A style attribute on an <optgroup> tag assigns a unique style to the option group.
Its value is CSS that defines the appearance of the option group.
A style attribute on an <optgroup> element.
<select>
<option value="">-- Select city -- </option>
<optgroup label="Europe" style="color: teal; font-size: 16px;">
<option value="stockholm">Stockholm</option>
<option value="barcelona">Barcelona</option>
<option value="athens">Athens</option>
</optgroup>
</select>
The style attribute specifies the style, i.e. look and feel, of the <optgroup> element.
A style contains any number of CSS property/value pairs, separated by semicolons (;).
The style attribute overrides any other style that was defined in a <style> tag or an external CSS file.
This inline styling affects the current <optgroup> element only.
<optgroup style="CSS-styles">
| Value | Description |
|---|---|
| CSS-styles | One or more CSS property/value pairs separated by semicolons (;). |
A style attribute on an <optgroup> element.
Clicking the button toggles the font color of the option group.
<select>
<option value="">-- Select city -- </option>
<optgroup id="myoptgroup" label="Europe" style="color: teal; font-size: 16px;">
<option value="stockholm">Stockholm</option>
<option value="barcelona">Barcelona</option>
<option value="athens">Athens</option>
</optgroup>
</select>
<br />
<button onclick="toggle();">Toggle style</button>
<script>
let toggle = () => {
let element = document.getElementById("myoptgroup");
if (element.style.color === "teal") {
element.style.color = "tomato";
} else {
element.style.color = "teal";
}
}
</script>
The style attribute assigns a text color and size to the <optgroup> element.
Clicking the button calls JavaScript which toggles the text color to another color.
Here is when style 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 <optgroup>
