Merge branch 'dev' into next

src/index-bar/index.js

@@ -54,7 +54,7 @@ export default createComponent({
     },
   },
 
-  emits: ['select'],
+  emits: ['select', 'change'],
 
   setup(props, { emit, slots }) {
     const root = ref();
@@ -172,6 +172,12 @@ export default createComponent({
       }
     );
 
+    watch(activeAnchor, (value) => {
+      if (value) {
+        emit('change', value);
+      }
+    });
+
     const renderIndexes = () =>
       props.indexList.map((index) => {
         const active = index === activeAnchor.value;