The class attribute assigns one or more classnames to the <object> 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 embedded <object> element.
<style>
.object-border { border: 5px solid #4238ca; padding:5px; width:100%;height:550px;}
</style>
<object class="object-border" data="/media/sample.pdf" type="application/pdf">
Object element is not supported.
</object>
Classes (i.e. classnames) are used for styling the object 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.
<object class="classnames">
| Value | Description |
|---|---|
| classnames | One or more space-separated class names. |
A class attribute styling an embedded <object> element.
Clicking the button toggles a classname that changes the border color.
<style>
.object-indigo { border: 5px solid #4238ca; padding:5px; width:100%;height:550px; }
.border-rose { border-color: #f87171; }
</style>
<object id="myobject" class="object-indigo"
data="/media/sample.pdf" type="application/pdf">
Object element is not supported.
</object>
<br /><br />
<button onclick="toggle();">Toggle class</button>
<script>
let toggle = () => {
let element = document.getElementById("myobject");
element.classList.toggle("border-rose");
}
</script>
Two CSS classes are defined in the <style> element.
The class attribute in <object> assigns one classname.
Repeatedly clicking the button toggles another class, changing the color of the <object> border.
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 <object>
