The class attribute assigns one or more classnames to the <label> 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 a <label> element.
<style>
.label {color:#4238ca; font-weight:bold;}
</style>
<form>
<label for="firstname" class="label">First name</label>
<input type="text" id="firstname" name="firstname">
</form>
Classes (i.e. classnames) are used for styling the label 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.
<label class="classnames">
| Value | Description |
|---|---|
| classnames | One or more space-separated class names. |
A class attribute styling a <label> element.
Clicking the button toggles a classname that changes the text color.
<style>
.indigo {color:#4238ca; font-weight:bold;}
.teal {color:#258e94;}
</style>
<form>
<label for="firstname" id="mylabel" class="indigo">First Name</label>
<input type="text" id="firstname" name="firstname">
</form>
<br />
<button onclick="toggle();">Toggle class</button>
<script>
let toggle = () => {
let element = document.getElementById("mylabel");
element.classList.toggle("teal");
}
</script>
Two CSS classes are defined in the <style> element.
The class attribute in <label> assigns one class.
Repeatedly clicking the button toggles another class, changing the boldness of the <label>.
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 <label>
