ActionScript for Flash MX: The Definitive Guide, 2nd Edition By Colin Moock
Chapter 18. ActionScript Language Reference
#strict Pragma
Flash 5 (undocumented)
activates enhanced conformance to ECMA-26 standard
#strict
Description
An undocumented and volatile feature, the #strict pragma forces the Flash Player to conform more closely to the ECMA-262 specification, upon which ActionScript is based. It affects datatype conversion for the undefined and string datatypes, and it enforces complete case sensitivity.
The #strict pragma is known to crash Internet Explorer on Windows under Flash Player 6 and should therefore not be used. At the time of this writing, Macromedia officially rescinded support for #strict in Flash Player 6.0.61.0 after the public beta test of Flash Player 6.0.60.48 revealed outstanding problems. For more details and the latest information on the status of #strict, see: http://www.moock.org/asdg/technotes/strict.
