JavaScript Objects Accesor properties (get and set)
Example
5
Treat a property as a combination of two functions, one to get the value from it, and another one to set the value in it.
The get property of the property descriptor is a function that will be called to retrieve the value from the property.
The set property is also a function, it will be called when the property has been assigned a value, and the new value will be passed as an argument.
You cannot assign a value or writable to a descriptor that has get or set
var person = { name: "John", surname: "Doe"};
Object.defineProperty(person, 'fullName', {
get: function () {
return this.name + " " + this.surname;
},
set: function (value) {
[this.name, this.surname] = value.split(" ");
}
});
console.log(person.fullName); // -> "John Doe"
person.surname = "Hill";
console.log(person.fullName); // -> "John Hill"
person.fullName = "Mary Jones";
console.log(person.name) // -> "Mary"
