Your code runs normally but your local host is down

The most normal thing to do is to open your terminal and run npm run dev to bring up local host again

npm run dev is a command line that brings out your very own local host on your desktop to locally run your code and get a live preview; it helps with when you are working and don't want to push your code for deployment just yet

and all of a sudden npm run dev throws an error

Not to panic because there's usually one solution to problems like this

you are most likely on the wrong command line

it is important to type in cd then the exact name

of your folder the vite app is inside

and then press on the enter key

if it's successful it runs a run circle just there and a message like this pops up

5173 is the local host for vite react apps if you have more than one tabs for maybe different projects you get hit with 5174, 5175

If you have made it this far, happy coding and I hope you have learnt a thing or two about terminal command lines and javascript frameworks local hosting