Detailed explanation of AngularJs equal comparison object instance

Usage

1 Firstly, all that satisfy a === 3 Such objects will all return true in angular.equals(a,b)
2 All objects with the same type, as well as properties and values, will return true
3 NaN and NaN will also return true (in JavaScript, it returns false)
4 Regular expressions will also return true (in javascirpt,/abc/ /abc/is considered not equal)

Example

<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <script src="http://apps.bdimg.com/libs/angular.js/1.2.16/angular.min.js"></script>
</head>
<body ng-app="myApp">
  <div ng-controller="myCtrl">
    {{ a_equals }}
    {{ user_equals }}
    {{ nan_equals }}
    {{ reg_equals }}
  </div>
  <script type="text/javascript">
  angular.module("myApp",[])
  .controller("myCtrl",function($scope){
    var a = 3;
    $scope.a_equals = angular.equals(a,3);//a === 3
    var user1 = {"name":"xing","age":30};
    var user2 = {"name":"xing","age":30};
    $scope.user_equals = angular.equals(user1,user2);
    $scope.nan_equals = angular.equals(NaN,NaN);//in javascirpt is false
    $scope.reg_equals = angular.equals(/abc/,/abc/);// in javascript is false
  });
  </script>
</body>
</html>

Running will get four true

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Basic Tutorial