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stackback

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  • License MIT

return list of CallSite objects from a captured stacktrace

Package Exports

  • stackback

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (stackback) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

stackback

Returns an array of CallSite objects for a captured stacktrace. Useful if you want to access the frame for an error object.

use

var stackback = require('stackback');

// error generated from somewhere
var err = new Error('some sample error');

// stack is an array of CallSite objects
var stack = stackback(err);

CallSite object

From the V8 StackTrace API

The structured stack trace is an Array of CallSite objects, each of which represents a stack frame. A CallSite object defines the following methods

getThis: returns the value of this
getTypeName: returns the type of this as a string. This is the name of the function stored in the constructor field of this, if available, otherwise the object's [[Class]] internal property.
getFunction: returns the current function
getFunctionName: returns the name of the current function, typically its name property. If a name property is not available an attempt will be made to try to infer a name from the function's context.
getMethodName: returns the name of the property of this or one of its prototypes that holds the current function
getFileName: if this function was defined in a script returns the name of the script
getLineNumber: if this function was defined in a script returns the current line number
getColumnNumber: if this function was defined in a script returns the current column number
getEvalOrigin: if this function was created using a call to eval returns a CallSite object representing the location where eval was called
isToplevel: is this a toplevel invocation, that is, is this the global object?
isEval: does this call take place in code defined by a call to eval?
isNative: is this call in native V8 code?
isConstructor: is this a constructor call?

install

npm install stackback