While I'm not an expert I believe for development the best process is to put assets in the resources folder and then compile them to the public folder.
Why so ?
Well you keep sustainability in your project because everything is centralized and also you follow a common development process of the applications, you keep the resources readable for developers and you also get to keep track of compilations you do if I remember correctly using Laravel mix.
Therefore my opinion goes in:
Use resources folder with your assets and then compile them.
(from stackoverflow: https://stackoverflow.com/a/28496384)
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