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javascriptjqueryfind
Čamo
Čamo

Reputation: 4172

JQuery children().find(x) returns bad result - prevObject

Why do I can't get required result from this code:

element.children().find('ul').first();

It returns prevObject.

When I use:

element.children('ul')

It works well. I dont understand what the difference is.

My html is like this:

<div>
    <ul>
        <li>adssfsdf</li>
        <li>dfdfghdfh</li>
    </ul>
</div>

You can see that problem at jsfiddle .

Upvotes: 2

Views: 814

Answers (4)

Vikas Khartude
Vikas Khartude

Reputation: 90

element.children().find('ul').first()
as per your html 
element.children() return the ul element  
element.children().find('ul') return nothing as you are finding the ul inside ul element
Because of this your css is not applying.

Updated fiddle

Upvotes: 0

Umesh Sehta
Umesh Sehta

Reputation: 10683

Check the children and find functions clearly here. i have mentioned the comments as well.

<div>
    <ul>
        <li>adssfsdf</li>
        <li>dfdfghdfh</li>
    </ul>
</div> 

$('div').children('ul').css({'color':'red'});  // children ul inside div
$('div').children('ul:first').css({'color':'red'}); // first ul inside div
$('div').find('ul').css({'color':'blue'}); // ul inside div
$('div').children('ul').find('li:first').css({'color':'green'}); // first li of ul inside div

check her also: https://jsfiddle.net/aezyjgtt/2/

Upvotes: 0

Amadan
Amadan

Reputation: 198436

find searches for descendants that match the selector. children searches for children that match the selector. Say you have this tree:

A -> B -> C -> D

Then,

$(".A").children() // B

$(".A").find() // B, C, D

$(".A").children().find() // C, D

Why does the last one find only C and D? Because it searches the descendants of the children.

In your case - you first get the children, then search for the descendants of those children that are ul. But the children have no descendants, and you get no results. When you do .children('ul'), you are looking for children who are ul - and there is indeed one such.

Upvotes: 1

Mritunjay
Mritunjay

Reputation: 25892

From the jquery docs

.find( selector )

Description: Get the descendants of each element in the current set of matched elements, filtered by a selector, jQuery object, or element.

So element.find('ul') gets all the ul children of element

If you want to get ul using find

you should say

element.find('ul').first();

updated fiddle

Upvotes: 0

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