Found in GWT Release: 1.5.3

Detailed description: When I open page with gwt module in IE8, it display error messages: Webpage error details

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.0.04506; .NET CLR 3.5.30729) Timestamp: Tue, 3 Feb 2009 20:05:07 UTC

Message: Not implemented

Line: 6305 Char: 3 Code: 0 URI: http://localhost/PostAffiliatePro/trunk/client/www/com.qualityunit.pap.AffiliateLoginModule/5BE6E2E764FA39982EF56CD916144305.cache.html

Message: 'parentElement' is null or not an object Line: 6280 Char: 5 Code: 0 URI: http://localhost/PostAffiliatePro/trunk/client/www/com.qualityunit.pap.AffiliateLoginModule/5BE6E2E764FA39982EF56CD916144305.cache.html

I found, that the problem is on following line: line 6305: style.setExpression('left', 'this.__popup.offsetLeft'); it is located in function $onShow(popup)

AND line 6280: frame.parentElement.removeChild(frame); in function $onHide(popup){

Both functions are in WidgetCollection$WidgetIterator

Workaround if you have one: No workaround found yet

Links to the relevant GWT Developer Forum posts:

similar problem is discussed here: http://www.ericmmartin.com/projects/simplemodal/#comment-6175

adding fixed the problem

But best would be to find reason and fix it also for standard IE8 mode

To John for further triage. Is this a general "we don't grok ie8 yet" bug, and if so is there an umbrella bug for such? If not, could you just mark this as accepted?

I don't like IE8 too (as all IE), but I think is time to not ignore IE8, because if it will be released officially, it will be late to fix such bugs. 50% of users of our applications have IE :-(

Occurs with GWT 1.6.2 too. Using -style DETAILED the javascript function containing style.setExpression() is

function com_google_gwt_user_client_ui_impl_PopupImplIE6_$onShow__Lcom_google_gwt_user_client_ui_impl_PopupImplIE6_2Lcom_google_gwt_user_client_Element_2(popup)

I commented out the style.setExpression() lines in the onShow() generated javascript and my popup windows seemed to work just fine in IE8 and IE6:

function com_google_gwt_user_client_ui_impl_PopupImplIE6_$onShow__Lcom_google_gwt_user_client_ui_impl_PopupImplIE6_2Lcom_google_gwt_user_client_Element_2(popup){ var frame = $doc.createElement($intern_1350); frame.src = $intern_1351; frame.scrolling = $intern_1352; frame.frameBorder = 0; popup.__frame = frame; frame.__popup = popup; var style = frame.style; style.position = $intern_1314; style.filter = $intern_1353; style.visibility = popup.style.visibility; style.border = 0; style.padding = 0; style.margin = 0; style.left = popup.offsetLeft; style.top = popup.offsetTop; style.width = popup.offsetWidth; style.height = popup.offsetHeight; style.zIndex = popup.style.zIndex; /* style.setExpression($intern_110, $intern_1354); style.setExpression($intern_111, $intern_1355); style.setExpression($intern_91, $intern_1356); style.setExpression($intern_93, $intern_1357); style.setExpression($intern_1358, $intern_1359); */ popup.parentElement.insertBefore(frame, popup); }

This is GWT 1.5.3.

I've been working on explicit IE8 support (see issue 3558), which should make this problem go away.

This is fixed along with issue 3558 (IE8 now completely skips all that stuff).

I still get erroneous behavior in IE8. However, if I put it in IE7 compatible mode, it works fine.

I upgraded to GWT 1.7 (from 1.6) and it didn't seem to fix the issue. I still get : Webpage error details

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; MS-RTC LM 8; InfoPath.2) Timestamp: Mon, 3 Aug 2009 17:02:15 UTC

Message: Not implemented

Line: 1867 Char: 324 Code: 0 URI: http://localhost:8080/MyProject/myproject/71C57EA2A332BD00DED9E2B73394450A.cache.html

If you could post a sample that exhibits this behavior, that would be really helpful. The PopupImpl code that was using expressions is definitely not called on IE8 under normal circumstances.