二手车交易，返回按钮的控制

src/views/secondHandCar/indexList.vue

@@ -156,17 +156,17 @@ export default {
     }
   },
   mounted() {
+    const savedTab = sessionStorage.getItem('indexActiveTab');
+    this.activeTab = Number(savedTab); // 转换为数字
+    // }
     this.getList();
     document.addEventListener('visibilitychange', async (  ) => {
       let state = document.visibilityState
       if (state == 'hidden') {  // 用户离开了
-        console.log("用户离开了")
+        // console.log("用户离开了")
       }
       if (state == 'visible') {
-        console.log("用户visible")
-        // this.getList();
-        // this.activeTab=localStorage.getItem('indexActiveTab') || 0
-        console.log("this.activeTab",this.activeTab)
+        // console.log("用户visible")
       }
     });
   },
@@ -180,7 +180,8 @@ export default {
       }else{//求购查看
         this.$router.push({ name: "wantBuySale", query: { type:1 ,id:item.id ,queryType:2}})
       }
-      // localStorage.setItem('indexActiveTab', '');
+      // 保存当前的 activeTab
+      sessionStorage.setItem('indexActiveTab',String(this.activeTab) );
     },
     releaseHandle(type){
       if(type===1){//车源发布