javascript - 从浏览器中隐藏 Javascript 错误消息

Question

我在其中一个问题上找到了这个代码示例；

window.onerror = function (msg, url, linenumber) {  

 //make ajax call with all error details and log error directly into the elmah database

 //show friendly error msg here to user

 //hide error from browser
 return true; 
}

“从浏览器中隐藏错误” 是什么意思，我该怎么做？

我不知道有这样的东西存在，我用 try-catch block 试了一下。发生错误后，我意识到浏览器仍然显示错误。如何隐藏浏览器错误？

更新

我尝试了以下代码并将其放入我所有页面的头部部分，但注意到发生了；

<script type="text/javascript">

(function () {

    window.onerror = function myErrorHandler(errorMsg, url, lineNumber) {

        alert(errorMsg);

        // Just let default handler run.
        return true;
    }

})();

</script>

Answer 1

使用:try...catch

function message()
{
    try
    {
        adddlert("Welcome guest!");
    }
    catch (err)
    {
        txt = "There was an error on this page.\n\n";
        txt += "Error description: " + err.description + "\n\n";
        txt += "Click OK to continue.\n\n";
        alert(txt);
    }
}

更多:https://developer.mozilla.org/en/JavaScript/Reference/Statements/try...catch