原文地址: Javascript中点击(click)事件的3种写法

方法一:

<!DOCTYPE html>
<html>
  <head>
    <title>Javascript中点击事件方法一</title>
  </head>
  <body>
    <button id="btn">click</button>

    <script type="text/javascript">
      var btn = document.getElementById("btn");
      btn.onclick = function() {
        alert("hello world");
      }
    </script>
  </body>
</html>

消除事件:btn.οnclick=null;

方法二:

<!DOCTYPE html>
<html>
  <head>
    <title>Javascript中点击事件方法二</title>
  </head>
  <body>
    <button id="btn">click</button>
    <script type="text/javascript">
      var btn = document.getElementById("btn");
      btn.addEventListener('click', function() {
        alert("hello wrold");
      }, false)
    </script>
  </body>
</html>

方法三:

<!DOCTYPE html>
<html>
<head>
  <title>Javascript中点击事件方法三</title>
  <script type="text/javascript">
    function test() {
      alert("hello world");
    }
  </script>
</head>
<body>
  <button id="btn" onclick="test()">click</button>
</body>
</html>

 

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Javascript中点击(click)事件的3种写法