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https://issues.apache.org/jira/browse/NETBEANS-4967?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17224662#comment-17224662
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Christian Lenz commented on NETBEANS-4967:
------------------------------------------

You can't update your IDE, you need to update the JS Parser from the NetBeans 
code to get the support for this. So you need to contribute to the core or hope 
for someone to make it.

> Doesn't support optional chaining in JS
> ---------------------------------------
>
>                 Key: NETBEANS-4967
>                 URL: https://issues.apache.org/jira/browse/NETBEANS-4967
>             Project: NetBeans
>          Issue Type: New Feature
>    Affects Versions: 12.1
>            Reporter: dj dance
>            Priority: Major
>
> It doesn't support optional chaining in JS
>  
> For example, it considers the following as a bug and stop working.
>  
> var k=obj?.prop



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