What is the difference between angular.copy() and an assignment (=)?

Question

I want to assign some values when a button click event happens via event parameter:

$scope.update = function(context) {
    $scope.master = context;
};
         


        

Answer 1

In assignment we share the reference of the object. when we use angular.copy we create a new reference point with the same object details.

var user1={name:'hello'};

The object {name:'hello'} has a reference point(let's say 123, which is saved in user1; when we write

var user2=var user1; //reference point of user2 is also 123 
user2.name="world"; //we update the object in 123
console.log(user1.name); //answer is "world" because reference object is updated

In case you don't want to update user1 when you change something in user2 we have to create a copy. we can do it like

var user2=angular.copy(user1);

or

var user2=Object.assign({},user1);