I've been racking my brain how to add links to all the views of my component in the shiny new Joomla4 backend; I used to do it via JSubmenuHelper, but that, apparently being deprecated also before, has now been completely removed.

I've tried what's mentioned here: How do I apply JHtmlSidebar to add a sidebar to my admin view? , i.e., in the views, I call first the addSubmenu function of the helper (which in turn uses JHtmlSidebar::addEntry), then JHtmlSidebar::render in my view.html.php (in the display method of the JViewLegacy-derived class there).

But I don't get any menu entries for my component. The "default" view shows up fine, but I don't get submenu entries or tabs to link to the other views of my component. There are no errors in the browser or in the logs; I just don't get any indication of the submenu on the left. Edit: I don't get it to run with JHtmlSidebar in J3 as well. There must be something I'm missing. Here's my code: In the view.html.php:

class mycomponentViewblocklist extends JViewLegacy
  function display($tpl = null) {
    // other stuff...
    $this->sidebar = JHtmlSidebar::render();

In helpers/mycomponent.php:

class mycomponentHelper extends JHelperContent
  public static function addSubmenu($vName)
        $vName == 'myview'
    // ...

This does not work in J3 and J4, while using JSubMenuHelper::addEntry instead of JHtmlSidebar::addEntry does work in J3. What else is required? Do I need to add something in my tmpl folder?

I can't see any obvious difference to what I'm doing in comparison to the com_banner component, which gets a nice submenu with all its four views as link entries (edit: see my answer below about the submenu; I misunderstood where that came from; but it also has a nice sidebar on the left in addition to the submenu).

For all the announcement of Joomla4, so far I have seen relatively little in terms of migration guides for J3 / J2 components, could anybody point me in some direction there maybe, if this could help the issue here?

  • The only source I found so far is this one: docs.joomla.org/… More input and descriptions of new implementation approaches are welcome. Commented Feb 26, 2018 at 21:42

1 Answer 1


Finally figured it out - my problem is a missing placeholder in the tmpl (which was not required for JSubMenuHelper). Added this to my tmpl/default.php, now it works:

<div id="j-sidebar-container" class="span2">
    <?php echo $this->sidebar; ?>

The submenu in banners I was wondering about is actually done via the manifest file, there are entries like this:

  <menu img="class:banners">com_banners</menu>
      Note that all & must be escaped to &amp; for the file to be valid
      XML and be parsed by the installer

These are responsible for creating the submenu both in J3 and J4.

  • Note that in J4, you should use col-md-X instead of span2 as we don't use Bootstrap 2 anymore
    – Lodder
    Commented Feb 27, 2018 at 23:33
  • Thanks! Copied that bit from the banner component, so it should be changed there too :D
    – codeling
    Commented Feb 28, 2018 at 8:06
  • Definitely not in com_banners for Joomla 4 having migrated all the view myself :)
    – Lodder
    Commented Feb 28, 2018 at 8:39
  • could have been the J3 banners component as well, sorry for throwing around accusations before checking ;)
    – codeling
    Commented Feb 28, 2018 at 8:43
  • you're of course right. a quick side question on that maybe - this new type of extensions, since what Joomla version is it supported? Ideally I'd like to maintain just one version of my extensions...
    – codeling
    Commented Feb 28, 2018 at 8:45

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