What is HTML <dfn> tag ?
HTML <dfn> tag also called as HTML definition tag.
HTML <dfn> tag represents the term which is defined within context of definition phrase or sentence in an HTML document.
HTML <dfn> tag have an opening and closing <dfn></dfn> tags.
Why HTML <dfn> tag is used ?
Whenever there is need to show definitions for particular term inside the webpage <dfn> tag is used.
How HTML <dfn> tag works ?
HTML <dfn> tag is used for representing a defining instance in HTML.
Defining instance is the first use of a term in a document.
Whatever term/text is present within the <dfn> element, the browser understands that nearby text is the definition of the term.
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Syntax :
<dfn>Some Title : </dfn>Description for the title<br/>
Example :
<!DOCTYPE html>
<html>
<head>
<title>HTML dfn tag</title>
</head>
<body>
<p>
<dfn>Centre of gravity : </dfn>It is the point on an object through which the entire weight of the object may be considered to act.<br/>
<dfn>Pressure : </dfn>Its a force acting per unit area.<br/>
<dfn>Power : </dfn>Its defined as the rate of work done or energy converted with respect to time.<br/>
<dfn>Rarefaction : </dfn>Its a region where the particles are further apart.<br/>
<dfn>Damping : </dfn>Its the process whereby energy is taken from the oscillating system.<br/>
</p>
</body>
</html>
Output :
<dfn> Tag Attributes
HTML <dfn> tag does not support any specific attributes.
Global Attributes
HTML <dfn> tag support following global attributes.
| Sno | Attributes | Value | Description |
|---|---|---|---|
| 1 | id | unique_name | Declared unique id for an element. |
| 2 | class | class_name | Declared one or more classnames for an element. |
| 3 | style | styles | CSS inline styles specify an element. |
| 4 | title | title | Specify extra details of element contain, this will display as a “tooltip” for an elements. |
Event Attributes
HTML <dfn> tag support following event attributes.
| Sno | Attributes | Value | Description |
|---|---|---|---|
| 1 | onfocus | script | element gets focus on object when script tobe run. |
| 2 | onblur | script | element lose the focus on object when scrip tobe run. |
| 3 | onabort | script | element gets aborted on object when script tobe run. |
| 4 | onchange | script | element gets anytime change on object when script tobe run. |
| 5 | onbeforeunload | script | element gets unloaded on object when scrip tobe run. |
| 6 | onclick | script | clicked on object when script tobe run. |
| 7 | ondblclick | script | double click on object when script tobe run. |
| 8 | onkeydown | script | key is pressed when script tobe run. |
| 9 | onkeypress | script | key is pressed over element then released when script tobe run. |
| 10 | onkeyup | script | key is released over element when script tobe run. |
| 11 | onmousedown | script | mouse button was pressed over an element when script tobe run. |
| 12 | onmouseout | script | mouse pointer release over an element when script tobe run. |
| 13 | onmousemove | script | run mouse pointer moved when script tobe run. |
| 14 | onmouseover | script | run mouse pointer move over when script tobe run. |
| 15 | onmouseup | script | mouse button is released when script tobe run. |
| 16 | onreset | script | form has been reset when script tobe run. |
| 17 | onselect | script | Select some content when script tobe run. |
| 18 | onsubmit | script | form has been submitted when script tobe run. |
| 19 | onload | script | object has load when script tobe run. |
| 20 | onchange | script | allow to change the object when script tobe run. |
| 21 | onunload | script | unload to the browser window when script tobe run. |
| 22 | ondrag | script | element being dragged when script tobe run. |
| 23 | ondragend | script | element being stop dragged when script tobe run. |
| 24 | ondragenter | script | element being go target dragged when script tobe run. |
| 25 | ondragleave | script | element being leave to target dragged when script tobe run. |
| 26 | ondragover | script | element being over to target dragged when script tobe run. |
| 27 | ondragstart | script | element being start dragged when script tobe run. |
| 28 | ondrop | script | element being dropped when script tobe run. |
| 29 | onerror | script | element error occurs when script tobe run. |
| 30 | onmessage | script | element message display when script tobe run. |
| 31 | onerror | script | element error occurs when script tobe run. |
| 32 | onmousewheel | script | mouse wheel will be rotate when script tobe run. |
| 33 | onscroll | script | scrollbar is scroll when script tobe run. |
| 34 | onresize | script | element should be resize when script tobe run. |
| 35 | onselect | script | all element content selected when script tobe run. |
| 36 | onstorage | script | element should be store in target when script tobe run. |
Browser Compatibility
| Sno | Browser | Support |
| 1 | Chrome | Yes |
| 2 | Firefox | Yes |
| 3 | Edge | Yes |
| 4 | Opera | Yes |
| 5 | Safari | Yes |
| 6 | Internet Explorer | Yes |