url-fragment.html

js/url-fragment.html
<!doctype html>
<html lang=en>
<head>
<meta charset=utf-8>
<style>
a {
  display: block;
  border: 1px solid black;
}
:target {
  background-color: red;
}
</style>
</head>
<body>
  <p>Try: 1) click links 2) edit URL browser bar manually and enter 3) open new tab with a fragment 4) history</p>
  <a id ="1" href="#1">1</a>
  <a id ="2" href="#2">2</a>
  <a id ="3" href="#3">3</a>
  <p id="log"></p>
<script>
const log = document.getElementById('log')
const a1 = document.getElementById('1')
window.onhashchange = (e) => {
  log.innerHTML += `<div>a1.target=${a1.target}</div>`
}
</script>
</body>
</html>