Presto is a layout engine for the Opera web browser developed by Opera Software. After several public betas and technical previews, it was released on January 28, 2003 in Opera 7.0 for Windows; it is the browser's current layout engine. Presto replaced the Elektra engine used in versions 4–6 of Opera. Unlike Elektra, Presto is dynamic: the page or parts of it can be re-rendered in response to DOM and script events. Presto is available only as a part of Opera browser or related products. The source or binary (DLL) forms of the engine are not publicly available. Subsequent releases have seen a number of bugs fixed and optimisations to improve the speed of the ECMAScript ("JavaScript") engine.

JavaScript engines

Two JavaScript engines are used in combination with Presto. The "linear_b" engine is used in versions based on the "Core" fork of Presto, Opera 7.0 through 9.27.^[1] The "futhark" engine is used in versions based on the "Core 2" fork of Presto, Opera 9.5 and will be used in Opera 10.^[2]

Presto-based applications

Web browsers

• Opera 7 and above
• Opera Mobile
• Opera Mini
• Nintendo DS Browser (based on Opera)
• Nokia 770 Browser (based on Opera)
• Sony Mylo's Browser (based on Opera)
• Wii Internet Channel Browser (based on Opera)

HTML editors

• Macromedia Dreamweaver MX and above
• Adobe Creative Suite 2
• Adobe Creative Suite 3^[3]

See also

• List of layout engines
• Comparison of layout engines

References

cs:Presto de:Presto es:Presto (motor de navegación) fr:Presto (moteur de rendu HTML) it:Presto (motore di rendering) hu:Presto (böngész?motor) ja:Presto pl:Presto (silnik przegl?darki) pt:Presto (motor de layout) ru:Presto (Opera) zh:Presto