July 2017
Intermediate to advanced
454 pages
10h 1m
English
Content preview from Expert Angular
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Change detection - Angular and ZoneJS
The official site of ZoneJS describes the library as follows:
A Zone is an execution context that persists across async tasks.
Angular uses ZoneJS for detecting changes and then calls the listener methods of those events.
Angular takes advantage of zones to handle all the internal state changes and change detection. Zones understand the context of the asynchronous actions and state changes.
Angular has a built-in ngZone, which tracks all the completed asynchronous actions and notifies them with a onTurnDone event. Every component gets a change detector, which keeps track of all the bindings attached to the component in a tree structure.
We don't have $scope.apply or $digest like in the previous version ...
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