Sound capabilities
For example, the AIR file API includes
a File class, contained in the flash.filesystem package. You can
create a File object in JavaScript as follows:
var myFile = new window.runtime.flash.filesystem.File();
The
runtime
object
is a special JavaScript object, available to HTML content running
in AIR in the application sandbox. It lets you access runtime classes from
JavaScript. The
flash
property of the
runtime
object
provides access to the flash package. In turn, the
flash.filesystem
property
of the
runtime
object provides access to the flash.filesystem
package (and this package includes the File class). Packages are
a way of organizing classes used in ActionScript.
Note:
The
runtime
property is not automatically
added to the window objects of pages loaded in a frame or iframe.
However, as long as the child document is in the application sandbox,
the child can access the
runtime
property of the parent.
Because the package structure of the runtime
classes would require developers to type long strings of JavaScript
code strings to access each class (as in
window.runtime.flash.desktop.NativeApplication
),
the AIR SDK includes an AIRAliases.js file that lets you access
runtime classes much more easily (for instance, by simply typing
air.NativeApplication
).
The AIR API classes are discussed throughout
this guide. Other classes from the Flash Player API, which may be
of interest to HTML developers, are described in the
Adobe AIR API Reference for HTML Developers
.
ActionScript is the language used in SWF (Flash Player) content.
However, JavaScript and ActionScript syntax are similar. (They are
both based on versions of the ECMAScript language.) All built-in
classes are available in both JavaScript (in HTML content) and ActionScript
(in SWF content).
Note:
JavaScript code cannot use the Dictionary,
XML, and XMLList classes, which are available in ActionScript.
