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jQuery : eq() vs get()

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挽巷
挽巷 2020-11-28 03:50

I\'m new to jQuery, and I\'m wondering what the difference is between jQuery\'s get() and eq() functions. I may misunderstand what the get()

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  • 忘了有多久
    2020-11-28 04:18

    I am giving an example that explains the points given by others here. consider the following code

    <div id="example">
    Some text
    <div>Another div</div>
    <!--A comment-->
</div>

    and the corresponding js code,

    $(document).ready(function() {
    var div = $("#example").get(0);
    console.log(typeof(div));
    console.log(div);
    console.log("XXXXXXXXX");
    var div_eq=$('#example').eq(0);
    console.log(typeof(div_eq));
    console.log(div_eq);
    });

    This is what you will see

     object
excercise1.js (line 5)
<div id="example">
excercise1.js (line 6)
XXXXXXXXX
excercise1.js (line 7)
object
excercise1.js (line 9)
Object[div#example]

    The first is a DOM object while the latter is a Jquery-wrapped object where you could call Jquery methods

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  • 爱一瞬间的悲伤
    2020-11-28 04:22

    get(0)(docs) returns the first DOM element in the set.

    eq(0)(docs) returns the first DOM element in the set, wrapped in a jQuery object.

    That's why .fadeIn("slow"); doesn't work when you do .get(0). A DOM element doesn't have a fadeIn() method, but a jQuery object does.

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  • 不知归路
    2020-11-28 04:23

    get() returns a DOM element whereas :eq() and eq() return a jQuery element. Since DOM elements have no method fadeIn() it fails.

    http://api.jquery.com/get/

    Description: Retrieve the DOM elements matched by the jQuery object.

    http://api.jquery.com/eq-selector/

    Description: Select the element at index n within the matched set.

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  • 遇见更好的自我
    2020-11-28 04:26

    .get() and .eq() both return a single "element" from a jQuery object array, but they return the single element in different forms.

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

    .get() returns an array of raw DOM elements. You may manipulate each of them 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 like .fadeIn won't work.

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  • 死守一世寂寞
    2020-11-28 04:34

    eq(i) retrieves the ith member in the receiver's set as a jQuery object, while get(i) returns the member at the ith position as a DOM element.

    The reason why this doesn't work:

    $("h2").get(0).fadeIn("slow");

    Is because the h2 DOM element doesn't have a method called fadeIn.

    You should use eq(0) here instead.

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  • 独厮守ぢ
    2020-11-28 04:35

    jQuery eq() method selects a HTML element with a specific index number.

    Here is an example of that

    <body>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
</body>

$( "body" ).find( "div" ).eq( 2 ).addClass( "red" );
// it finds the second div in the html body and change it to red color.

    Source: http://www.snoopcode.com/JQuery/jquery-eq-selector

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