A style attribute on a <sub> tag assigns a unique style to the element.
Its value is CSS that defines the appearance of the sub element.
A style attribute on a <sub> tag.
The formula for water is H2O.
<p>
The formula for water is
H<sub style="color:red;font-weight:bold;">2</sub>O.
</p>
The style attribute specifies the style, i.e. look and feel, of the <sub> 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 <sub> element only.
<sub style="CSS-styles">
| Value | Description |
|---|---|
| CSS-styles | One or more CSS property/value pairs separated by semicolons (;). |
A style attribute on a <sub> tag.
Clicking the button toggles the text color.
The formula for water is H2O.
<p>
The formula for water is
H<sub id="mysub" style="color:red; font-weight:bold;">2</sub>O.
</p>
<br />
<button onclick="toggle();">Toggle style</button>
<script>
let toggle = () => {
let element = document.getElementById("mysub");
if (element.style.color === "red") {
element.style.color = "teal";
} else {
element.style.color = "red";
}
}
</script>
The style attribute assigns a text color to the <sub> 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 <sub>
