JavaScript Array prototype Constructor
Example
Make a new array method that transforms array values into upper case:
Array.prototype.myUcase = function() {
for (i = 0; i < this.length; i++) {
this[i] = this[i].toUpperCase();
}
};
Make an array, then call the myUcase method:
var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.myUcase();
Try it Yourself »
Definition and Usage
The prototype constructor allows you to add new properties and methods to the Array() object.
When constructing a property, ALL arrays will be given the property, and its value, as default.
When constructing a method, ALL arrays will have this method available.
Note: Array.prototype does not refer to a single array, but to the Array() object itself.
Note: Prototype is a global object constructor which is available for all JavaScript objects.
Browser Support
| Property | |||||
|---|---|---|---|---|---|
| prototype | Yes | Yes | Yes | Yes | Yes |
Syntax
Array.prototype.name = value
Related Pages
JavaScript Tutorial: JavaScript Arrays
JavaScript Tutorial: JavaScript Constructors
❮ JavaScript Array Reference
