Jquery find element by data attribute value

Deep diving with .find()

The .find() function in jQuery comes to the rescue when you need to navigate through child elements of a specific component. Here are some highlights:

• Performance: When applied on a jQuery object that’s been fine-tuned to a smaller selection, .find() is turbocharged.
• Adaptive filtering: Enables the incorporation of variables directly in the selector via template literals, while also removing the risk of quoting mishaps.

Yours truly, jQuery’s .find() function – every descendant's nightmare!

let value = "0";
$('.slider').find(`[data-slide="${value}"]`).addClass('active');
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This line of code dynamically targets elements based on different data attribute values, giving versatility to your programming.

A slice of template literals

Template literals spruce up your code's clarity and sustainability. They permit the use of variables directly within selectors, offering a more streamlined syntax for dynamic cases.

let category = "action";
$(`.movies[data-genre="${category}"]`).addClass('highlight');
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Thanks to the variable category, we can switch genres dynamically without modifying the entire selector - promoting flexible, recyclable code.

Two's company

There could be situations where you need to filter using more than one data attribute. Chain attribute selectors will let you do this:

$("[data-id='42'][data-status='active']").css('background-color', 'green');
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This chain selector picks elements featuring data-id="42" and data-status="active", setting their background color to forest green. You now have the precision to style or manipulate particular groups of elements.

The return of the parent

On occasions, you need to encapsulate the initial selection with the elements found. For this, jQuery proffers .andSelf(), which though deprecated now favors .addBack().

$('.parent').find('.child').andSelf().addClass('highlighted');
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This snippet bestows the .highlighted class to both .parent and all .child elements. This manner spectrum inclusion calls for seamless manipulation of the container and its content.