23:22:32 -0700
Subject: [PATCH] fix(hmr): client pinging behind a proxy on websocket
 disconnect (fix #4501) (#5466)

---
 packages/vite/src/client/client.ts | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/packages/vite/src/client/client.ts b/packages/vite/src/client/client.ts
index 988fd45291983f..076e11e1e31aba 100644
--- a/packages/vite/src/client/client.ts
+++ b/packages/vite/src/client/client.ts
@@ -214,9 +214,14 @@ async function waitForSuccessfulPing(ms = 1000) {
   // eslint-disable-next-line no-constant-condition
   while (true) {
     try {
-      await fetch(`${base}__vite_ping`)
-      break
+      const pingResponse = await fetch(`${base}__vite_ping`)
+
+      // success - 2xx status code
+      if (pingResponse.ok) break
+      // failure - non-2xx status code
+      else throw new Error()
     } catch (e) {
+      // wait ms before attempting to ping again
       await new Promise((resolve) => setTimeout(resolve, ms))
     }
   }