Because of the scoping rules, you cannot actually examine the value of the variable that has changed since the event handler is running in a completely different scope chain.
<HTML> <HEAD></HEAD> <BODY> <SCRIPT> function watchFunct() { alert("Variable changed"); } watch("myVariable", watchFunct) myVariable = 100; myVariable = 200; unwatch("myVariable") myVariable = 300; </SCRIPT> </BODY> </HTML>
See also: | Object.assign(), Object.watch() |
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JavaScript Programmer's Reference, Cliff Wootton Wrox Press (www.wrox.com) Join the Wrox JavaScript forum at p2p.wrox.com Please report problems to support@wrox.com © 2001 Wrox Press. All Rights Reserved. Terms and conditions. |