Jscript Error Line Number
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Nodejs Try Catch Line Number
Web technology For developers JavaScript JavaScript reference Standard built-in objects Error Error.prototype.lineNumber Your Search Results Driptap tjcrowder fscholz Mingun paul.irish Error.prototype.lineNumber In This Article ExamplesUsing lineNumberAlternative example using error eventSpecificationsBrowser compatibilitySee also Non-standard This feature is non-standard and is not on a standards track. Do not use it on production sites facing javascript exception line number the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future. The lineNumber property contains the line number in the file that raised this error. Examples Using lineNumber var e = new Error('Could not parse input'); throw e; console.log(e.lineNumber) // 2 Alternative example using error event window.addEventListener('error', function(e) { console.log(e.lineNumber); // 5 }); var e = new Error('Could not parse input'); throw e; This is not a standard feature and lacks widespread support. See the browser compatability table below. Specifications Not part of any specification. Non-standard. Browser compatibility Desktop Mobile Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari Basic support No support (Yes) No support No support No support Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile Basic support No support No support (Yes) No support No support No support See also Error.prototype.stack Error.prototype.columnNumber Error.prototype.fileName Document Tags and Contributors Tags: Error
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helping each other. Join them; it only takes a minute: Sign up JavaScript exception handling - displaying the line number up vote 21 down vote favorite 2 When catching / handling exceptions in JavaScript, how can I determine https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/lineNumber what the call stack was when the exception occurred? (and also if possible what the line number was) try { // etc... } catch (ex) { // At this point here I want to be able to print out a detailed exception // message, complete with call stack, and if possible line numbers. } javascript exception-handling callstack share|improve this question asked Dec 14 '09 at 13:45 Justin 54.3k34151279 add a comment| 3 Answers 3 active oldest http://stackoverflow.com/questions/1901012/javascript-exception-handling-displaying-the-line-number votes up vote 14 down vote accepted Each browser handles this differently, so there isn't a universal way to do it. This blog post has some good code to dump a stack trace for most supported browsers. I don't think there is a good way to provide the line number. If you're looking to debug one function in particular, Firebug has a good stack trace function (vis console.trace()). share|improve this answer answered Dec 14 '09 at 13:52 Chris Clark 1,75611220 Of course, FireBug! –Upperstage Dec 14 '09 at 14:50 1 That blog is pretty old(2008). There's got to be a better way. –RayLoveless Jun 10 '14 at 22:59 blog post is dead... –Ryan Ahearn Aug 29 '14 at 13:56 add a comment| Did you find this question interesting? Try our newsletter Sign up for our newsletter and get our top new questions delivered to your inbox (see an example). Subscribed! Success! Please click the link in the confirmation email to activate your subscription. up vote 10 down vote Have a look at this. A way to analyse the available information: try { doInit(); } catch(err) { var vDebug = ""; for (var prop in err) { vDebug += "property: "+ prop+ " value: ["+ err[prop]+ "]\n"; } vDebug += "toString(): " + " value: [" + err.toString() + "]"; status.rawValue = vD
need to throw an exception and get the line number and the call stack in JavaScript, specially when we are developing a feature that will be used http://www.jomendez.com/2015/02/25/throw-error-line-number-javascript/ by other developers. Since JavaScript have far less tools to aid in debugging than other languages, when we are building a functionality it is handy to throw an exception when the http://www.htmlgoodies.com/html5/javascript/browser-specific-error-catching-in-javascript.html developer that is using you code need to meet certain requirements. For example: function someFunction(callback){ if(typeof callback != ‘function’){ // throw an exception here }else{ callback(); } } With this code we line number can achieve it: var err; try { throw new Error('myError'); } catch (e) { err = e; } if (!!err) console.log(err.stack); if you put this code in the console (chrome) this is the result: Error: myError at :4:11 at Object.InjectedScript._evaluateOn (:777:140) at Object.InjectedScript._evaluateAndWrap (:710:34) at Object.InjectedScript.evaluate (:626:21) This is the code wrapped in a function to enable re-utilization: Compatibility by Mozilla Descktop compatibility: Feature error line number Chrome Firefox (Gecko) Internet Explorer Opera Safari Basic support (Yes) (Yes) 10 (Yes) 6 Mobile compatibility: Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile Basic support Android 4 (perhaps Android 3, but not Android 2) ? ? ? ? 6 Leave a comment Post navigation « Optimizing code using Object.defineProperty instead of $scope for $watch in AngularJs What’s coming in EcmaScript 6 Part 1 » Leave a Reply Cancel reply Your email address will not be published. Required fields are marked * Name * Email * Website nine × nine = Comment Yes, add me to your mailing list. Search Recent Posts: CSS Tooltip, without JavaScript or Jquery Prevent angular executing controller twice (Mini-Challenge 11) How to avoid js files cache script bundle with razor State Management in ASP.Net ASP.NET MVC Routers common questions Archives June 2016(2) May 2016(2) February 2016(1) January 2016(1) December 2015(2) November 2015(4) October 2015(6) September 2015(1) July 2015(2) June 2015(4) May 2015(8) March 2015(1) February 2015(10) July 2014(3) CategoriesCategories Select Category AngularJS ASP.NET Best-Practices C# Interview-Questions JavaScript Microsoft Certification Exam mini-challenges Protractor Subscribe to our New
- sql HTML & Graphics Tutorials getting started backgrounds buttons browser specific colors forms frames html 4.01 tags html 4.01 ref image maps tables web graphics Beyond HTML asp cascading style sheets css keyword ref cgi scripting developer research center dhtml/layers dot net java applets javascript javascript frameworks javascript keyword ref javascript script tips mobile web development open source cms php security SEO vb script keyword ref webmaster tips webmaster projects webmaster toolbox video xml general reference pieces the master list Need Help? discussion boards mentors HTML Goodies : HTML5 : HTML5 and JavaScript Post a comment Email Article Print Article Share Articles Reddit Facebook Twitter del.icio.us Digg Slashdot DZone StumbleUpon FriendFeed Furl Newsvine Google LinkedIn MySpace Technorati YahooBuzz Browser-specific Error Catching in JavaScript By Robert Gravelle Tweet There are many compelling reasons why error handling should play an integral part in your application development. The JavaScript Error Handling: Why You Need it article outlined some of the major reasons why you need to consider error handling sooner rather than later in a Web application's development cycle. Everyone knows that error handling is important, but to what end? In fact, error handling plays many roles, from reassuring the end-users, to helping identify trouble spots in an application, to siphoning off potential security holes in the code. In this installment on error handling in JavaScript, we'll be taking a look at how to code your exception handling in JavaScript in a way that takes browser discrepancies into account. Anatomy of the Try/Catch Block In all browsers, the mechanism of choice for trapping errors is the Try/Catch block. As the name suggest, the Try/Catch Block is made up of two sections. The try {} encloses code in which to trap exceptions; the catch {} sect