tryjsref_element_addeventlistener2 在线代码实例

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>W3Cschool教程(w3cschool.cn)</title>
</head>
<body>
<p>用户点击后使用 addEventListener() 方法来执行函数。</p>
<button id="myBtn">点我</button>
<p id="demo">
<script>
document.getElementById("myBtn").addEventListener("click", myFunction);
function myFunction() {
    document.getElementById("demo").innerHTML = "Hello World";
}
</script>
</body>
</html>
 
 
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运行结果
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