JavaScript 阻止事件的默认行为

1、右键点击
document.oncontextmenu = function(){
    return false;
}
 
2、a链接默认行为
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script>
        window.onload = function() {
            var aLink = document.getElementById('a1');
            /* aLink.onclick = function() {
                return false;
            } */

            aLink.onclick = function(ev) {
                var e = ev || window.event;
                preDefault(e);
                console.log('asdf');
            }

            // e.preventDefault; 阻止默认行为，可以放在任何地方 W3C
            // window.event.returnValue = false;  兼容ie浏览器

            function preDefault(e) {
                if (e.preventDefault) {
                    e.preventDefault();
                } else {
                    window.event.returnValue = false;
                }
            }
        }
    </script>
</head>
<body>
    <a id="a1" href="https://www.baidu.com">百度</a>
</body>
</html>

 

posted @ 2021-02-22 22:54  独孤靖云  阅读(438)  评论(0)  编辑  收藏  举报