J3.x:Developing an MVC Component/Upgrading to Joomla4/156/en

Javascript and the Web Asset Manager

The web asset manager has been introduced in Joomla 4 and is well documented here. It provides a much-improved means of managing JS and CSS resources, and a framework for handling their dependencies.

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Translations:J3.x:Developing an MVC Component/Upgrading to Joomla4/156/en

From Joomla! Documentation

Javascript and the Web Asset Manager