Javascript Catch Error Line Number
Contents |
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies javascript get line number of this site About Us Learn more about Stack Overflow the company Business
Nodejs Try Catch Line Number
Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask node.js get current line number Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign
Node Error Line Number
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 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 try catch line number javascript 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 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| up vote 10 down vote Have a look at this. A way to analyse the available information: try
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting
Node Catch Error Line Number
ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join
Nodejs Get Error Line Number
the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes javascript get calling function a minute: Sign up How to get JavaScript caller function line number? How to get JavaScript caller source URL? up vote 75 down vote favorite 32 I am using the following for getting the JavaScript caller function name: var callerFunc = http://stackoverflow.com/questions/1901012/javascript-exception-handling-displaying-the-line-number arguments.callee.caller.toString(); callerFuncName = (callerFunc.substring(callerFunc.indexOf("function") + 8, callerFunc.indexOf("(")) || "anoynmous") Is there a way to discover the line number from which the method was called? Also, is there a way to get the name of the JavaScript file the method was called from? Or the source URL? javascript share|improve this question edited Mar 3 '14 at 21:07 Kara 3,16873147 asked Aug 27 '09 at 12:49 Tal 56331018 2 I don't think this is possible in IE, or else we would have a http://stackoverflow.com/questions/1340872/how-to-get-javascript-caller-function-line-number-how-to-get-javascript-caller way to get around there CRAPPY error messages that deliver no detail. But if it is possible I would LOVE to know as well! –Zoidberg Aug 27 '09 at 13:00 add a comment| 13 Answers 13 active oldest votes up vote 20 down vote accepted kangax's solution introduces unnecessary try..catch scope. If you need to access the line number of something in JavaScript (as long as you are using Firefox or Opera), just access (new Error).lineNumber. share|improve this answer answered Aug 28 '09 at 17:16 Eli Grey 22.8k105283 7 Hi, Thanks for that addon. do you know if its possible to get line number from previous call ? Lets say method A calls B , and now in B I would like to know in what line under A the call was made? –Tal Aug 30 '09 at 11:12 65 This is ticked, but doesn't answer the question, which is how to get the line number of the caller function. –mikemaccana Apr 17 '12 at 8:45 2 Also, this is extremely limited. The best solution is to throw an error and use regex on the error.stack which is available in all modern browsers. You can easily extract that path, file, line, and column. No problem. –arctelix Oct 4 '15 at 3:49 add a comment| up vote 62 down vote This works for me in chrome/QtWebView function getErrorObject(){ try { throw Error('') } catch(err) { return err; } } var er
References & Guides Learning web development Tutorials References Developer Guides Accessibility Game development ...more docs https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error Mozilla Docs Add-ons Firefox Developer ToolsFeedback Get Firefox help Get web development help Join the MDN community Report a content problem Report a bug Search https://blog.sentry.io/2016/01/04/client-javascript-reporting-window-onerror.html Search Languages Català (ca) Deutsch (de) Español (es) Français (fr) Bahasa Indonesia (id) 日本語 (ja) 한국어 (ko) Polski (pl) Português (do Brasil) (pt-BR) Русский (ru) 中文 (简体) line number (zh-CN) 正體中文 (繁體) (zh-TW) Add a translation Edit Advanced Advanced History Print this article MDN Web technology For developers JavaScript JavaScript reference Standard built-in objects Error Your Search Results ariyankhan josephmcasey AlexanderFradiani fscholz mondwan SphinxKnight janosch-x davidchase Mingun shawnacscott Sheppy ethertank Nickolay evilpie trevorh teoli davidbourguignon secoif DomenicDenicola dgchurchill timemachine3030 Sevenspade Potappo error line number Sephr Brettz9 Mgjbot Allanbonadio Ptak82 JustinLudwig Error In This Article SyntaxParametersDescriptionError typesPropertiesMethodsError instancesPropertiesStandard propertiesVendor-specific extensionsMicrosoftMozillaMethodsExamplesThrowing a generic errorHandling a specific errorCustom Error TypesSpecificationsBrowser compatibilitySee also The Error constructor creates an error object. Instances of Error objects are thrown when runtime errors occur. The Error object can also be used as a base object for user-defined exceptions. See below for standard built-in error types. Syntax new Error([message[, fileName[, lineNumber]]]) Parameters message Optional. Human-readable description of the error. fileName Optional. The value for the fileName property on the created Error object. Defaults to the name of the file containing the code that called the Error() constructor. lineNumber Optional. The value for the lineNumber property on the created Error object. Defaults to the line number containing the Error() constructor invocation. Description Runtime errors result in new Error objects being created and thrown. This page documents the use of the Error object itself and its use as a constr
to log client-side errors and report them to your servers. It’s also one of the major mechanisms by which Sentry’s client JavaScript integration (raven-js) works. You listen to the onerror event by assigning a function to window.onerror: window.onerror = function (msg, url, lineNo, columnNo, error) { // ... handle error ... return false; } When an error is thrown, the following arguments are passed to the function: msg – The message associated with the error, e.g. “Uncaught ReferenceError: foo is not defined” url – The URL of the script or document associated with the error, e.g. “/dist/app.js” lineNo – The line number (if available) columnNo – The column number (if available) error – The Error object associated with this error (if available) The first four arguments tell you in which script, line, and column the error occurred. The final argument, Error object, is perhaps the most valuable. Let’s learn why. The Error object and error.stack At first glance the Error object isn’t very special. It contains 3 standardized properties: message, fileName, and lineNumber. Redundant values that already provided to you via window.onerror. The valuable part is a non-standard property: Error.prototype.stack. This stack property tells you at what source location each frame of the program was when the error occurred. The stack trace can be a critical part of debugging an error. And despite being non-standard, this property is available in every modern browser. Here’s an example of the Error object’s stack property in Chrome 46: "Error: foobar\n at new bar (