From 9c91b130416e9acc8d4bd8b7fc585224e3ae97de Mon Sep 17 00:00:00 2001
From: neverland <jait.chen@foxmail.com>
Date: Sun, 20 Apr 2025 21:21:44 +0800
Subject: [PATCH] fix(Picker): update selected values when modelValue is
 cleared (#13445)

---
 packages/vant/src/picker/Picker.tsx          | 9 ++++++---
 packages/vant/src/picker/test/index.spec.tsx | 1 +
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/packages/vant/src/picker/Picker.tsx b/packages/vant/src/picker/Picker.tsx
index 60747676c..571259e7e 100644
--- a/packages/vant/src/picker/Picker.tsx
+++ b/packages/vant/src/picker/Picker.tsx
@@ -147,9 +147,7 @@ export default defineComponent({
     };
 
     const getEventParams = () => ({
-      selectedValues: selectedValues.value.length
-        ? selectedValues.value.slice(0)
-        : resetSelectedValues(currentColumns.value),
+      selectedValues: selectedValues.value.slice(0),
       selectedOptions: selectedOptions.value,
       selectedIndexes: selectedIndexes.value,
     });
@@ -299,9 +297,14 @@ export default defineComponent({
           selectedValues.value = newValues.slice(0);
           lastEmittedModelValue = newValues.slice(0);
         }
+
+        if (props.modelValue.length === 0) {
+          resetSelectedValues(currentColumns.value);
+        }
       },
       { deep: true },
     );
+
     watch(
       selectedValues,
       (newValues) => {
diff --git a/packages/vant/src/picker/test/index.spec.tsx b/packages/vant/src/picker/test/index.spec.tsx
index 8714c83b7..c4c1d72f2 100644
--- a/packages/vant/src/picker/test/index.spec.tsx
+++ b/packages/vant/src/picker/test/index.spec.tsx
@@ -490,6 +490,7 @@ test('should emit correct values when clicking confirm button during column scro
   ]);
 });
 
+// https://github.com/youzan/vant/issues/13423
 test('should emit default values when clear modelValue', async () => {
   const columns = [
     { text: '1', value: '1' },