[new feature] Sidebar: support use v-model to bind active key (#3698)

src/sidebar-item/index.js

@@ -23,6 +23,7 @@ export default createComponent({
   methods: {
     onClick() {
       this.$emit('click', this.index);
+      this.parent.$emit('input', this.index);
       this.parent.$emit('change', this.index);
       route(this.$router, this);
     }