Javascript - How to clone an object?

Question

I am confused. I create a copy from myObjOne, than i delete an entry from myObjOne and JS delete the entry in my copy(myObjTwo) too? But w

Answer 1

Lots of advice on how to make a copy not only of the object and it's properties, but of all the objects referenced by its properties. Here's a version that clones the object without copying it and so that the clone inherits all properties added later except for those shadowed by own properties of the clone:

var cloneOf = (function() {
  function F(){}
  return function(o) {
    F.prototype = o;
    return new F();
  }
}());

Some may recognise the pattern. An example:

var base = {foo:'foo', bar:'bar'};
var baseClone = cloneOf(base);
alert(baseClone.foo);  // foo