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+# stack-trace
+
+Get v8 stack traces as an array of CallSite objects.
+
+## Install
+
+``` bash
+npm install stack-trace
+```
+
+## Usage
+
+The stack-trace module makes it easy for you to capture the current stack:
+
+``` javascript
+var stackTrace = require('stack-trace');
+var trace = stackTrace.get();
+
+require('assert').strictEqual(trace[0].getFileName(), __filename);
+```
+
+However, sometimes you have already popped the stack you are interested in,
+and all you have left is an `Error` object. This module can help:
+
+``` javascript
+var stackTrace = require('stack-trace');
+var err = new Error('something went wrong');
+var trace = stackTrace.parse(err);
+
+require('assert').strictEqual(trace[0].getFileName(), __filename);
+```
+
+Please note that parsing the `Error#stack` property is not perfect, only
+certain properties can be retrieved with it as noted in the API docs below.
+
+## Long stack traces
+
+stack-trace works great with [long-stack-traces][], when parsing an `err.stack`
+that has crossed the event loop boundary, a `CallSite` object returning
+`'----------------------------------------'` for `getFileName()` is created.
+All other methods of the event loop boundary call site return `null`.
+
+[long-stack-traces]: https://github.com/tlrobinson/long-stack-traces
+
+## API
+
+### stackTrace.get([belowFn])
+
+Returns an array of `CallSite` objects, where element `0` is the current call
+site.
+
+When passing a function on the current stack as the `belowFn` parameter, the
+returned array will only include `CallSite` objects below this function.
+
+### stackTrace.parse(err)
+
+Parses the `err.stack` property of an `Error` object into an array compatible
+with those returned by `stackTrace.get()`. However, only the following methods
+are implemented on the returned `CallSite` objects.
+
+* getTypeName
+* getFunctionName
+* getMethodName
+* getFileName
+* getLineNumber
+* getColumnNumber
+* isNative
+
+Note: Except `getFunctionName()`, all of the above methods return exactly the
+same values as you would get from `stackTrace.get()`. `getFunctionName()`
+is sometimes a little different, but still useful.
+
+### CallSite
+
+The official v8 CallSite object API can be found [here][v8stackapi]. A quick
+excerpt:
+
+> 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?
+
+[v8stackapi]: http://code.google.com/p/v8/wiki/JavaScriptStackTraceApi
+
+## License
+
+stack-trace is licensed under the MIT license.