tag function for formatting console.log(..) statements

1.js

function logger(strings,...values) {
	var str = "";
	for (let i = 0; i < strings.length; i++) {
		if (i > 0) {
			if (values[i-1] && typeof values[i-1] == "object") {
				if (values[i-1] instanceof Error) {
					if (values[i-1].stack) {
						str += values[i-1].stack;
					}
					else {
						str += values[i-1];
					}
					continue;
				}
				else {
					try {
						str += JSON.stringify(values[i-1]);
						continue;
					}
					catch (err) {}
				}
			}
			str += values[i-1];
		}
		str += strings[i];
	}
	console.log(str);
	return str;
}

2.md

var v = 42;
var o = { a: 1, b: [2,3,4] };

logger`This is my value: ${v} and another: ${o}`;
// This is my value: 42 and another: {"a":1,"b":[2,3,4]}

try {
  nothing();
}
catch (err) {
  logger`Caught: ${err}`;
}
// Caught: ReferenceError: nothing is not defined
//    at <anonymous>:2:3