packages/vant/src/calendar/Calendar.tsx

@@ -406,12 +406,7 @@ export default defineComponent({
             );
 
             if (disabledDay) {
-              const endDay = getPrevDay(disabledDay);
-              if (compareDay(startDay, endDay) === -1) {
-                select([startDay, endDay]);
-              } else {
-                select([date]);
-              }
+              select([startDay, getPrevDay(disabledDay)]);
             } else {
               select([startDay, date], true);
             }

packages/vant/src/composables/use-height.ts

@@ -4,15 +4,11 @@ import { Ref, ref, onMounted, nextTick } from 'vue';
 export const useHeight = (element: Element | Ref<Element | undefined>) => {
   const height = ref<number>();
 
-  const setHeight = () => {
-    height.value = useRect(element).height;
-  };
-
-  onMounted(() => {
-    nextTick(setHeight);
-    // https://github.com/youzan/vant/issues/10131
-    setTimeout(setHeight, 100);
-  });
+  onMounted(() =>
+    nextTick(() => {
+      height.value = useRect(element).height;
+    })
+  );
 
   return height;
 };