Get name and line of calling function in node.js

Question

How can one get the name and line of a function that called the current one? I would like to have a rudimentary debugging function like this (with npmlog defining log.

Answer 1

Here is a one liner for quick debugging purposes:

console.log("DEBUG", (new Error().stack.split("at ")[1]).trim());

This will log something like this with Node.js:

DEBUG SomeObject.function (/path/to/the/code.js:152:37) 

--

You can also add custom args at the end, e.g.

console.log("DEBUG", (new Error().stack.split("at ")[1]).trim(), ">>>", myVar);

Note that if you put this into a helper function, adjust the stack index from e.g. [1] to [2].