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How To Display Error Message In Javascript With Alert

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only takes a minute: Sign up javascript: how to display script errors in a popup alert? up vote 17 down vote favorite 6 I want to display script errors in a popup alert instead of showing them in the browser javascript alert yes no console. window.onerror = function() { var message = /* get error messages and put them here */; alert(message); return true; }; javascript error-handling share|improve this question edited Apr 9 '10 at 3:56 DVK 81.2k20155256 asked Apr 9 '10 at 3:44 powerboy 2,90394275 2 Note that the onerror event is only supported by IE and Mozilla. –CMS Apr 9 '10 at 4:01 1 So is there a cross-browser solution? I mean, a similar function supported by webkit –powerboy Apr 9 jquery alert box '10 at 4:05 1 You mean there are browsers other than IE and Mozilla??? Dang! I need to get out more :) –DVK Apr 9 '10 at 4:10 Actually it'll be supported (hopefully soon) in WebKit - see phwinfo.com/forum/comp-lang-javascript/… –DVK Apr 9 '10 at 4:12 yep! But I got another problem. Seems that onerror only support those 3 parameters. There is no way to catch an error of a specific name. –powerboy Apr 9 '10 at 4:30 | show 1 more comment 4 Answers 4 active oldest votes up vote 27 down vote accepted Yes, that is the correct way. See the reference here: http://www.javascriptkit.com/javatutors/error2.shtml And explanation of how to see more details of the error here: http://www.javascriptkit.com/javatutors/error3.shtml Their example: 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. Since the errors occue 1 by 1, you need to do the following: have window.onerror handler store error details in some array Check that array periodically - either via a timer, or on every N'th call of window.onerror handler, or both. When the check happens, process entire array, display contents as desired, and empty out an array share|improve this answer edited Apr 9 '10 at 3:56 answered Apr 9 '10 at 3:50 DVK 81.2k20155256 Thx! So the answer is: window.onerror =

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