JQuery. fn explanation

JQuery. fn explanation

The learning of jQuery is not very difficult, and the difference between jQuery. fn. extend (object) and jQuery. extend (object) is different.

The following is a detailed explanation:

JQuery. extend (object); adds a new static method for the class to extend the jQuery class itself;

JQuery. fn. extend (object); add a method to the jQuery object;

Eg:

$. Extend ({

Add: function (a, B) {return a + B ;}

});

Add a "static method" for jQuery as add, and then you can use this method in the place where jQuery is introduced,

$. Add (3, 4); // return 7

JQuery. fn = jQuery. prototype is equivalent to adding attributes to the jQuery class, that is, adding "member functions" to the jQuery class ". JQuery class instances can use this "member function ".

$. Fn. close = function (){}

$. Close = function (){}

The most obvious difference is when calling:

 

$ ('# Test'). close () and $. close ();