Optimal method for implementing $scope.$apply(); or $scope in scenarios outside of Angular when working with Angular Components

As outlined in Kendo's best practices, there are instances where Kendo necessitates the use of $scope.$apply(); to update Angular. However, with the emergence of the new AngularJS 1.5 component, it is advised against relying on $scope.

The code for the previous Controller can be found at -

For the new 1.5 Component, refer to - http://plnkr.co/edit/tPTqlzlC9Obn5UFRUqc2?p=preview

To make the code above operational, it is necessary to assign this to a variable. For instance, using 

var self = this; ... self.firstName = item.firstName;

The Question I Have pertains to executing Angular operations correctly without resorting to using $scope.$apply(); or any mention of $scope when working with Kendo or non-Angular elements.

javascriptangularjskendo-ui

Answer №1

Absolutely, your method of creating the 'self' variable is spot on. By using 'this' in this scenario, it points to the object or context executing the change method, rather than the controller itself. For an updated version, please refer to this link.

The usage of $scope.$apply() helps initiate the Angular $digest cycle.

Usually, manually calling this function is not necessary since Angular already handles it at a different code level. A perfect example is how Angular triggers $apply within the ng-click directive's source code.

In cases like yours with Kendo UI Grid, direct invocation of $apply is needed as the gridOption.change callback is executed by Kendo UI Grid, not Angular. Hence, calling $apply signals Angular to run its $digest cycle, ensuring updates are reflected appropriately.

As for best practices, Angular introduced the controller as syntax post-1.3 to encourage the use of 'dot notation', diminishing reliance on 'scope'. Furthermore, the transition from verbose 'directive' usage to streamlined 'component' usage began in version 1.5, simplifying Angular development and segueing into Angular 2 migration steps. Explore the official guide for more insights on recommended transitioning strategies.

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