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cssaddclass
Filippo oretti
Filippo oretti

Reputation: 49813

How do I add a new class to an element dynamically?

Is there any way to add a new CSS class to an element on :hover?

Like for jQuery, but translated into CSS:

$(element).addClass('someclass');

Upvotes: 30

Views: 140960

Answers (7)

Eran W
Eran W

Reputation: 1776

Yes you can - first capture the event using onmouseover, then set the class name using Element.className.

If you like to add or remove classes - use the more convenient Element.classList method.

.active {
  background: red;
}
<div onmouseover=className="active">
  Hover this!
</div>

Upvotes: 0

Rene Koch
Rene Koch

Reputation: 1291

Short answer no :)

But you could just use the same CSS for the hover like so:

a:hover, .hoverclass {
    background:red;
}

Maybe if you explain why you need the class added, there may be a better solution?

Upvotes: 34

Nate
Nate

Reputation: 6464

Since everyone has given you jQuery/JS answers to this, I will provide an additional solution. The answer to your question is still no, but using LESS (a CSS Pre-processor) you can do this easily.

.first-class {
  background-color: yellow;
}
.second-class:hover {
  .first-class;
}

Quite simply, any time you hover over .second-class it will give it all the properties of .first-class. Note that it won't add the class permanently, just on hover. You can learn more about LESS here: Getting Started with LESS

Here is a SASS way to do it as well:

.first-class {
  background-color: yellow;
}
.second-class {
  &:hover {
    @extend .first-class;
  }
}

Upvotes: 24

user3972776
user3972776

Reputation:

why @Marco Berrocl get a negative feedback and his answer is totally right what about using a library to make some animation so i need to call the class in hover to element not copy the code from the library and this will make me slow.

so i think hover not the answer and he should use jquery or javascript in many cases

Upvotes: 1

nathan
nathan

Reputation: 5506

:hover is a pseudoclass, so you can put your CSS declarations there:

a:hover {
    color: #f00;
}

You can also use a list of selectors to apply CSS declarations to a hovered element or an element with a certain class:

.some-class,
a:hover {
    color: #f00;
}

Upvotes: 3

Fluidbyte
Fluidbyte

Reputation: 5210

CSS really doesn't have the ability to modify an object in the same manner as JavaScript, so in short - no.

Upvotes: 7

Marco Berrocal
Marco Berrocal

Reputation: 362

Using CSS only, no. You need to use jQuery to add it.

Upvotes: -2

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