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how to display a error or warning message on the workitem with javascript / dojo ?

Olivier ROSET (50121) | asked Feb 19 '19, 9:03 a.m.
edited Feb 20 '19, 10:35 a.m.


In RTC, when we forget a mandatory field when creating a workitem, we have a nice red message at the top of the workitem screen.
Is it possible, in a Validator or DefaultValue or CalculatedValue script, to display a message of this type in the same place?
How to access the DOM of the RTC page from javascript?
Through dojo?

The real question is : is it possible, in (by example), a condition Script, to access the DOMof the current page displayed by RTC? I wanted to have access to a html element an be able to modify his innerHtml by document.getElementById("xx").innerHtml or some stuff like that. 

Ralph Schoon commented Feb 20 '19, 11:56 a.m.

I know that some have added hover information to the work item web UI using a theme. I have no example and I am convinced that you should stay well within the limits of .

It is possible to create custom attribute presentations.

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Olivier ROSET (50121) | answered May 06 '20, 1:33 p.m.
One solution : 

 I know it's HORRIBLE and please, use it ONLY if you have no other solution :)

In my javascript I use a code like this : 

let balise = document.getElementsByClassName("validationMessageAnchor")[1];
balise.innerHTML = '<span style="display:block;.....etc...

This display a message just after the workitem type and Id on the top of the workitem screen. 
I know,I know.... it's BAD and not durable !!!! 

Sorry. :)

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