TimeSelect: fix fieldReset when initialValue is empty string (#12010)

jikkai · web-flow · commit e4de2b46bf2a · 2018-07-16T19:18:29.000+08:00
diff --git a/packages/date-picker/src/picker.vue b/packages/date-picker/src/picker.vue
@@ -713,7 +713,7 @@ export default {
     },
 
     handleFieldReset(initialValue) {
-      this.userInput = initialValue;
+      this.userInput = initialValue === '' ? null : initialValue;
     },
 
     handleFocus() {
