Has Child With Class Css

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by

Vector Linux
in

Today, I want to talk about an incredibly useful CSS selector – the “has child with class” selector. As a web developer, I’ve found this selector to be a game-changer when it comes to styling and targeting specific elements on a web page.

First, let’s understand what the “has child with class” selector does. It allows us to select an element based on whether it has a specific child element with a particular class. This is especially handy when we want to apply styles or behavior to a parent element only if it contains a specific child element.

Let’s take a look at an example to better understand how this selector works:


<div class="parent">
<div class="child">I am a child element</div>
</div>

In the above HTML structure, we have a parent `

` with a child `

` inside it. Now, let’s say we want to apply a different background color to the parent `

` only if it contains a child `

` with the class “child”.

With the “has child with class” selector, we can achieve this easily:


.parent:has(.child) {
background-color: yellow;
}

By using the “:has()” pseudo-class selector along with the child class name, we can apply a yellow background color to the parent `

` only if it contains a child `

` with the class “child”.

Now, let’s dive deeper into why this selector is so useful. One common use case is when we have a list of items and we want to highlight the parent item when it contains a certain child element. For example, consider a blog post where we want to highlight the parent article `

` when it contains a specific section with the class “highlight”.

By using the “has child with class” selector, we can easily achieve this effect:


.article:has(.highlight) {
border: 2px solid red;
}

With this CSS rule, whenever an article `

` contains a section with the class “highlight”, it will have a red border applied to it. This can help draw attention to important sections within the article and enhance the overall user experience.

Another scenario where the “has child with class” selector can be handy is when we want to apply styles to a specific parent element based on the presence of multiple child elements with different classes. For instance, imagine you have a form with multiple input fields, and you want to highlight the parent `

` when both a username input field with the class “username” and a password input field with the class “password” are present.

By combining the “has child with class” selector with multiple classes, we can achieve this effect:


.form:has(.username, .password) {
box-shadow: 0 0 5px rgb(42, 120, 211);
}

In this example, the parent `

` with the class “form” will have a box shadow applied to it whenever it contains both an input field with the class “username” and an input field with the class “password”. This can be useful for providing visual feedback to users and indicating that they have filled out the necessary fields.

Conclusion

The “has child with class” selector is an incredibly powerful tool in a web developer’s toolbox. It allows us to target specific parent elements based on the presence of child elements with specific classes. This can be particularly useful for highlighting, styling, and applying behavior to specific sections of a web page.

Whether you want to highlight parent items in a list, style certain sections within an article, or apply styles to form elements based on input field classes, the “has child with class” selector can make your CSS code more efficient and maintainable.

Next time you find yourself in need of selecting parent elements based on their child elements, give the “has child with class” selector a try. It might just save you time and make your life as a web developer a little bit easier.