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

yyx990803 · yyx990803 · commit ff130c470204 · 2024-02-25T17:35:19.000+08:00
close #10396
diff --git 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
