TypeScript: propiedad de prototipo

La propiedad del prototipo le permite agregar propiedades y métodos a un objeto.

Ejemplo

function employee(id:number,name:string) { 
   this.id = id 
   this.name = name 
} 
var emp = new employee(123,"Smith") 
employee.prototype.email="[email protected]" 
console.log("Employee 's Id: "+emp.id) 
console.log("Employee's name: "+emp.name) 
console.log("Employee's Email ID: "+emp.email)

Al compilar, generará el siguiente código JavaScript:

//Generated by typescript 1.8.10 
function employee(id, name) { 
   this.id = id; 
   this.name = name; 
} 
var emp = new employee(123, "Smith"); 
employee.prototype.email = "[email protected]"; 
console.log("Employee 's Id: " + emp.id); 
console.log("Employee's name: " + emp.name); 
console.log("Employee's Email ID: " + emp.email);

Su salida es la siguiente:

Employee’s Id: 123 
Emaployee’s name: Smith 
Employee’s Email ID: [email protected]

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