From ceba4c3180b8718d70d70ef74eee75433301d4e9 Mon Sep 17 00:00:00 2001
From: OneNail <31649110+OneNail@users.noreply.github.com>
Date: Sat, 26 Jun 2021 02:07:01 +0800
Subject: [PATCH] fix(plugin-legacy): chunk may not exist (#3886)

---
 packages/plugin-legacy/index.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/plugin-legacy/index.js b/packages/plugin-legacy/index.js
index 63d18954e48eaa..5ef810d212da11 100644
--- a/packages/plugin-legacy/index.js
+++ b/packages/plugin-legacy/index.js
@@ -303,6 +303,7 @@ function viteLegacyPlugin(options = {}) {
     },
 
     transformIndexHtml(html, { chunk }) {
+      if (!chunk) return
       if (chunk.fileName.includes('-legacy')) {
         // The legacy bundle is built first, and its index.html isn't actually
         // emitted. Here we simply record its corresponding legacy chunk.