jQuery选择所有最接近的子代

Question

I want to add the .red-border class to a #container div and all <td> s in the closest <tr> .

But by using .closest() I only get the elements immediate parent <td> .

Is there a way I can target all children of the closest <tr> ?

My code is below.

My current erroneous JS:

$('#myelement').closest('.container, tr td').addClass('red-border');

Obviously, this only targets 1 td . I want to encompass all of them.

My HTML:

<div id="container">
 <span class="myelement">element</span>
</div>

<table>
  <tr>
    <td></td>
    <td><span class="myelement">element</span></td>
    <td></td>
  </tr>
</table>

Edit: normally I might use the .find() function but this wouldnt work with the or operator.

Answer 1

I hope this is what you are expecting. You need to iterate through each tr and add red-border class to its first td with td:first selector as below

 $(document).ready(function() { $('#container').addClass('red-border'); $('tr').each(function(){ $(this).find('td:first').addClass('red-border'); }) }) 

 .red-border{ border:red 2px solid; } 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <div id="container"> <span class="myelement">element</span> </div> <table> <tr> <td>First row First TD</td> <td><span class="myelement">element</span> </td> <td></td> </tr> <tr> <td>Second row First TD</td> <td><span class="myelement">element</span> </td> <td></td> </tr> </table> 

Answer 2

why do you want it in a single line? just split it to two, it will be simpler.

$('.myelement').closest('#container').addClass('red-border');
$('.myelement').closest('tr').find('td').addClass('red-border');

by the way, you called #myelement when your tag had a class myelement . It should be called using .myelement . And the container is an id so #container

Answer 3

According to your structure you can go for this:

$(".myelement").parents("#container").addClass('red-border').siblings("table").find("tr").eq(0).children().addClass('red-border');

target the parent #container using parents() . This will give nothing for the span inside td . Then target its sibling table and the first tr by using eq(0) .

Answer 4

Call class element using .myelement instead of #myelement

$('.myelement').closest('.container, tr td').css({"color": "red", "border": "2px solid red"});

or

$('.myelement').closest('.container, tr td').addClass('red-border');