Constructors and prototypes

The Javascript language does not have classes, it supports only objects. However, a common behavior of objects can be implemented using prototypes.

Adding class properties and methods

Even if objects are not class members they can share a set of common properties and methods.

Currently Yate does not automatically provide a prototype for objects. This can be added easily to a constructor:

function MyConstructor()
{
    this.MyProperty = 0;
}

MyConstructor.prototype = new Object;

Now shared properties and methods can be added to the prototype:

MyConstructor.prototype.SharedProperty = 1;

MyConstructor.prototype.MyMethod = function(x)
{
    return x + this.MyProperty;
};

IMPORTANT: There's a semicolon after the closing brace as this is an assignment and not a function declaration

See also

• Javascript

External links

• An easy way to understand JavaScript’s prototypal inheritance
• Constructors considered mildly confusing