Object constructor
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Object
In JavaScript you create an object instance using the constructor Object.
Description
Creates an Object wrapper.
Syntax
| Signature | Description |
|---|---|
var anObject = new Object([value]); | Creates an Object wrapper. |
Parameters
| Parameter | Description |
|---|---|
value | An optional initial value for the object.
|
Class Properties
| Class Property | Description |
|---|---|
prototype | Enables property assignment to objects of type Object and is inherited by every object. |
Instance Properties
| Instance Property | Description |
|---|---|
constructor | Returns a reference to the function that created the prototype and is inherited by every object. |
Class Methods
None.
Instance Methods
| Instance Method | Description |
|---|---|
Getter (Accessor) MethodsThese methods DO NOT modify the Object object |
|
Methods of the Object class, all of which are inherited by every object via prototype. | |
hasOwnProperty() | Returns a boolean indicating whether the object has the specified direct property. |
isPrototypeOf() | Returns a boolean indicating whether the object exists in another objects hierarchy. |
toLocaleString() | Returns a string representation of an object. |
toString() | Returns a string representation of an object. |
valueOf() | Returns the primitive value of the specified object. |
Setter (Mutator) MethodsThese methods DO modify the Object object |
|
| None. | |
Examples
The code below creates an object with some properties.
/*
Create an object that holds first and last name properties
*/
var homeOwner = new Object();
homeOwner.firstName = 'Teddy';
homeOwner.lastName = 'Bear';
alert(homeOwner.firstName + ' ' + homeOwner.lastName);
/*
We could just as easily assign the surname property with a typo as below
and then scratched our heads when we tried to access the nameStore.lastName
property. Be careful what you type when assigning object properties
*/
homeOwner.lastNaem = Bear;
Related Tutorials
JavaScript Basic Tutorials - Lesson 7 - Objects