jQuery : eq() vs get()

时间：2023-03-09 22:46:55
jQuery : eq() vs get()

.get(index) and .eq(index)

  • both return a single "element" from a jQuery object array, but they return the single element in different forms.

.eq(index)

  • returns it as a jQuery object, meaning the DOM element is wrapped in the jQuery wrapper, which means that it accepts jQuery functions.

.get(index)

  • return a raw DOM element. You may manipulate it by accessing its attributes and invoking its functions as you would on a raw DOM element. But it loses its identity as a jQuery-wrapped object, so a jQuery function won't work.

简言之：eq()获取的是jquery对象，能够使用jquery方法，get()获取的是原生dom元素，不能使用jquery方法．

Example：

 <!DOCTYPE html>

 <html lang="en">

   <head>

     <meta charset="utf-8">

     <meta http-equiv="X-UA-Compatible" content="IE=edge">

     <meta name="viewport" content="width=device-width, initial-scale=1">

     <title>eq() And get()</title>

   </head>

   <body style="height:2000px;">

     <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>

     <div id="outer_div">

       <div>

         <input text value="AAA"><br>

         <input text value="BBB"><br>

         <input text value="CCC"><br>

         <input text value="DDD"><br>

       </div>

     </div>

     <script>

         $(document).ready(function(){

           var $inputEq = $('#outer_div').find("input").eq(2);

           var $inputGet = $('#outer_div').find("input").get(2);

           console.log("inputEq :"+$inputEq);

           console.log("inputGet:"+$inputGet);

           console.log("inputEqValue :"+$inputEq.val());

           console.log("inputGetValue :"+$inputGet.value);

         });

         // Results:

         /*

           inputEq :[object Object]

           inputGet:[object HTMLInputElement]

           inputEqValue :CCC

           inputGetValue :CCC

         */

     </script>

   </body>

 </html>

相关：

.eq()

  • .eq( index )
  • .eq( indexFromEnd )
<ul>

  <li>list item 1</li>

  <li>list item 2</li>

  <li>list item 3</li>

  <li>list item 4</li>

  <li>list item 5</li>

</ul>

$( "li" ).eq( 2 ).css( "background-color", "red" );

$( "li" ).eq( -2 ).css( "background-color", "blue" );

:eq() Selector

  • jQuery( ":eq(index)" )
  • jQuery( ":eq(-index)" )

.get()

  • .get( index )
 <ul>

   <li id="foo">foo</li>

   <li id="bar">bar</li>

 </ul>

 console.log( $( "li" ).get( 0 ) );
  • .get()
  1. Retrieve the elements matched by the jQuery object.
  2. All of the matched DOM nodes are returned by this call, contained in a standard array.
 <ul>

   <li id="foo">foo</li>

   <li id="bar">bar</li>

 </ul>

 // javascript

 console.log( $( "li" ).get() );

 // result
[<li id="foo">, <li id="bar">]

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