Dev Blog
JavaScript allows You to define getter and setter for property. So
that this property can compute value and return it. This can be
used to sanitize value or to return value based
on other object values. This can be done with
Object.defineProperty function. It takes object as a
first argument, property name as a second argument - defined as
string. The third argument is object defining get
and set methods, as well as indicating whether
property should be enumerable. Enumerable property will be for
example included in loops.
When defining in class constructor, ensure that the parent
constructor will be called using
super keyword.
Example of getter and setter
class User extends Model
firstName: '' lastName: '' fullName: ''
constructor: (data) ->
Object.defineProperty @, 'fullName', {
get: () =>
return "#{@firstName} #{@lastName}"
enumerable: true,
set: (value) -> # Ignore
}
super(data)
In the example above, accessing fullName property
will concatenate firstName and
lastName.
Usage of example User class
user = new User
user.firstName = 'John'
user.lastName = 'Smith'
console.log user.fullName
This will output John Smith to browsers console.
