工单报备按钮加防重复点击，提交报备做必填项的判断

src/views/index/vehicleAdd.vue

@@ -200,10 +200,7 @@ export default {
       this.isJoin=e
     },
     cancelBtn(){//取消车辆
-      this.isJoin='';
-      this.trailerService='';
-      this.smallRepairService='';
-      this.carNum=''
+      this.$router.back()
     },
     async submitBtn(){
       console.log("提交车辆");