Javascript Error Call Stack
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Error Stack Trace Javascript
Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each javascript print stack trace to console other. Join them; it only takes a minute: Sign up in javascript get the callstack that lead to error up vote 3 down vote favorite The problem is not getting the callstack in general, which can be done
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as described here: http://eriwen.com/javascript/js-stack-trace/ but rather in accessing the callstack that triggered the event, from the handler of the event. In particular I'm interested in logging the callstack from the window error event window.onerror = function(msg, url, line) { //callstack // would be nice to have. //log callstack or whatever. (note this can be done w/ ajax and service, and is not the question at hand. } but I do know how to log the error. (I stacktrace.js printstacktrace use jquery's .ajax, and a service) Will browsers make this possible ever? Is it currently possible? Maybe I am going about this the wrong way. How can I add a simple function (i.e. not modify all the functions in my codebase) to detect whenever there is an error, and also log the call stack. Thanks for the answers so far and sorry if the question was initially poorly worded. javascript error-handling callstack share|improve this question edited Feb 20 '12 at 18:21 asked Feb 20 '12 at 16:55 user420667 2,17683057 add a comment| 2 Answers 2 active oldest votes up vote 6 down vote The Error object has a non-standard stack property on Mozilla, it seems to work in Google Chrome too, not IE9. function test() { try {//can't think of anything that causes an exception? throw new Error("boo"); } catch(e) { alert(e.stack); } } test(); See the fiddle: http://jsfiddle.net/Cq5RJ/ share|improve this answer answered Feb 20 '12 at 17:23 gideon 15.1k54893 1 More info : bugzilla.mozilla.org/show_bug.cgi?id=355430 –Bartosz Grzybowski Feb 20 '12 at 17:29 +1 Was just going to post that a try/catch would be your best bet. –Bot Feb 20 '12 at 17:35 but how can I try/catch every function? I suppose I could modify Function.prototype to be wrapped somehow in a try catch block? –user420667 Feb 20 '12 at 17:43 also, thanks, bu
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Javascript Error Stack Undefined
Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, stacktrace.js angular helping each other. Join them; it only takes a minute: Sign up How to print a stack trace in Node.js? up vote 300 down vote favorite 58 Does anyone know how to print a stack trace in Node.js? http://stackoverflow.com/questions/9365065/in-javascript-get-the-callstack-that-lead-to-error javascript node.js stack-trace share|improve this question edited Dec 12 '15 at 14:33 Zanon 4,20283147 asked May 27 '10 at 18:35 mike.toString 1,501293 add a comment| 7 Answers 7 active oldest votes up vote 383 down vote Any Error object has a stack member that traps the point at which it was constructed. var stack = new Error().stack console.log( stack ) or more simply: console.trace("Here I am!") share|improve this answer edited Mar 7 '12 at 17:01 answered May http://stackoverflow.com/questions/2923858/how-to-print-a-stack-trace-in-node-js 28 '10 at 20:45 isaacs 10.3k23030 1 or just sys.puts(new Error().stack) (after adding the system module) –sirhc Aug 9 '10 at 4:48 4 As of now, sys is depricated. It is replaced by 'util'. –Pindatjuh Apr 14 '11 at 18:15 5 +1 for also showing new Error().stack, which works in cases where you don't want to involve the console. –Eugene Beresovsky Jul 31 '12 at 4:19 1 One advantage of trace is it shows the current line/context as well which stack does not. The info is in the error object if you want to manually create that line I guess. –studgeek Aug 30 '12 at 16:54 75 console.log(err.stack) and console.trace() do not give you same results. Whereas err.stack gives you the stack trace for the err object itself (functioning the way we all normally think of exceptions), console.trace() will print out the call stack at the point where console.trace() is being called. So if you catch some error being thrown by some deeper layer of code, console.trace() will not contain that deeper layer code in the stack trace since that code is no longer on the stack. However, console.log(err.stack) will contain the deeper layers as long as it threw an Error object. –user1334007 Feb 21 '13 at 18:10 add a comment| up vote 134 down vote Now there's a dedicated function
DocsQuick StartInstall stacktrace.jsAvailable via npm, bower or component(1). You can also download minified or development versions directly from GitHub. npm install stacktrace-js bower install stacktrace-js //cdnjs.com/libraries/stacktrace.jsTrace from anywhereYou don't have to https://www.stacktracejs.com/ catch an Error. You can instrument functions or just call StackTrace.get() wherever you feel like it! StackTrace.fromError(error) .then(console.log); StackTrace.get() .then(function(stack){}) .catch(function(err){});Enhance and reportTake advantage of our source-map support and other static analysis, then send stack traces to your server from your users. var stackframes = [...]; var url = 'https://yourapp.com/path'; StackTrace.report(stackframes, url);More than meets the javascript error eye5 tools in 1!stacktrace.js - instrument your code and generate stack tracesstacktrace-gps - turn partial code location into precise code locationerror-stack-parser - extract meaning from JS Errorsstack-generator - generate artificial backtrace in old browsersstackframe - JS Object representation of a stack frameNot just for ErrorsYou can use Stacktrace.get() anywhere! Try it next time you're tempted javascript error stack to use debugger;Use it during development when you want to understand what's calling a function. Just write StackTrace.instrument(interestingFn, callback, errback);See more in the docsFollow @stacktracejsDeveloped and maintained by Eric, Victor, Oliver and our gracious contributors.Code licensed to Public Domain, docs under CC BY 4.0Migrating from v0.x to v1.xIn version 1.x, We've switched from a synchronous API to an asynchronous one using Promises because synchronous ajax calls are deprecated and frowned upon due to performance implications.HEADS UP: StackTrace.JS does NOT provide a Promises polyfill by default, but we do distribute a version with polyfills! Check the Promises page on caniuse.com to determine if you need one.All methods now return stackframes. This Object representation is modeled closely after StackFrame representations in Gecko and V8. All you have to do to get stacktrace.js v0.x behavior is call .toString() on a stackframe.Use Case: Give me a trace from wherever I am right nowv0.x:printStackTrace(); => Array[String] v1.x:StackTrace.get().then(callback).catch(errback); => Promise(Array[StackFrame], Error) StackTrace.get() returns a PromiseUse Case: Parse this errorv0.x:var erro