Download via Extension Manager

In the TYPO3 Backend go to Admin Tools > Extensions. Change in the dropdown on the top left to ‘Get Extensions’, enter the extension key ‘extender’ in the text field below the headline ‘Get Extensions’ and hit go. In the result list install the extension by hitting the action for that.

Download via Composer

Add evoweb/extender to the require in your composer.json like in the following example and run ‘composer install’.

        "require": {
                "typo3/cms-core": "^10.0",
                "evoweb/extender": "*",

Alternatively if you have an existing project with a configured composer.json you can add extender with the command by running ‘composer require evoweb/extender’.