Quick and easy way
I was working on a site using vanilla HTML + JS, but I missed one of the best features provided by those quick start packages (such as create-react-app or Vue CLI): when I save the file in the code editor, re Load the page.
The easiest way I found is to install
npm install -g browser-sync
Then run it in your project folder:
browser-sync start --server --files "."
The above command monitors all files in the current folder (and all subfolders) for changes, starts the web server on port 3000, opens a browser window to connect to the server.
The browser will refresh every time the file is changed.
Very useful when making prototypes!