Creates a new function.
Syntax
function functionName([argname1 [, ...[, argnameN]]])
{
body
}
Syntax
functionName = new Function( [argname1, [... argnameN,]] body );
Parameters
functionName
Required. The name of the newly created function
argname1...argnameN
Optional. A list of arguments the function accepts.
body
Optional. A string that contains the block of JavaScript code to be executed when the function is called.
Remarks
The function is a basic data type in JavaScript. Syntax 1 creates a function value that JavaScript converts into a Function object when necessary. JavaScript converts Function objects created by Syntax 2 into function values at the time the function is called.
Syntax 1 is the standard way to create new functions in JavaScript. Syntax 2 is an alternative form used to create function objects explicitly.
For example, to declare a function that adds the two arguments passed to it, you can do it in one of two ways:
Example 1
function add(x, y)
{
return(x + y);
}
Example 2
var add = function(x, y) {
return(x+y);
}
In either case, you call the function with a line of code similar to the following:
add(2, 3);
Note
When you call a function, make sure that you always include the parentheses and any required arguments. Calling a function without parentheses causes the function itself to be returned, instead of the return value of the function.
Properties
0...n Properties |arguments Property | callee Property | caller Property | constructor Property | length Property (Function) | prototype Property
Methods
apply Method | bind Method | call Method | toString Method | valueOf Method
Requirements
Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards, Internet Explorer 11 standards. Also supported Store apps (Windows 8 and Windows Phone 8.1). See Version Information.