tryjs_try_catch 在线代码实例

实例代码( Tip: 登录后体验更佳 )

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>W3Cschool教程(w3cschool.cn)</title>
<script>
var txt="";
function message(){
    try {
        adddlert("Welcome guest!");
    }
    catch(err) {
        txt="本页有一个错误。\n\n";
        txt+="错误描述：" + err.message + "\n\n";
        txt+="点击确定继续。\n\n";
        alert(txt);
    }
}
</script>
</head>
<body>
<input type="button" value="查看消息" onclick="message()" />
</body>
</html>
 
 
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运行结果
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