[JS] Memory leak (https://auth0.com/blog/four-types-of-leaks-in-your-javascript-code-and-how-to-get-rid-of-them/)

MemoryLeak.js

var theThing = null;
var replaceThing = function () {
  var originalThing = theThing;
  var unused = function () {
    if (originalThing)
      console.log("hi");
  };
  theThing = {
    longStr: new Array(1000000).join('*'),
    someMethod: function () {
      console.log(someMessage);
    }
  };
};
setInterval(replaceThing, 1000);