Presto (layout engine)

Presto was the layout engine of the Opera web browser for a decade.

Description

It was released on 28 January 2003 in Opera 7, and later used to power the Opera Mini and Opera Mobile browsers.

As of Opera 15, the desktop browser uses a Chromium backend, replacing Presto with the Blink layout engine.

Presto is a dynamic engine. Webpages can be re-rendered completely or partially in response to DOM events.

Its releases saw a number of bug fixes and optimizations to improve the speed of the ECMAScript (JavaScript) engine.

It is proprietary software only available as a part of the Opera browsers.