Quirks Mode Support

[dhroth]

I recently started to use GWT 2.4 (previously used 2.1) and noticed a message in the hosted mode log indicating that quirks mode is no longer supported by GWT.

[INFO] GWT no longer supports Quirks Mode (document.compatMode=' BackCompat').<br>Make sure your application's host HTML page has a Standards Mode (document.compatMode=' CSS1Compat') doctype,<br>e.g. by using &lt;!doctype html&gt; at the start of your application's HTML page.<br><br>To continue using this unsupported rendering mode and risk layout problems, suppress this message by adding<br>the following line to your*.gwt.xml module file:<br>&nbsp;&nbsp;&lt;extend-configuration-property name="document.compatMode" value="BackCompat"/&gt;

However, in the GWT 2.4 FAQ documentation, I found the following:

Does GWT support standards mode?

As of GWT 1.5, yes. Standards mode is supported. For backwards compatibility, quirks mode is also still supported. Support for quirks mode, however, may be dropped in future versions of GWT, and it is recommended that you update your GWT-enabled pages to use standards mode.

I ran my application in quirks mode without any issues. At this point, I need to be able to run in quirks mode because my custom GWT widgets are wrappers for a JavaScript library that requires quirks mode at least for now until we convert it to run in standards mode.

 

Can someone clarify what the log message means and why there is a discrepancy between that and the documentation?  Since my application appears to work as it did before, does the message mean that there will no longer be active maintenance of the code that supports quirks mode, but the support is not being removed?

 

Thanks.

 

[Karen]

Did you have any update about it? I'm with same problem. 

Thanks.

[Matthew Dempsky]

The quirks mode warning is just a warning.  It also includes instructions on how to silence it: just add <set-configuration-property name="document.compatMode" value="BackCompat"/> to your .gwt.xml file.

However, be aware this isn't a supported mode of operation.  You should really try to switch to standards mode.

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