I need a pro js & html expect for a quick job

I have a js file i that does some calculation so i need to post this calculations immediately the submit button is been clicked you need to delay the for for the database transaction to complete but during this process you need to display a loading showing processing.


please i have a fixed budget of $5 for this project don't respond if you're not okay with the price and please i need it in 1 hour to 2 hours maximum.