JavaScript Function Invocation - Constructor

javascript-func-invoke-constructor.js

// this refers to the newly created object returned by new
var Counter = function (init) {
  this.value = init || 0;
}
Counter.prototype.increment = function (inc) {
  inc = inc || 1;
  this.value += inc;
}
var anotherObj = new Counter();
var bad = Counter();  // Don't do this, value gets attached to the global object