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https://issues.apache.org/jira/browse/MYFACES-4230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16472281#comment-16472281
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Werner Punz commented on MYFACES-4230:
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Found it, there is a deviation in the dom behavior between ie11 and modern
browsers.
Modern browsers basically return an empty string on a fieldset name.
IE11 returns a null
!ie11.png!
now compared to a modern browser (Chrome in this case)
!modern.png!
Apparently Microsoft has fixed this deviation in Edge and edge behaves as
normal.
I will add an appropriate check to handle undefineds and nulls and empty
strings the same for this case.
> IE 11 an javascript error occured after rerender part of the page
> -----------------------------------------------------------------
>
> Key: MYFACES-4230
> URL: https://issues.apache.org/jira/browse/MYFACES-4230
> Project: MyFaces Core
> Issue Type: Bug
> Affects Versions: 2.3.0, 2.3.1
> Environment: MyFaces 2.3.1
> Reporter: Niels Borman
> Assignee: Werner Punz
> Priority: Critical
> Fix For: 2.3.2
>
> Attachments: 1 - Error element name null.png, 2 - Error element.png,
> 3 - html.png, Screen Shot 2018-05-08 at 09.15.36.png, ie11.png, modern.png
>
>
> In IE 11 we get an javascript error:
> TypeError: Unable to get property 'indexOf' of undefined or null reference
>
> This error arises on linenumber 7451 of jsf.js. The element is in IE
> undefined so the error is thrown. Can you please make the if statement so
> that there is a check if name is not undefined. In other browsers the name
> property is “” so the error doen’s occure.
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