JSFiddle - React, Tailwind, and code Playground

JavaScript

// This is your Editor pane. Write your JavaScript here and 
// use the command line to execute commands

function thisLine() {
  try {
    throw new Error();
  } catch (e) {
    const regex = /\d+:\d+/i;
    const match = regex.exec(e.stack.split("\n")[2]);
    return match[0];
  }
}

console.log(thisLine());