Computed property ‘XX‘ was assigned to but it has no setter

注：在组件内为computed属性赋值的时候，如果没有显示的声明setter，会遇到Computed property ‘XX‘ was assigned to but it has no setter，根据控制台错误提示，组件中定义的computed属性缺少setter，需要设置get()和set()方法，解决办法如下：

computed: {
    setting: {
      get() {
        return this.xx
      },
      set(val) {
        this.xx = val;
      }
    },
  }