从观察者调用函数时，发生“ TypeError ...不是函数”的错误

Question

从观察者调用函数时，发生“ TypeError ...不是函数”错误：

selected_project_id : {
              type: Number,
              observer: '_selected_project_idChanged'
},


...
_selected_project_idChanged(selected_project_id) {
                      this.some_function();
}

  

未捕获的TypeError：this.some_function不是HTMLElement上的函数

Answer 1

参数的类型应为Object

selected_project_id : {
                  type: Oblect,
                  observer: '_selected_project_idChanged'
    },