A Me() function for JavaScript and Google Apps Script

Quite a while back I wrote about a Me function for C#. I used to have an equivalent in JavaScript ES3. It used the now-deprecated arguments vector, which had to be passed in on the call:

function Me(a) { return a.callee.toString().split(" ")[1].split("(")[0].trim(); } // example usage.  function foo() { Logger.log("[%s] We are in function %s", Me(arguments), Me(arguments)); } 

I recently discovered a way that works for more recent JavaScripts including Google Apps Script. I expect it is not the most performant and should not be used in a Production environment. It's proving very helpful in Development.

The code below is TypeScript. Remove the : string and the exclamation mark after stack and you should have working JavaScript.

function Me() : string { const e = new Error(); const frame = e.stack!.split("\n")[2]; const functionName = frame.split(" ")[5]; return functionName; } 

The function can be used for logging and who knows what else:

function foo() { Logger.log("[%s] We are in function %s", Me(), Me()); }