HTML <picture> class Attribute

HTML <param>

HTML <pre>

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

Classnames are defined in a stylesheet or in a local <style> element.

Classes, i.e. classnames, are used to style elements.

Example

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A class attribute styling a <picture> element.

<style>
  .picture { border: 3px solid teal;padding: 10px; display:inline-block; }
</style>

<picture class="picture">
  <source media="(max-width: 520px)" srcset="/img/html/vangogh-sm.jpg">
  <source media="(max-width: 768px)" srcset="/img/html/vangogh.jpg">
  <img src="/img/html/vangogh-lg.jpg" alt="Vincent Van Gogh">
</picture>

Using class

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

Syntax

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<picture class="classnames">

Values

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

More Examples

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A class attribute styling a <picture> element.
Clicking the button toggles a classname that adds a box shadow.

<style>
  .picture-bordered {border:3px solid teal;padding:10px;display:inline-block;}
  .picture-shadowed {box-shadow: 0 0 15px 2px rgba(0,0,0,0.5);}
</style>

<picture id="mypicture" class="picture-bordered">
  <source media="(max-width: 520px)" srcset="/img/html/vangogh-sm.jpg">
  <source media="(max-width: 768px)" srcset="/img/html/vangogh.jpg">
  <img src="/img/html/vangogh-lg.jpg" alt="Vincent Van Gogh">
</picture>

<br /><br />
<button onclick="toggle();">Toggle class</button>

<script>
  let toggle = () => {
    let element = document.getElementById("mypicture");
    element.classList.toggle("picture-shadowed");
  }
</script>

Code explanation

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

The class attribute in <picture> assigns one classname.

Repeatedly clicking the button toggles the second class, adding box shadow to the <picture>.

Browser support

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Here is when class support started for each browser: