Pushing values in array in angularjs using array.push(val) creates deep copy or not?

Question

While using array.push() to add values at the end of an array in angularjs will it create a deep copy of the pushed value inside the array or not.

Answer 1

No, you will be adding a reference to the original object to the array, not the value or a copy

var obj = { key: "value" }
var arr = [];
arr.push(obj);

obj === arr[0];
// true

Answer 2

No, Deep copy can be done via angular.copy. For example.

var data = [{'name':'abc'}, {'name':'xyz'}];
var copiedOne = angular.copy(data);

Answer 3

In Javascript objects are always passed by reference unless you make a copy of it yourself.