Finding the Closest Element with jQuery's .closest() Method

I'm facing an issue while trying to select an element that is positioned above another element. Specifically, I want to target the nearest occurrence of the .discount-dropdown class that appears above the .discount-type class. Can anyone help me figure out what mistake I might be making?

Here's an example of the HTML code (multiple instances):

<div class="input-group-btn">
    <button type="button" class="btn btn-default dropdown-toggle discount-dropdown" data-toggle="dropdown" aria-expanded="false">$ <span class="caret"></span></button>
    <ul class="dropdown-menu dropdown-menu-right adjustment-dropdown" role="menu">
        <li><a class="discount-type">$</a></li>
        <li><a class="discount-type">%</a></li>
    </ul>
</div>

And here's the corresponding jQuery code:

$('.discount-type').on('click', function(event){
    $sign = $(this).html().substr(0,1);
    $parentElement = $(this).closest('.discount-dropdown').html(); //unsure why this isn't functioning
    $newHtml = $sign + $parentElement.substr(1);
    alert($newHtml);
});

Answer №1

because the button isn't a parent of the list item (li).

$('.discount-type').on('click', function(event){
    $sign = $(this).html().substr(0,1);
    $parentElement = $(this).closest('ul').prev('.discount-dropdown').html(); //this isn't working
    $newHtml = $sign + $parentElement.substr(1);
    alert($newHtml);
});

I recommend making some modifications in the way you update the currency:

$('.discount-type').on('click', function(event) {
  var sign = $(this).html().substr(0, 1);
  $(this).closest('ul').prev('.discount-dropdown').find('.currency').text(sign)
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div class="input-group-btn">
  <button type="button" class="btn btn-default dropdown-toggle discount-dropdown" data-toggle="dropdown" aria-expanded="false"><span class="currency">$</span> <span class="caret"></span></button>
  <ul class="dropdown-menu dropdown-menu-right adjustment-dropdown" role="menu">
    <li><a class="discount-type">$</a></li>
    <li><a class="discount-type">%</a></li>
  </ul>
</div>

Answer №2

Using the closest function, you can search for the closest parent that meets the given criteria. In this case, your button is not a parent of your element, but by using closest, you can find the parent for both your elements - discount-type and the button. With access to the parent, you will be able to locate the button.

$buttonElement = $(this).closest('.input-group-btn').find('.discount-dropdown').html();
  • The input-group-btn serves as the parent for both elements
  • The discount-dropdown is a child element of the input-group-btn

Answer №3

Give this a try!

$('.promo-type').on('click', function(event){
    $symbol = $(this).html().substr(0,1);
    $grandparent = $(this).parent().parent().parent().find('.promo-dropdown').html(); //this code is functioning properly
    $newHtml = $symbol + $grandparent.substr(1);
    alert($newHtml);
});

Test it out now!

Answer №4

A better alternative to using closest('ul') is to utilize closest('.offer-list') instead. An alternate approach would be combining parentsUntil with parent.

$(this).parentsUntil('.offer-list').parent().html();

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