Angular2 what's the benefit using getter method

Question

I can see some examples on the internet that's using getter method.

something like this,

setId(id: number) {
    this._id = id;
}

get id() {
    return this._id;
}

What're the benefits using that? beside using getId()

Answer 1

The most common case is not the getter, that's rather a side effect, but the setter allows to execute code (valdiation or similar) when the value is updated.

A common getter example is also fullName where you store first name and last name in two different fields and fullName just returns ${this.firstName} ${this.lastName}.

您也可以使用方法来完成getter和setter的操作，但是具有可以像简单字段一样使用的getter和setter的属性，在这种情况下，显而易见，进行计算似乎更为自然。