[jbosstools-issues] [JBoss JIRA] (JBIDE-13742) Investigate how modernizr affects vjet/jsdt/etc.

[Victor Rubezhny (JIRA)]

    [ https://issues.jboss.org/browse/JBIDE-13742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12767677#comment-12767677 ] 

Victor Rubezhny commented on JBIDE-13742:
-----------------------------------------

jsdt don't look at anything for sure. It tries to create an AST due to provide a static model of JavaScript and use it to create JavaScript objects. Theoretically under some circumstances it can show you the Modernizr script properties/functions, but it's very poor on object types calculation for content assist.

VJet does in pretty similar way (extended in model calculation process), but its efforts are killed the the issue with Regular Expressions. It just cannot parse these JavaScripts. Once [this issue|https://bugs.eclipse.org/bugs/show_bug.cgi?id=401250] is fixed we'll have to test VJet again against the Modernizr usage.

NexJ builds a model dynamically by executing JavaScript code on the fly due to calculate the object types... But there are also the issues with minified JQuery scripts. So, actually it just doesn't work for Modernizr script.

So, yes. This is a problem for content assist. 

But I really don't believe that either JSDT or VJET (even when the issues will be fixed) will be able to use Modernizr to detect what JS-features are supported by a browser (and native browser code will will be executed ) and what JS-features aren't browser supported (and JS/CSS loaded by Modernizr will be executed instead of native code). It's just because neighter JSDT not VJET execute the code: they just parse it in different ways.

NexJ could be more positive here (of course when minified JS issues are fixed) because it executes the code due to provide the JS Objects. So, probably it it will be able to execute Modernizr then it could calculate types properly. But it still will not be able to predict how Modernizr will actually work on a user's browser.
                
> Investigate how modernizr affects vjet/jsdt/etc.
> ------------------------------------------------
>
>                 Key: JBIDE-13742
>                 URL: https://issues.jboss.org/browse/JBIDE-13742
>             Project: Tools (JBoss Tools)
>          Issue Type: Feature Request
>          Components: jsp/jsf/xml/html source editing
>            Reporter: Max Rydahl Andersen
>            Assignee: Victor Rubezhny
>             Fix For: 4.1.x
>
>
> Check how javascript completion is affected by usage of modernizr.
> http://modernizr.com/docs/#load
> Can they still provide code completion for the library ?

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira