prototype (Array - JavaScript)

Extends the object with additional properties and methods.

Defined in

Syntax

prototype.name = value

Return value	Description
`name`	The name of the property or method.
`value`	The value of the property or method. For a property, this should be an expression. For a method, this should be a function definition.

Examples

(1) This computed label defines a property for the Array object then displays it.

Array.prototype.coname = ["Acme Corporation", "Chicago"];

Array.coname[0] + ", " + Array.coname[1]

(2) This computed label defines a function for the Array object then calls it.

Array.prototype.toProper = function() {
	for(var i=0; i<this.length; i++) {
		this[i] = this[i].left(1).toUpper() + this[i].substr(1).toLower();
	}
	return this;
}
var a = new Array("one", "two", "three", "four");
a.toProper() // [One, Two, Three, Four]

Additional Documentation | Trademarks |