jquery class Array

1. What is an array of classes

Multiple DOM objects encapsulated by jquery objects

Class: Refers to a similar

Have their own unique method of operation

2. Operation of class array

Length Property
Each (FN) iterates through an array of classes and FN is used to process DOM objects. In FN, this represents the DOM object that is being traversed. The FN function can add a parameter I to represent the subscript of the DOM object being traversed (starting at 0)
EQ (Index): Takes out the DOM object with subscript equal to index
Get (): Returns an array consisting of a DOM object
Index (OBJ): Returns the subscript of a DOM or jquery object in an array of classes.

<ul>      <li>item1</li>      <li>item2</li>      <li>item3</li>    </ul>    var $obj =$ (' ul Li ');    $obj. Each (function(i) {      if(i==0)        $ (this). CSS (' font-size ', ' 30px ');    });

jquery class Array