[Pas2js] fieldset (or other tag) change the disabled attribute

Michael Van Canneyt michael at freepascal.org
Tue Sep 13 16:33:57 CEST 2022

On Tue, 13 Sep 2022, Luca Olivetti wrote:

> Hello,
> the bulma documentation says that you can disable a form partially or totally 
> by enclosing the fields to be disabled in a
> <fieldset disabled></fieldset>
> tag.
> I could find no way to change the disabled using the classes in htmlwidgets, 
> I couldn't find a TJSHTMLFieldSet and TJSHTMLElement has no disabled 
> attribute.

You can access ALL attributes using the properties property of TJSObject.

So if 'El' is your object instance then you can set disabled:


it is also the default property so the following also works:


> I cast it to a TJSHTMLButtonElement and it works, but, meh, I don't like it.
> I added a "disabled" field to TJSHTMLElement (and removed it from all other 
> descendant) and it also works.
> I also don't like to have some elements using htmlwidgets and other elements 
> using TJS*.
> Is there a better, proper, way?

The correct way is to introduce TJSHTMLFieldSet and declare the disabled
property. As long as that class does not exist, see above.


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