Live preview is a feature of MediaWiki which allows showing a preview of an article or section on an edit form without reloading the remaining HTML code of the form.
It has some bugs, see live preview tracking bug for an up to date list.
Enabling live preview
Live preview is on or off depending on a setting in the "editing" tab of your user preferences page, by default off.
- less incoming traffic: wikicode and all the menus are not received from the server again
- faster response time
- same cursor position in the editing window.
Only preview area is updated, which means:
- scripts are not executed if they do not use the
- some parts of the interface like interlanguage links, transclusion list etc might not be updated correctly.