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https://issues.apache.org/jira/browse/XAP-313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12473834
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Turyn, Michael commented on XAP-313:
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Note: this is a relatively innocuous XUL error, and not a fatal
exception---the standard user who has no idea of the JS console won't be
bothered by it, since the alert() still works.
Other data:
If focus is moved to a page element outside of the DIV enclosing the XAP
application between typing in the textfield and hitting the button, the error
goes away.
If focus is moved to a selectable label _within_ the xap application
If a debugger breakpoint is place on the "alert" line, the error vanishes.
If a 0-ms timeout is used to bring up the alert box, no error.
If a prompt() is used instead of an alert(0, no bug.
Conclusion: The textfield has been left in some weird state I can't ascertain
yet.
> Strange error when calling an MCO with an alert in FireFox
> ----------------------------------------------------------
>
> Key: XAP-313
> URL: https://issues.apache.org/jira/browse/XAP-313
> Project: XAP
> Issue Type: Bug
> Reporter: Trevor Oldak
> Priority: Minor
>
> Load the followng 2 files:
> index.xal
> <xal xmlns="http://openxal.org/ui";>
> <mco xmlns="http://openxal.org/core/mco"; id="handler"
> class="EventHandler" src="src-js/EventHandler.js"/>
> <freePane xmlns="http://openxal.org/ui"; id="panel" width="500px"
> height="300px" fontSize="10pt">
> <button text="Input your name and click"
> onCommand="mco:handler.passParam('foo')"/>
> <textField xmlns="http://openxal.org/ui/html"; height="20px" text=""
> id="name" width="150px"
> x="200px" fontSize="10pt"/>
> </freePane>
> </xal>
> EventHandler.js
> EventHandler = function () {
> };
> EventHandler.prototype.passParam = function (name) {
> alert('Hello '+name+'!');
> return;
> };
> 1) Enter text into the text field
> 2) Click the button. In FireFox, a bug will be thrown:
> [Exception... "'Permission denied to set property XULElement.selectedIndex'
> when calling method: [nsIAutoCompletePopup::selectedIndex]" nsresult:
> "0x8057001e (NS_ERROR_XPC_JS_THREW_STRING)" location: "JS frame ::
> http://localhost:81/XAP_testing53/.dist/samples/xap/xapcore.js :: anonymous
> :: line 113" data: no]
> xapcore.js (line 113)
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