<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css" integrity="sha384-9gVQ4dYFwwWSjIDZnLEWnxCjeSWFphJiwGPXr1jddIhOegiu1FwO5qRGvFXOdJZ4" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.3.1.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js" integrity="sha384-cs/chFZiN24E4KMATLdqdvsezGxaGsi4hLGOzlXwp5UZB1LY//20VyM2taTB4QvJ" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js" integrity="sha384-uefMccjFJAIv6A+rW+L4AHf99KvxDjWSu1z9VI8SKNVmz4sk7buKt/6v9KI65qnm" crossorigin="anonymous"></script>
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet">
My project functions correctly with the provided link. However, in cases where I do not have access to the internet, I download and save the files locally in the same folder as the page. Unfortunately, this approach sometimes causes the files to stop working properly. I have made the following adjustments:
<script src="jquery-3.3.1.min.js"></script>
<script src="popper.min.js"></script>
<script src="bootstrap.min.js"></script>
<link href="font-awesome.min.css" rel="stylesheet">
Edit Structure of my folders:
auctionDetails.php carousel.html delete.html navbar.html README.md signupSuccessful.html
auction.php carousel.php font-awesome.min.css newnavbar.php search.php style.css
bootstrap-4.1.0-dist.zip cart.php footer.html popper.min.js signinnavbar.html test1.html
bootstrap.min.css cow.jpeg insertLike.php productDetails.css signIn.php test.php
bootstrap.min.js database.php jquery-3.3.1.js productDetails.php signUp.php
Edit2
After fixing some missing jQuery issues, the functionality has been restored. However, the problem with font-awesome persists.