代码示例:(标识:eg_js_addeventlistener_displaydate)
<!DOCTYPE html>
<html>
<body>

<h2>JavaScript addEventListener()</h2>

<p>此示例使用 addEventListener() 方法将 click 事件附加到按钮。</p>

<button id="myBtn">试一试</button>

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

<script>
document.getElementById("myBtn").addEventListener("click", displayDate);

function displayDate() {
  document.getElementById("demo").innerHTML = Date();
}
</script>

</body>
</html>
运行结果: