onerrorexample4.htm

来自「JavaScript程 序 设 计 之 设 计 的源代码。」· HTM 代码 · 共 18 行

HTM
18
字号
<html>
    <head>
        <title>OnError Example</title>
        <script type="text/javascript">
            alert("Syntax error.";
            window.onerror = function (sMessage, sUrl, sLine) {
                alert("An error occurred:\n" + sMessage + "\nURL: " + sUrl + "\nLine Number: " + sLine);
                return true;
            }
        </script>
    </head>
    <body onload="nonExistentFunction()">
        <p>The syntax error in this page occurs before the <code>onerror</code>
        event handler is assigned, therefore the browser intercepts the error
        and the custom error message isn't displayed.</p>
    </body>
</html>

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