where is create-react-app webpack config and files?

If you want to find webpack files and configurations go to your package.json file and look for scripts You will find that scripts object is using a library react-scripts Now go to node_modules and look for react-scripts folder react-script-in-node-modules This react-scripts/scripts and react-scripts/config folder contains all the webpack configurations.

How to get scrollbar position with Javascript?

You can use element.scrollTop and element.scrollLeft to get the vertical and horizontal offset, respectively, that has been scrolled. element can be document.body if you care about the whole page. You can compare it to element.offsetHeight and element.offsetWidth (again, element may be the body) if you need percentages.

Make Discord bot send picture with message with NodeJS

ClientUser.sendMessage is deprecated, as is the file parameter in its options. You should be using Channel.send(message, options), with files as an array of strings or FileOptions. If you want to stick to your deprecated methods, ClientUser.sendFile might be something of interest to you, though I do recommend you move over to the stuff that’s more current.