Accessors

We can also implement getters and setters to the properties to control accessing them from the client. We can intercept a process before setting a value to a property variable or before getting a value of the property variable:

var updateCustomerNameAllowed = true; 
class Customer { 
    private _name: string; 
    get name: string { 
          return this._name; 
   } 
    set name(newName: string) { 
          if (updateCustomerNameAllowed == true) { 
               this._name = newName; 
          } 
          else { 
               alert("Error: Updating Customer name not allowed!"); 
          } 
   } 
} 

Here, the setter for the name property ensures that the customer name can be updated. Otherwise, it shows an alert message to the effect that it is not possible.