Ensure execution post completion of evalAsync process

I am relatively new to working with JavaScript and Angular technology. I have encountered a situation where two separate pieces of code are running in different callbacks, triggered by third-party libraries (specifically Kendo UI library callbacks).

One function, Function A(), initiates a $scope.evalAsync operation.

Function B() relies on the data set by Function A() to carry out its tasks accordingly. However, due to being in different scopes, these two functions cannot directly interact with each other.

The execution of Function B() needs to wait for Function A() to complete before it can proceed.

Is there an elegant solution to achieve this? One possibility I am considering is adding another boolean variable to $rootScope and pausing a function until it changes from false to true.

Unfortunately, using $q promises is not an option in this case because A() and B() are both triggered by separate callbacks within the third-party library without shared scope.

javascriptangularjsrace-condition

Answer №1

To accomplish this task, one effective approach is to utilize promises. Establish a connection between the two evaluations using the $rootScope. The following steps can be taken:

  1. Initiate a promise on the rootScope at the application's initiation.
  2. Upon completion of function A(), resolve the established promise.
  3. Make sure that function B() awaits the resolution of the promise before execution.

This method assumes that both functions will only be executed once. If there is a need for them to run multiple times, a more intricate setup is required.

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