我们使用window.onerror来捕获未处理的异常（为开发团队记录它们，并显示友好的用户警报）。最近我们注意到，在谷歌浏览器中，如果错误消息超过一定长度，则会将其截断，并且文本“...<omitted>...”被神秘地添加到错误消息中。
以下代码将演示此功能（在Chrome版本33.0.1750中）。我想知道是否有其他人遇到过这个问题？
<html>
<head>
<script type="text/javascript">
window.onerror = function (errorMsg, url, lineNumber) {
alert('Error: ' + errorMsg);
}
var throwError = function () {
throw new Error(
'Something went wrong. Something went wrong. Something went wrong. Something went wrong. ' +
'Something went wrong. Something went wrong. Something went wrong. Something went wrong. ' +
'Something went wrong. Something went wrong. Something went wrong. Something went wrong. ' +
'Some text gets truncated before this point!');
}
</script>
</head>
<body>
<h1>Hello World</h1>
<input type="button" onclick="throwError()" value="Throw uncaught error!" /><br /><br />
</body>
</html>
答案 0 :(得分：24)
我找到了一个效果很好的解决方案。
Chrome实施新的HTML标准，其中2个新参数已添加到 onerror 处理程序，即： colNumber 和错误对象< / strong>（包括堆栈跟踪）。
请参阅：
根据下面的代码示例，可以通过error.message访问完整的错误消息。这是第一个参数message的副本，似乎Chrome决定截断message。不知道为什么他们不得不打破一些有效的东西...： - （
IE和FireFox（截至目前版本：11.0.9600和26.0）尚未实施新的5参数标准，因此代码可以考虑这一点。
希望这有助于某人！
代码示例返回完整错误消息：
<html>
<head>
<script type="text/javascript">
//Chrome passes the error object (5th param) which we must use since it now truncates the Msg (1st param).
window.onerror = function (errorMsg, url, lineNumber, columnNumber, errorObject) {
var errMsg;
//check the errorObject as IE and FF don't pass it through (yet)
if (errorObject && errorObject !== undefined) {
errMsg = errorObject.message;
}
else {
errMsg = errorMsg;
}
alert('Error: ' + errMsg);
}
var throwError = function () {
throw new Error(
'Something went wrong. Something went wrong. Something went wrong. Something went wrong. ' +
'Something went wrong. Something went wrong. Something went wrong. Something went wrong. ' +
'Something went wrong. Something went wrong. Something went wrong. Something went wrong. ' +
'Text does not get truncated! :-)');
}
</script>
</head>
<body>
<h1>Hello World</h1>
<input type="button" onclick="throwError()" value="Throw uncaught error!" /><br /><br />
</body>
答案 1 :(得分：3)
这是Chrome中的已知问题，已被其他人注意到：https://github.com/angular/angular.js/issues/5568。
我认为没有解决方法，但已经报告了错误：http://crbug.com/331971