HTML <img> class Attribute

The class attribute on an <img> tag assigns one or more classnames to the image. Classes are used to style elements. Classnames are defined in a stylesheet or in a local <style> element.

Example

#

A class attribute styling an <img> element.

Van Gogh, Self-portrait.
<style>
  .image {border:4px solid #1b6b6f; padding:15px;}
</style>

<img class="image"
     src="/img/html/vangogh-lg.jpg"
     alt="Van Gogh, Self-portrait.">

Using class

The class attribute assigns one or more classnames to the <img> tag.

Multiple classnames are separated by a space.

Classes (i.e. classnames) are used for styling the img element.

JavaScript uses classes to access one or more elements by classname.

Tip:  class is a global attribute that can be applied to any HTML element.


Syntax

<img class="classnames">

Values

#

Value Description
classnames One or more space-separated class names.

More Examples

A class attribute styling an <img> element.
Clicking the button toggles a classname that changes the border radius.

Van Gogh, Self Portrait.

<style>
  .image {border:4px solid #1b6b6f; padding:15px;}
  .image-rounded { border-radius: 50px; }
</style>

<img id="myimg" class="image"
     src="/img/html/vangogh-lg.jpg"
     alt="Van Gogh, Self Portrait.">

<br/><br/>
<button onclick="toggle();">Toggle class</button>

<script>
  let toggle = () => {
    let element = document.getElementById("myimg");
    element.classList.toggle("image-rounded");
  }
</script>

Code explanation

Two CSS classes are defined in the <style> element.

The class attribute in <img> assigns a single classname.

Repeatedly clicking the button toggles the second class, changing the <img> border radius.


Browser support

Here is when class support started for each browser:

Chrome
1.0 Sep 2008
Firefox
1.0 Sep 2002
IE/Edge
1.0 Aug 1995
Opera
1.0 Jan 2006
Safari
1.0 Jan 2003

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