Javascript [Electronic resources] : The Definitive Guide (4th Edition) نسخه متنی

Availability

JavaScript 1.5; JScript 5.5; ECMAScript
v3

Synopsis

function.call(thisobj, args...)

Arguments

thisobj

The object on which function is to be
invoked. In the body of the function,
thisobj becomes the value of the
this keyword.

args...

Any number of arguments, which will be passed as arguments to
function.

Returns

Whatever value is returned by the invocation of
function.

Throws

TypeError

If this method is invoked on an object that is not a function.

Description

call( ) invokes the specified
function as if it were a method of
thisobj, passing it any arguments that
follow thisobj in the argument list. The
return value of call( ) is the value returned by
the function invocation. Within the body of the function, the
this keyword refers to the
thisobj object.

Use Function.apply( ) instead if you want to
specify the arguments to pass to the function in an array.

Example

// Call the default Object.toString(  ) method on an object that
// overrides it with its own version of the method. Note no arguments.
Object.prototype.toString.call(o);

See Also

Function.apply( )