javascript - Comment fonctionne la liaison de données dans AngularJS

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  $scope.$watch('person.username', validateUnique); 

  <p>username: {{person.username}}</p> 

  <input ng-model="person.username" /> 

10 $digest() iterations reached. Aborting! 

<p>{{::person.username}}</p> 

<p ng-bind="::person.username"></p> 

<div ng-repeat="person in people track by username">   {{::person.username}} </div>