How to Get the Caller's Filename in Node.js

How to Get the Caller's Filename in Node.js There are situations — such as logging — where you want to know the name of the JavaScript file that called a function. The following code retrieves the filename of the JavaScript file that called hogehoge(): import path from 'path'; const hogehoge = () => { // Get the caller's filename const caller = path.basename(new Error().stack.split('at ')[2].trim()).split(':')[0]; // Print to stdout console.log(caller); } Explanation Here's the same code broken down step by step: import path from 'path'; // Node.js Path Module const hogehoge = () => { // Get the caller's filename const stack = new Error().stack; // (1) Get the stack trace const lines = stack.split('at '); // (2) Split by 'at' to get an array const line = lines[2]; // (3) Take the 3rd element (index 2) const trimed = line.trim(); // (4) Remove leading/trailing whitespace and newlines const basename = path.basename(trimed); // (5) Strip the directory path const splited = basename.s