JavaScript API use detail has been updated ...

1. Call () and apply (), examples are as follows:

function Add (A, B)
{
alert (A+B);
}
function Sub (A, b)
{
Alert (A-B);
}

Add.call (sub,3,1);

Note: This example means that the sub inherits Add,add.call (sub,3,1) = = Add (3,1), so the result is: alert (4); Note: The function in JS is actually an object, and the function name is a reference to a function object.

Note : Replace with sub, which adds an Add method to sub now;

i.e. Add.call (sub, 3, 1);

Equivalent
Sub.add = function Add (A, B)
{
alert (A+B);
}

A different example:

function Class1 ()
{
THIS.name = "Class1";

This.shownam = function ()
{
alert (this.name);
}
}

function Class2 ()
{
THIS.name = "Class2";
}

var C1 = new Class1 ();
var C2 = new Class2 ();

C1.showNam.call (C2);

Note: Call means to put C1 method on the C2, the original C2 is no Shownam () method, now is C1 Shownam () method put to C2 to execute, so this.name should be class2, the result of execution is: alert (" Class2 ");

JavaScript API use detail has been updated ...