Many of Matisse's paintings from 1898 to 1901 make use of a Divisionist technique. Divisionism is a paint style that is defined by the separation of colors into individual dots which interact optically.
The class attribute assigns one or more classnames to the <em> 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 <em> element.
Many of Matisse's paintings from 1898 to 1901 make use of a Divisionist technique. Divisionism is a paint style that is defined by the separation of colors into individual dots which interact optically.
<style>
.text-em { font-weight: bold; color: teal; }
</style>
<article>
<p>
Many of Matisse's paintings from 1898 to 1901 make use
of a <em class="text-em">Divisionist</em> technique.
Divisionism is a paint style that is defined by the separation
of colors into individual dots which interact optically.
</p>
</article>
Classes (i.e. classnames) are used for styling the em 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.
<em class="classnames">
| Value | Description |
|---|---|
| classnames | One or more space-separated class names. |
A class attribute styling an <em> element.
Clicking the button toggles a classname that adds a text underline.
Many of Matisse's paintings from 1898 to 1901 make use of a Divisionist technique. Divisionism is a paint style that is defined by the separation of colors into individual dots which interact optically.
<style>
.em-teal { font-weight: bold; color: teal; }
.em-underline { text-decoration: underline; }
</style>
<article>
<p>
Many of Matisse's paintings from 1898 to 1901 make use
of a <em id="myem" class="em-teal">Divisionist</em> technique.
Divisionism is a paint style that is defined by the separation
of colors into individual dots which interact optically.
</p>
</article>
<button onclick="toggle();">Toggle class</button>
<script>
let toggle = () => {
let element = document.getElementById("myem");
element.classList.toggle("em-underline");
}
</script>
Two CSS classes are defined in the <style> element.
The class attribute in the <em> tag assigns one classname.
Clicking the button toggles another class which changes the element's text underline.
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 <em>
