getCurrentYear

README.md

GetCurrentYear.js

1. Define an element with id currentYear.
2. Paste the following, after that element

<script>document.querySelector('#currentYear').innerHTML = new Date().getFullYear();</script>

Or the following. I don't see why you would pick the longer one though.

<script src="https://gist.github.com/raw/9ccf06916caa8583be5ca5c1995cc2a1/getCurrentYear.js" type="application/javascript"></script>

getCurrentYear.js

/**
 * Get current year dynamically, so that you don't have to update the
 * year manually on a static website.
 **/
(function() {
  const defaultId = 'currentYear';
  const urlParams = new URLSearchParams(window.location.search);
  const id = urlParams.get('id') || defaultId;
  document.querySelector('#' + id).innerHTML = new Date().getFullYear();
})();