html运行实例（jsck_element_addeventlistener

代码示例：（标识：jsck_element_addeventlistener_1）

<!DOCTYPE html>
<html>
<body>

<h1>Element 对象</h1>

<h2>addEventListener() 方法</h2>

<p>将 click 事件附加到按钮：</p>

<button id="myBtn">试一试</button>

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

<script>
const element = document.getElementById("myBtn");
element.addEventListener("click", function() {
  document.getElementById("demo").innerHTML = "Hello World";
});
</script>

</body>
</html>