We will briefly describe the main parts of the code, and then present the overall file. Again, the aim here isn't to provide a tutorial on HTML or frontends in general, but to give an example of one way of creating an ICO web page.
Starting at the end of the file, we import a series of JavaSscript files:
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js"></script><script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script><script src="https://cdn.jsdelivr.net/gh/ethereum/web3.js/dist/web3.min.js"></script><script src="https://cdn.jsdelivr.net/npm/truffle-contract@3.0.6/dist/truffle-contract.min.js"></script> ...
