The class attribute assigns one or more classnames to the <img> tag.
Classnames are defined in a stylesheet or in a local <style> element.
Classes, i.e. classnames, are used to style elements.
A class attribute styling an <img> element.
<style>
.image {border:4px solid #1b6b6f; padding:15px;}
</style>
<img class="image"
src="/img/html/vangogh-lg.jpg"
alt="Van Gogh, Self-portrait.">
Classes (i.e. classnames) are used for styling the img element.
Multiple classnames are separated by a space.
JavaScript uses classes to access elements by classname.
Tip: class is a global attribute that can be applied to any HTML element.
<img class="classnames">
| Value | Description |
|---|---|
| classnames | One or more space-separated class names. |
A class attribute styling an <img> element.
Clicking the button toggles a classname that changes the border radius.
<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>
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.
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 |
Back to <img>
