HTML <sub> <sup> Tags
Example
Subscript and superscript text:<p>This text contains <sub>subscript</sub> text.</p> <p>This text contains <sup>superscript</sup> text.</p>
Definition and Usage
The <sub> tag defines subscript text. Subscript text appears half a character below the baseline. Subscript text can be used for chemical formulas, like H2O.
The <sup> tag defines superscript text. Superscript text appears half a character above the baseline. Superscript text can be used for footnotes, like WWW[1].
Browser Support
The
<sub> <sup> tags are supported in all major browsersDifferences Between HTML and XHTML
NONEStandard Attributes
Теги<sub> <sup> поддерживают следующие стандартные атрибуты:| Attribute | Value | Description | DTD |
|---|---|---|---|
| class | classname | Specifies a classname for an element | STF |
| dir | rtl ltr | Specifies the text direction for the content in an element | STF |
| id | id | Specifies a unique id for an element | STF |
| lang | language_code | Specifies a language code for the content in an element | STF |
| style | style_definition | Specifies an inline style for an element | STF |
| title | text | Specifies extra information about an element | STF |
| xml:lang | language_code | Specifies a language code for the content in an element, in XHTML documents | STF |
More information about Standard Attributes.
Event Attributes
The<sub> <sup> tags support the following event attributes:| Attribute | Value | Description | DTD |
|---|---|---|---|
| onclick | script | Script to be run on a mouse click | STF |
| ondblclick | script | Script to be run on a mouse double-click | STF |
| onmousedown | script | Script to be run when mouse button is pressed | STF |
| onmousemove | script | Script to be run when mouse pointer moves | STF |
| onmouseout | script | Script to be run when mouse pointer moves out of an element | STF |
| onmouseover | script | Script to be run when mouse pointer moves over an element | STF |
| onmouseup | script | Script to be run when mouse button is released | STF |
| onkeydown | script | Script to be run when a key is pressed | STF |
| onkeypress | script | Script to be run when a key is pressed and released | STF |
| onkeyup | script | Script to be run when a key is released | STF |
More information about Event Attributes.
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