javascript：如何在弹出式警报中显示脚本错误？
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javascript: how to display script errors in a popup alert?
提问by powerboy
I want to display script errors in a popup alert instead of showing them in the browser console.
我想在弹出式警报中显示脚本错误，而不是在浏览器控制台中显示它们。
window.onerror = function() {
var message = /* get error messages and put them here */;
alert(message);
return true;
};
回答by DVK
Yes, that is the correct way.
是的，这是正确的方法。
See the reference here:
请参阅此处的参考：
http://www.javascriptkit.com/javatutors/error2.shtml
http://www.javascriptkit.com/javatutors/error2.shtml
And explanation of how to see more details of the error here:
以及如何在此处查看错误的更多详细信息的说明：
http://www.javascriptkit.com/javatutors/error3.shtml
http://www.javascriptkit.com/javatutors/error3.shtml
Their example:
他们的例子：
window.onerror = function(msg, url, linenumber) {
alert('Error message: '+msg+'\nURL: '+url+'\nLine Number: '+linenumber);
return true;
}
If you wish to display a LIST of errors in a single pop-up, it's trickier.
如果您希望在单个弹出窗口中显示错误列表，则比较棘手。
Since the errors occue 1 by 1, you need to do the following:
由于错误是 1 个 1 个，因此您需要执行以下操作：
- have
window.onerrorhandler store error details in some array Check that array periodically - either via a timer, or on every N'th call of
window.onerrorhandler, or both.When the check happens, process entire array, display contents as desired, and empty out an array
- 让
window.onerror处理程序在某个数组中存储错误详细信息 定期检查该数组 - 通过计时器，或在每次第 N 次调用
window.onerror处理程序时，或两者兼而有之。检查发生时，处理整个数组，根据需要显示内容，并清空数组
回答by user1398498
Just in case someone would like to use it with jQuery:
以防万一有人想将它与 jQuery 一起使用：
$(window).on("error", function(evt) {
console.log("jQuery error event:", evt);
var e = evt.originalEvent; // get the javascript event
console.log("original event:", e);
if (e.message) {
alert("Error:\n\t" + e.message + "\nLine:\n\t" + e.lineno + "\nFile:\n\t" + e.filename);
} else {
alert("Error:\n\t" + e.type + "\nElement:\n\t" + (e.srcElement || e.target));
}
});
回答by Adriaan Stander
Have a look at The onerror event of the window object, specifically Getting additional details on an error
回答by Bialecki
Check this out: http://www.javascriptkit.com/javatutors/error3.shtml. Looks like signature is function(message, url, linenumber).
看看这个：http: //www.javascriptkit.com/javatutors/error3.shtml。看起来签名是function(message, url, linenumber)。
回答by user8188295
<script>$(window).on("error", function(evt) {
console.log("jQuery error event:", evt);
var e = evt.originalEvent; // get the javascript event
console.log("original event:", e);
if (e.message) {
alert("Error:\n\t" + e.message + "\nLine:\n\t" + e.lineno + "\nFile:\n\t" + e.filename);
} else {
alert("Error:\n\t" + e.type + "\nElement:\n\t" + (e.srcElement || e.target));
}
});
</script>
