当单击一个复选框时，使用jQuery将类添加到包含li

Question

Objective

Highlight (by adding a background-color to) the "row" <li> if a (nested) checkbox inside that row is clicked.

Background

In this feature I am working on the interface for a file management system. When a user clicks the checkbox they can then delete all the files checked. to give them visual feedback, i want all of their selected files to have a background color. This will be done by clicking a checkbox, then i want the <li> to be colored.

Current state

I found various helpful answers on stackoverflow but have a gap in knowledge and trying to fill that in. Most answers use the parent element. But that only helps me by coloring that specific parent that holds the checkbox.

Code

I have this demo on codepen

jQuery

$("#this-list :checkbox").on('click', function(){
    $(this).parent().toggleClass("checked");
});

CSS

.checked {
    background: red;
}

HTML

<div class="container">
    <ul id="this-list">

        <li>
            <div class="row">
                <div class="col-md-2">
                    <input type="checkbox" />
                    song.mp3
                </div>
                <div class="col-md-2">
                    2011
                </div>
                <div class="col-md-2">
                    1 gb
                </div>
                <div class="col-md-2">
                    2 min
                </div>
            </div>
        </li>

    <!-- More <li>s -->
    </ul>
</div>

Answer 1

you could use closest to get the closest checkboxs li element:

$("#this-list :checkbox").on('click', function(){
    $(this).closest('li').toggleClass("checked");
});

this method will bubble up the DOM starting from the checkbox until it finds a match for the given selector ( li in this case).

Answer 2

Use .parents([selector])

For the li you want this

$(this).parents('li').toggleClass("checked");

Or if you only want the row highlighted

$(this).parents('.row').toggleClass("checked");

Or if you only want the cell highlighted

$(this).parents('.col-md-2').toggleClass("checked");

Answer 3

You are very close! You can use the .parents() method of jQuery and pass in the class .row. It would look like this:

$("#this-list :checkbox").on('click', function(){
    $(this).parents(".row").toggleClass("checked");
});

EDIT:

As @showdev mentioned, if you want the li element, you can just do:

$(this).parents("li").toggleClass("checked"); 

Answer 4

As in this Codepen

$("#this-list :checkbox").on('click', function(){
    $(this).closest("li").toggleClass("checked");
});

Alternatively, since the checkbox is contained inside a div which is inside the target li you can use: Codepen

$("#this-list :checkbox").on('click', function(){
   $(this).parent().parent().toggleClass("checked");
});

Answer 5

Simply add another .parent() to add the checked class to the row (the parent of the parent):

$(this).parent().parent().toggleClass("checked");

See this CodePen fork .