Why does the "tmpl=component" is excluded from the administrator login form's $return url?

[ahamed]

Hi there,
After some investigation, I've found that, if tmpl=component is present in the return URL of the login form (administrator client) then Joomla! redirects to the root, i.e. index.php.

For example, I am developing an application that is based on a single view (SPA). For my full application, I need to stay on tmpl=component. But if the user logged out (while working) and logged in again, then the login module redirects the user to the index.php page. And this is only happening because of the tmpl=component present in the $return URL.

But why did you need to do this?

Reference:

joomla-cms/administrator/components/com_login/src/Controller/DisplayController.php

Line 84 in fe8413e

if (Uri::isInternal($return) && strpos($return, 'tmpl=component') === false) {