caller-dir   

$3

~~~bash
npm install caller-dir
~~~

Usually, if you want to get the current path, you can use __dirname in Nodejs, if you want to get the caller's dirpath, you can call the function with a parameter which is __dirname, but is not graceful.

Now you can use this little tool caller-dir to get the caller's dirpath gracefully.

eg.
file A /src/module/a.js
~~~javascript
const getCallerDir = require('caller-dir');

function A() {
console.log(getCallerDir());
}
module.exports = A;
~~~

file B /src/b.js
~~~javascript
var A = require('./module/a');
A();
~~~

output: /src