Page "Web browser engine" Paragraph 1

A web browser engine, ( sometimes called layout engine or rendering engine ), is a software component that takes marked up content ( such as HTML, XML, image files, etc.

) and formatting information ( such as CSS, XSL, etc.

) and displays the formatted content on the screen.

It " paints " on the content area of a window, which is displayed on a monitor or a printer.

A web browser engine is typically embedded in web browsers, e-mail clients, on-line help systems or other applications that require the displaying ( and editing ) of web content.

Engines may wait for all data to be received before rendering a page, or may begin rendering before all data is received.

This can result in pages changing as more data is received, such as images being filled in or a flash of unstyled content if rendering begins before formatting information is received.