media/system/js/tabs.js is used in core by the deprecated JHtmlTabs class, removed in 4.0 as MooTools library support was dropped. So you shouldn't be using that at this point anyway.

Ok, I don’t see jhtmltabs in this document.

https://docs.joomla.org/Potential_backward_compatibility_issues_in_Joomla_4

From: Michael Babker [mailto:notifications@github.com]
Sent: Sunday, December 23, 2018 8:34 PM
To: joomla/joomla-cms
Cc: rgjoyce; Author
Subject: Re: [joomla/joomla-cms] tabs js files missing from media/system/js folder (#23323)

media/system/js/tabs.js is used in core by the deprecated JHtmlTabs class, removed in 4.0 as MooTools library support was dropped. So you shouldn't be using that at this point anyway.

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As it says, the document is incomplete. If you look at the class in 3.x it does have deprecation notices, those shouldn't be ignored either.

I understand and many thanks.

However, What do I replace it with?

From: Michael Babker [mailto:notifications@github.com]
Sent: Sunday, December 23, 2018 8:49 PM
To: joomla/joomla-cms
Cc: rgjoyce; Author
Subject: Re: [joomla/joomla-cms] tabs js files missing from media/system/js folder (#23323)

As it says, the document is incomplete. If you look at the class in 3.x it does have deprecation notices, those shouldn't be ignored either.

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Do you mean how to use Bootstrap based Tabs, while also remembering last active TAB ?

Yes, how to use bootstrap tabs.

Rob

From: Georgios Papadakis [mailto:notifications@github.com]
Sent: Monday, December 24, 2018 1:24 AM
To: joomla/joomla-cms
Cc: rgjoyce; Author
Subject: Re: [joomla/joomla-cms] tabs js files missing from media/system/js folder (#23323)

Do you mean how to use Bootstrap based Tabs, while also remembering last active TAB ?

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To keep track which Tab was last active,
you will need to do with your own code

• any better way please someone say

in my example below,
i am using a cookie to set Last active Tab of every Tab-Set
which is indexed by the HTML TagId of every Tab-Set,

Please correct any syntax or logic errors i have made below

<?php
$jcookie       = JFactory::getApplication()->input->cookie;
$itemset_tagid = 'some_tagid';
$cookie_name   = 'some_cookie_name';

// Get cookie of all Tab-Sets
$tabs_conf = $jcookie->get($cookie_name, '{}', 'string');

// Try to parse cookie contents
try
{
	$tabs_conf = json_decode($tabs_conf);
}
catch (Exception $e)
{
	$jcookie->set($cookie_name, '{}', time()+60*60*24, JUri::base(true), '');
}

$tabs_conf = is_object($tabs_conf)
	? $tabs_conf
	: (new stdClass);


// "tabs_conf" is an object, where every property is the HTML TAGID of every Tab-Set
$last_active_tagid_from_cookie = !empty($tabs_conf->$itemset_tagid)
	? $tabs_conf->$itemset_tagid
	: $itemset_tagid . '_' . $items[0]->id;  // Activate first TAB


JHtml::_('bootstrap.startTabSet',
	$itemset_tagid,
	array('active' => $last_active_tagid_from_cookie)
);

/**
 * $items have content of your Tabs
 */
foreach ($items as $item)
{
	JHtml::_('bootstrap.addTab',
		$itemset_tagid,
		$itemset_tagid . '_' . $item->id,
		$item->title
	);

	// Add item HTML here

	JHtml::_('bootstrap.endTab');
}

JHtml::_('bootstrap.endTabSet');

?>

<script>

(function($) {
	$(document).ready(function ()
	{
		$('#<?php $itemset_tagid; ?>Tabs"').on('shown', function ()
		{
			/**
			 * Try to use a same cookie for all Tab-Sets 
			 */
			var tabs_conf = YOUR_METHOD_TO_GET_COOKIE('<?php $cookie_name; ?>');
			try { tabs_conf = JSON.parse(tabs_conf); } catch(e) { tabs_conf = {}; }

			var new_active_tagid = $('#<?php $itemset_tagid; ?>Tabs').next().find('.active').attr('id');

			/**
			 * Set new_active_tagid to the cookie of all Tab-Sets 
			 */
			tabs_conf['<?php $itemset_tagid; ?>'] = new_active_tagid;
			YOUR_METHOD_TO_GET_COOKIE('<?php $cookie_name; ?>', JSON.stringify(tabs_conf));
		});
	});
});

</script>

Set to "closed" on behalf of @Quy by The JTracker Application at issues.joomla.org/joomla-cms/23323