auchenberg / stacktrace-gps

Turns partial code location into precise code location

stacktrace-gps - 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(undefined, [], 'http://localhost:3000/file.min.js', 1, 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('fun', [], 'file.js', 203, 9), Error)

// Better location/name information from source maps
gps.getMappedLocation(stackframe).then(callback, errback);
=> Promise(StackFrame(undefined, [], 'file.js', 203, 9), Error)

// Get function name from location information
gps.findFunctionName(stackframe).then(callback, errback);
=> Promise(StackFrame('fun', [], 'http://localhost:3000/file.min.js', 1, 3284), Error)

Installation

npm install stacktrace-gps
bower install stacktrace-gps
https://raw.githubusercontent.com/stacktracejs/stacktrace-gps/master/dist/stacktrace-gps.min.js

API

new StackTraceGPS(/*optional*/ options) => StackTraceGPS

options: Object

• sourceCache: Object (String URL => String Source) - Pre-populate source cache to avoid network requests
• offline: Boolean (default false) - Set to true to prevent all network requests

.pinpoint(stackframe) => Promise(StackFrame)

Enhance function name and use source maps to produce a better StackFrame.

• stackframe - StackFrame or like object e.g. {fileName: 'path/to/file.js', lineNumber: 100, columnNumber: 5}

.findFunctionName(stackframe) => Promise(StackFrame)

Enhance function name and use source maps to produce a better StackFrame.

• stackframe - StackFrame or like object

.getMappedLocation(stackframe) => Promise(StackFrame)

Enhance function name and use source maps to produce a better StackFrame.

• stackframe - StackFrame or like object

Browser Support

Functions that rely on Source Maps (pinpoint and getMappedLocation) require recent browsers:

• Chrome 20+
• Firefox 23+
• Safari 8+
• Opera 24+
• IE 9+
• iOS 7+
• Android 4.2+

Contributing

Want to be listed as a Contributor? Start with the Contributing Guide!

License

This project is licensed to the Public Domain