| Object |
Core JavaScript 1.0; JScript 1.0; ECMA v1 |
| the superclass of all JavaScript objects |
|
Constructor
new Object( );
This constructor creates an empty object to which you can add
arbitrary properties.
Properties
All JavaScript objects, how ever they are created, have the following
properties.
- constructor
-
A reference to the JavaScript function that was the constructor for
the object. JS 1.1; JScript 2.0; ECMA v1.
Methods
All JavaScript objects, how ever they are created, have the following
methods.
- hasOwnProperty( propname)
-
Returns true if the object has a non-inherited
property with the specified name. Returns false if
the object does not have a property with the specified name, or if it
inherits that property from its prototype object. JS 1.5; JScript
5.5; ECMA v3.
- isPrototypeOf( o)
-
Returns true if this object is the prototype of
o. Returns false if
o is not an object or if this object is
not its prototype. JS 1.5; JScript 5.5; ECMA v3.
- propertyIsEnumerable( propname)
-
Returns true if this object has a non-inherited
enumerable property with the specified name, and returns
false otherwise. Enumerable properties are those
that are enumerated by for/in loops. JS 1.5;
JScript 5.5; ECMA v3.
- toLocaleString( )
-
Returns a localized string representation of the object. The default
implementation of this method simply calls toString(
), but subclasses may override it to provide localization.
JS 1.5; JScript 5.5; ECMA v3.
- toString( )
-
Returns a string representation of the object. The implementation of
this method provided by the Object class is quite generic and does
not provide much useful information. Subclasses of Object typically
override this method by defining their own toString(
) method that produces more useful output. JS 1.0; JScript
2.0; ECMA v1.
- valueOf( )
-
Returns the primitive value of the object, if any. For objects of
type Object, this method simply returns the object itself. Subclasses
of Object, such as Number and Boolean, override this method to return
the primitive value associated with the object. JS 1.1; JScript 2.0;
ECMA v1.
See Also
Array, Boolean, Function, Number, String
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