callsites 
Get callsites from the V8 stack trace API
Install
$ npm install callsites
Usage
const callsites = require('callsites');
function unicorn() {
console.log(callsites()[0].getFileName());
}
unicorn();
API
Returns an array of callsite objects with 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 string representing the location where eval was called.
isToplevel: is this a top-level 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?
License
MIT © Sindre Sorhus