代码示例:(标识:event_onhashchange)
<!DOCTYPE html>
<html>
<body onhashchange="myFunction()">

<p>点击按钮将当前网址的锚部分改为 #part5</p>

<button onclick="changePart()">试一试</button>

<p id="demo"></p>

<script>
// 使用 location.hash 属性更改锚部分
function changePart() {
  location.hash = "part5";
  var x = location.hash;
  document.getElementById("demo").innerHTML = "The anchor part is now: " + x;
}

// 如果锚部分发生改变,则提示一些文本
function myFunction() {
  alert("The anchor part has changed!");
}
</script>

</body>
</html>
运行结果: