From: Evan You <yyx990803@gmail.com>
Date: Sun, 25 Feb 2024 09:35:19 +0000 (+0800)
Subject: fix(runtime-dom): avoid always resetting nullish option value
X-Git-Tag: v3.4.20~31
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ff130c470204086edaa093fb8fdc1247c69cba69;p=thirdparty%2Fvuejs%2Fcore.git

fix(runtime-dom): avoid always resetting nullish option value

close #10396
---

diff --git a/packages/runtime-dom/src/modules/props.ts b/packages/runtime-dom/src/modules/props.ts
index 3c09a12794..e9b3bca357 100644
--- a/packages/runtime-dom/src/modules/props.ts
+++ b/packages/runtime-dom/src/modules/props.ts
@@ -39,7 +39,8 @@ export function patchDOMProp(
     el._value = value
     // #4956: <option> value will fallback to its text content so we need to
     // compare against its attribute value instead.
-    const oldValue = tag === 'OPTION' ? el.getAttribute('value') : el.value
+    const oldValue =
+      tag === 'OPTION' ? el.getAttribute('value') || '' : el.value
     const newValue = value == null ? '' : value
     if (oldValue !== newValue) {
       el.value = newValue