Seeking to create an AngularJS directive in TypeScript that wraps each $http get request with a boolean parameter "isShow" to monitor the request status and dynamically show/hide the HTML element depending on it (without utilizing $scope or $watch). Any suggestions on how to accomplish this? Thank you.
Implement the concept of the promise disposer pattern:
var spinnerSemaphore = 0;
function maintain(fn){
spinnerSemaphore++;
var result = $q.when(fn());
fn().then(function(){ spinnerSemaphore--; },
function(){ spinnerSemaphore--; });
return result;
}
This approach allows you to:
maintain(function(){
return $http.get(...);
});
maintain(function(){
return $http.get(...);
});
maintain(function(){
return $http.get(...);
});
maintain(function(){
return $timeout(...); // this applies to other promises as well
});
Connect displaying the spinner to the variable spinnerSemaphore (where a value of 0 means hiding the spinner, and any value greater than 0 means showing it).
For those in search of a solo spinner, the task can be accomplished seamlessly by linking its visibility to ng-show (or any similar function) with $http.pendingRequests.length. This approach naturally requires access to either $http within scope or $rootScope.
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