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By mswatcher
Submitted: May 08 2013 / 08:33

A while back, I blogged about how AngularJS uses an expando property, $$hashKey, in order to associate a $scope-based object with a current node in the Document Object Model (DOM). The existence of this expando property is critical because it prevents AngularJS from accidentally and needlessly re-creating DOM elements (and re-linking Directives) every time your objects change.
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