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stacktrace-gps
Advanced tools
Readme
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.
This is primarily a browser-centric library, but can be used with node.js. See the Offline Usage section below.
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)
With a bit of preparation, you can use this library offline in any environment. Any encountered fileNames not in the cache return resolved Promises with the original StackFrame. StackTraceGPS will make a best effort to provide as good of response with what is given and will fallback to the original StackFrame if nothing better could be found.
var stack = ErrorStackParser.parse(new Error('boom'));
console.assert(stack[0] == new StackFrame({fileName: 'http://localhost:9999/file.min.js', lineNumber: 1, columnNumber: 32}));
var sourceCache = {'http://localhost:9999/file.min.js': 'var foo=function(){};function bar(){}var baz=eval("XXX");\n//# sourceMappingURL=file.js.map'};
var sourceMap = '{"version":3,"sources":["./file.js"],"sourceRoot":"http://localhost:4000/","names":["foo","bar","baz","eval"],"mappings":"AAAA,GAAIA,KAAM,YACV,SAASC,QACT,GAAIC,KAAMC,KAAK","file":"file.min.js"}';
var sourceMapConsumerCache = {'http://localhost:4000/file.js.map': new SourceMap.SourceMapConsumer(sourceMap)};
var gps = new StackTraceGPS({offline: true, sourceCache: sourceCache, sourceMapConsumerCache: sourceMapConsumerCache});
gps.pinpoint(stack[0]).then(function(betterStackFrame) {
console.assert(betterStackFrame === new StackFrame({functionName: 'bar', fileName: 'http://localhost:9999/file.js', lineNumber: 2, columnNumber: 9}));
});
npm install stacktrace-gps
bower install stacktrace-gps
https://raw.githubusercontent.com/stacktracejs/stacktrace-gps/master/dist/stacktrace-gps.min.js
new StackTraceGPS(/*optional*/ options)
=> StackTraceGPSoptions: Object
true
to prevent all network requests.pinpoint(stackframe)
=> Promise(StackFrame)Enhance function name and use source maps to produce a better StackFrame.
.findFunctionName(stackframe)
=> Promise(StackFrame)Enhance function name and use source maps to produce a better StackFrame.
.getMappedLocation(stackframe)
=> Promise(StackFrame)Enhance function name and use source maps to produce a better StackFrame.
Functions that rely on Source Maps
(pinpoint
and getMappedLocation
) require recent browsers.
Want to be listed as a Contributor? Start with the Contributing Guide!
FAQs
Turns partial code location into precise code location
The npm package stacktrace-gps receives a total of 1,974,094 weekly downloads. As such, stacktrace-gps popularity was classified as popular.
We found that stacktrace-gps demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 4 open source maintainers collaborating on the project.
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