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revBrowserOpen(windowId [, url ] )

XBrowser_Open windowId [, url ]

Platform Support
Mac OS X,Windows
Opens and initialises a new browser

local tBrowserId
put revBrowserOpen(the windowId of this stack, "") into tBrowserId
if tBrowserId is not an integer then
answer "Failed to open browser"
end if
-- Using the old XBrowser syntax
XBrowser_Open the windowId of this stack, ""
put the result into tBrowserId

Additional Comments
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The revBrowserOpen function opens a new browser in the window with the given windowId. If a url is given, the new browser immediately navigates to this url.


The windowId is the operating system's ID for a stack window as given in the windowID property.

The url is any url that can be accessed by the browser object in use.


The revBrowserOpen function returns a value. If successful this will be an integer browser instance id, if unsuccessful, the result will be empty.

Cross-platform note: On Windows systems, the Internet Explorer browser is used by the revBrowserOpen function while on OS X Systems the Safari browser is used. To ensure cross-platform compatibility, don't use features that are not supported by both browsers, eg "ftp://" urls, which are only supported by Internet Explorer.

It is no longer necessary to initialise the Browser using XBrowser_Init, and this command now does nothing, but is still included to prevent legacy code causing script errors.

There is a sample stack for revBrowser at the following location in the Revolution folder: Resources/Examples/Browser Samper.rev. This stack demonstrates, with many examples, how to use browser objects in an application.

General Notes on Using the Browser Library

The older XBrowser forms of all Browser library commands, functions and messages have been retained for backwards compatiblity and these are documented as synonyms. The XBrowser functions are deprecated, this means that they should not normally be used in new code except for the maintainance of older applications that depend on them.

The syntax of these older functions differs slightly from that documented and used in the new functions.

The revBrowser functions (with the exception of revBrowserOpen) all require a browser id, which tells Revolution which browser object to act upon. This id is returned by the revBrowserOpen function and should be saved in the calling application. The browser id is always the first parameter given to any revBrowser function and always the first parameter passed to any browser callback.

The deprecated XBrowser functions can optionally take a browser id parameter. If the browser id is not given, then the last browser created by the XBrowser_Open command is used. The browser id is always the last parameter passed to an XBrowser function.

Do not mix the revBrowser and XBrowser functions in an application. The two sets of functions have not been designed to be compatible with each other and mixing them will almost certainly cause unexpected results.

The default rect of a new browser instance is 0,0,0,0. To change this, set the "rect" property using the revBrowserSet command.

The callbacks sent by the browser depend on whether the browser was opened using revBrowserOpen or XBrowser_Open. If revBrowserOpen was used, the callbacks prefixed with "browser" are used, otherwise, those prefixed by "XBrowser_" are used.

It is currently possible to cancel browser operations by setting the browserCancel global variable to true. If using the XBrowser functions, then the global variable XBrowserCancel should be used instead.

The browser library functions will throw an execution error if they encounter a problem. These can be caught by handling the errorDialog message or by using a try / catch block. In general there is no need to check the result, as nearly all the commands and functions put empty into it.

User Comments
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Dec 29, 2009
The default size of a browser window that is opened with the revBrowserOpen command is one pixel! That is not visible, so it looks like the revBrowserOpen command is not doing anything. You need to additionally use the revBrowserSet command to set the rect of the browser window to a size that is actually visible!