x
 
<!DOCTYPE html>
<html>
<body>
<p>本例使用 addEventListener() 方法将 "click" 事件附加到 p 元素。</p>
<p id="demo">点击我.</p>
<script>
document.getElementById("demo").addEventListener("click", myFunction);
function myFunction() {
  document.getElementById("demo").innerHTML = "YOU CLICKED ME!";
}
</script>
</body>
</html>