The expected behavior (according to my Javascript book) -- on cancel, it should return null. Otherwise, the string entered should be returned. However I can't get this loop to work (it deals with all of the cases): var value; var done = false; while ( done == false ) { value = prompt( "Enter a value", "" ); dump( "value is " + value + "\n" ); // always prints nothing if ( value== null ) done = true; // cancel should take me here, it doesn't else if ( group == "" ) alert( "Please enter a value name" ); // I always get here, even if data was entered else done = true; } As the comments indicate, regardless of what I enter or if I press ok or cancel, I get "" as a rturn value.

In the previous bug report, "group" should be "value". Here is the modified code: var value; var done = false; while ( done == false ) { value = prompt( "Enter a value", "" ); dump( "value is " + value + "\n" ); if ( value == null ) done = true; else if ( value == "" ) alert( "Please enter a value" ); else done = true; }

reassigning to danm. syd, why is this marked critical severity? Critical is supposed to indicate crash, data loss or severe leak.

Looks to me like nsCommonDialogs aren't set up to catch the Cancel button and munge the response appropriately. David?

Nope. The problem is in the DOM where it takes the cancel return value and converts it into a empty nsString rather than returning the expected null pointer. Of course you can't return a null pointer since the string is being passed by reference ;) reassigning back to danm

mass-moving all m12 bugs to m13

*** Bug 23107 has been marked as a duplicate of this bug. ***

BULK MOVE: Changing component from XUL to XP Toolkit/Widgets: XUL. XUL component will be deleted.

Mass-moving all M16 non-feature bugs to M17, which we still consider to be part of beta2

nominating nsbeta2 -- this is base DOM 0 functionality

[nsbeta2+]

window.prompt() now returns a null JS value when the user punches "cancel".

*** Bug 43660 has been marked as a duplicate of this bug. ***

Updating QA Contact for a verification.

verified fixed -- 2000071810 mac/linux, 2000071910 win2k -- window.prompt() returns null on cancel, and the string on OK (incl. "").