Rate limiting in javascript, ideal for things like watch location

limit.js

var timer = false;

function doSomething(){
  if (timer == false){
		console.log("DOING SOMETHING");
		timer = true;
		console.log("Timer is set")
		setTimeout(function(){timer = false;
			console.log("Timer is clear")
								},10000);
		
	}
	else{
		console.log("Denied by LIMIT")
	}
}