The administration of Shopware 6 mainly uses VueJS as a framework. How to develop with VueJS is not explained here, head over to the official documentation to learn more about the framework itself.
Of course any Shopware 6 specific code will be explained, don't worry about that.
Each plugin has a main entry point to add custom javascript code to the administration. By default, Shopware 6 is looking for a
main.js file inside a src/Resources/app/administration/src directory in your plugin.
Thus, create a new file main.js in the directory <plugin root>/src/Resources/app/administration/src. That's it, this file will now be considered when building
the administration.
