I could not replicate this error report

It seems that the client-side validations are not executed on click of "save" i.e apply button for any of the inbuilt extension except article creation

Code generated or save button for article

<joomla-toolbar-button id="toolbar-apply" task="article.apply" form-validation="">
<button class="button-apply  btn btn-sm btn-success" type="button">
	<span class="icon-apply" aria-hidden="true"></span>
	Save</button>
</joomla-toolbar-button>

Code generated for save button for user creation

<joomla-toolbar-button id="toolbar-apply" task="user.apply">
<button class="button-apply  btn btn-sm btn-success" type="button">
	<span class="icon-apply" aria-hidden="true"></span>
	Save</button>
</joomla-toolbar-button>

form-validation="" is the extra attribute in the button HTML which is missing in "save" button of user creation view

I could reproduce it!

Same with almost every other form. Contact, Tag, User Note, User Level, etc.

I see 2 options:

1. Not use Joomla\CMS\ToolbarHelper::apply() here.
2. Make use of methods defined in Joomla\CMS\Toolbar\CoreButtonsTrait in Joomla\CMS\Toolbar\ToolbarHelper.

@asika32764 What do you think?

I need check the code, since the HTML side was changed to CE, I' not sure the form validation process how to work with toolbar buttons

It's not to do with CE but with ToolbarHelper adding a button in a basic way:

Instead we can use the trait which also enables validation:

My question is whether we should make the changes in ToolbarHelper or remove the uses of ToolbarHelper in views and use trait methods directly.

I see,

I think we can try proxy ToolbarHelper::apply() to CoreButtonsTrait::apply() so that all components which uses ToolbarHelper won't break and keep B/C.

CoreButtonsTrait has already uses by Toolbar class so we can do like this:

class ToolbarHelper 
{
    public static apply(...) 
    {
        $bar = Toolbar::getInstance('toolbar'); 
        return $bar->apply(...);
    }
}

I cannot reproduce this issue in 4.0.0-beta1-dev. I am using Firefox for the browser and MYSQL for database.

how to know if the client side verification is happening or not ??
can't reproduce the issue

@vbv2312 The form is getting submitted even if the required fields are not filled. If the client-side validations are working then the form will not be submitted at all if any required filed is not filled.

Set to "closed" on behalf of @SharkyKZ by The JTracker Application at issues.joomla.org/joomla-cms/26639

Please test PR #28897.