Scripting

GeoGebra supports two scripting languages -- GGBScript and Javascript. Script is a sequence of actions which can be triggered by

• clicking or updating particular object
• loading the file (in case of Javascript)
• Javascript listeners (see Reference:JavaScript)

You can set this script via Scripting panel of Properties Dialog.

GGBScript

You can create scripts consisting of GeoGebra commands.

Example:

• a is an integer-valued slider
• <code>list1={"red","green","blue"}</code>
• in properties of a set On Update script to SetCaption[a,Element[list1,a]
• by moving the slider you change its color

JavaScript

JavaScript is a programming language used by many internet technologies. Unlike GGB Script, in Javascript the commands don't have to be executed as a simple sequence, but a control flow (if, while, for) can be used. For generic JavaScript you can find a nice tutorial on w3schools.com. In GeoGebra, you can use special JavaScript commands which allow you to change the construction.

Example:

Complete list of available commands can be found in Reference:JavaScript. GeoGebra contains its own JavaScript engine. When exported as Dynamic Worksheet one can chose whether to use this engine or the one contained in browser in applets.