stacktrace.js v2.0 is out, featuring ES6 support, better stack frames, and more!
: A formal evening at a mansion where three couples share their various sexual fantasies. These stories are depicted through stylized vignettes.
—to challenge patriarchal hierarchies that excluded women from "high art" history. Essentialism vs. Inclusivity:
For the first time, young feminists saw the scale of their buried history. Elderly women wept at the setting for Sacajawea. Lesbian activists held quiet vigils at the setting for Sappho. And the museum installed "quiet rooms" where visitors could process their emotional reactions—a first for a contemporary art show.
The narrative centers on Johnny (played by Mike Starr), the proprietor of a delicatessen in Yonkers. Johnny is currently in a dire financial situation, having lost a significant amount of money gambling. His stress is compounded by the looming threat of a local mob figure to whom he owes money.
: The table sits upon a floor of white porcelain tiles inscribed in gold with the names of 999 additional women , grounding the 39 guests in a vast, collective history of female achievement. Artistic and Cultural Impact
More than meets the eye
5 tools in 1!
stacktrace.js - instrument your code and generate stack traces
stacktrace-gps - turn partial code location into precise code location
In 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.
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 now
var error = new Error('Boom');
printStackTrace({e: error});
==> Array[String]
v1.x:
var error = new Error('Boom');
StackTrace.fromError(error).then(callback).catch(errback);
==> Promise(Array[StackFrame], Error);
If this is all you need, you don't even need the full stacktrace.js library! Just use error-stack-parser!
ErrorStackParser.parse(new Error('boom'));
Use Case: Give me a trace anytime this function is called
Instrumenting now takes Function references instead of Strings.
v0.x:
function interestingFn() {...};
var p = new printStackTrace.implementation();
p.instrumentFunction(this, 'interestingFn', logStackTrace);
==> Function (instrumented)
p.deinstrumentFunction(this, 'interestingFn');
==> Function (original)
v1.x:
function interestingFn() {...};
StackTrace.instrument(interestingFn, callback, errback);
==> Function (instrumented)
StackTrace.deinstrument(interestingFn);
==> Function (original)
The Dinner Party -1994- [portable] May 2026
.parseError()
Error: Error message
at baz (http://url.com/file.js:10:7)
at bar (http://url.com/file.js:7:17)
at foo (http://url.com/file.js:4:17)
at http://url.com/file.js:13:21
Parsed Error
.get()
function foo() {
console.log('foo');
bar();
}
function bar() {
baz();
}
function baz() {
function showTrace(stack) {
var event = new CustomEvent('st:try-show', {detail: stack});
document.body.dispatchEvent(event);
}
function showError(error) {
var event = new CustomEvent('st:try-error', {detail: error});
document.body.dispatchEvent(event);
}
StackTrace.get()
.then(showTrace)
.catch(showError);
}
foo();
StackTrace output
The Dinner Party -1994- [portable] May 2026
: A formal evening at a mansion where three couples share their various sexual fantasies. These stories are depicted through stylized vignettes.
—to challenge patriarchal hierarchies that excluded women from "high art" history. Essentialism vs. Inclusivity:
For the first time, young feminists saw the scale of their buried history. Elderly women wept at the setting for Sacajawea. Lesbian activists held quiet vigils at the setting for Sappho. And the museum installed "quiet rooms" where visitors could process their emotional reactions—a first for a contemporary art show.
The narrative centers on Johnny (played by Mike Starr), the proprietor of a delicatessen in Yonkers. Johnny is currently in a dire financial situation, having lost a significant amount of money gambling. His stress is compounded by the looming threat of a local mob figure to whom he owes money.
: The table sits upon a floor of white porcelain tiles inscribed in gold with the names of 999 additional women , grounding the 39 guests in a vast, collective history of female achievement. Artistic and Cultural Impact
The Dinner Party -1994- [portable] May 2026
Turn partial code location into precise code location
This library accepts a code location (in the form of a StackFrame) and returns a new StackFrame with a more accurate location (using source maps) and guessed function names.
Usage
var stackframe = new StackFrame({fileName: 'http://localhost:3000/file.min.js', lineNumber: 1, columnNumber: 3284});
var callback = function myCallback(foundFunctionName) { console.log(foundFunctionName); };
// Such meta. Wow
var errback = function myErrback(error) { console.log(StackTrace.fromError(error)); };
var gps = new StackTraceGPS();
// Pinpoint actual function name and source-mapped location
gps.pinpoint(stackframe).then(callback, errback);
//===> Promise(StackFrame({functionName: 'fun', fileName: 'file.js', lineNumber: 203, columnNumber: 9}), Error)
// Better location/name information from source maps
gps.getMappedLocation(stackframe).then(callback, errback);
//===> Promise(StackFrame({fileName: 'file.js', lineNumber: 203, columnNumber: 9}), Error)
// Get function name from location information
gps.findFunctionName(stackframe).then(callback, errback);
//===> Promise(StackFrame({functionName: 'fun', fileName: 'http://localhost:3000/file.min.js', lineNumber: 1, columnNumber: 3284}), Error)
Simple, cross-browser Error parser. This library parses and extracts function names, URLs, line numbers, and column numbers from the given Error's stack as an Array of StackFrames.
Once you have parsed out StackFrames, you can do much more interesting things. See stacktrace-gps.
Note that in IE9 and earlier, Error objects don't have enough information to extract much of anything. In IE 10, Errors are given a stack once they're thrown.