fun call-stack experiment

test.js

function foo() {
	baz();
}

function bar() {
	baz();
}

function baz() {
	console.log(`baz() was called from: ${whereWasICalledFrom()}`);
}

function whereWasICalledFrom() {
	try {
		throw new Error("");
	}
	catch (err) {
		let stack = err.stack.toString();
		let lines = stack.match(/^(.+)$/gm);
		let callStackIdx = 0;
		for (let line of lines) {
			if (/^\s*at /.test(line)) {
				if (callStackIdx < 2) {
					callStackIdx++;
				}
				else {
					let [,functionName] = line.match(/^\s*at ([^\s]+)/);
					return functionName;
				}
			}
		}
	}
	return "(unknown)";
}

baz();
// baz() was called from: test.js:36:1

foo();
// baz() was called from: foo

bar();
// baz() was called from: bar