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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Boxes Javascript - Void Keyword Javascript - Page Printing JavaScript Objects Javascript - Objects Javascript - Number Javascript - Boolean Javascript - Strings Javascript - Arrays Javascript - http://stackoverflow.com/questions/2604976/javascript-how-to-display-script-errors-in-a-popup-alert Date Javascript - Math Javascript - RegExp Javascript - HTML DOM JavaScript Advanced Javascript - Error Handling Javascript - Validations Javascript - Animation Javascript - Multimedia Javascript - Debugging Javascript - Image Map Javascript - Browsers IMS DB Resources Javascript - Questions And Answers Javascript - Quick Guide Javascript - Functions Javascript - Resources Selected https://www.tutorialspoint.com/javascript/javascript_dialog_boxes.htm Reading Developer's Best Practices Questions and Answers Effective Resume Writing HR Interview Questions Computer Glossary Who is Who JavaScript - Dialog Boxes Advertisements Previous Page Next Page JavaScript supports three important types of dialog boxes. These dialog boxes can be used to raise and alert, or to get confirmation on any input or to have a kind of input from the users. Here we will discuss each dialog box one by one. Alert Dialog Box An alert dialog box is mostly used to give a warning message to the users. For example, if one input field requires to enter some text but the user does not provide any input, then as a part of validation, you can use an alert box to give a warning message. Nonetheless, an alert box can still be used for friendlier messages. Alert box gives only one button "OK" to select and proceed. Example