A drop-down list (abbreviated drop-down, or DDL;[1] also known as a drop-down menu, drop menu, pull-down list, picklist) is a graphical control element, similar to a list box, that allows the user to choose one value from a list either by clicking or hovering over the menu. When a drop-down list is inactive, it displays a single value. When activated, it displays (drops down) a list of values, from which the user may select one. When the user selects a new value, the control reverts to its inactive state, displaying the selected value. It is often used in the design of graphical user interfaces, including web design.
Terminology
[edit]![](https://upload.wikimedia.org/wikipedia/commons/thumb/c/cc/Dewiki-suggesting-searchplugin.png/220px-Dewiki-suggesting-searchplugin.png)
This type of control is called a "pop-up menu" on the Macintosh platform;[2] however, the term "pop-up menu" is used to refer to context menus in other GUI systems. The Macintosh also has the notion of "pull-down menus". The distinction is that, when the menu is closed, a pop-up menu's title shows the last-selected item while a pull-down menu shows a static title like a menu in the menu bar. Thus, the uses are different—pop-up menus are used to select a single option from a list while pull-down menus are used to issue commands or in cases where multiple options can be selected.
HTML
[edit]In web forms, the HTML elements <select>
and <option>
are used to display a drop-down menu:[3]
<select>
<option>option1</option>
<option>option2</option>
<option>option3</option>
</select>
See also
[edit]References
[edit]- ^ "DDL stands for Drop-Down List (user interface)". Acronymfinder.
- ^ "Managing Pop-Up Buttons and Pull-Down Lists". Application Menu and Pop-up List Programming Topics. Mac Development Library. June 26, 2007. Retrieved May 15, 2013.
- ^ "The SELECT, OPTGROUP, and OPTION elements". W3C.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
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