AngularJS Developer Question: Download Questions PDF
Explain me how do you reset a “$timeout”, and disable a “$watch()”?
Answer:
The key to both is assigning the result of the function to a variable.
To cleanup the timeout, just “.cancel()” it:
var customTimeout = $timeout(function () {
// arbitrary code
}, 55);
$timeout.cancel(customTimeout);
The same applies to “$interval()”.
To disable a watch, just call it.
// .$watch() returns a deregistration function that we store to a variable
var deregisterWatchFn = $rootScope.$watch(‘someGloballyAvailableProperty’, function (newVal) {
if (newVal) {
// we invoke that deregistration function, to disable the watch
deregisterWatchFn();
...
}
});
To cleanup the timeout, just “.cancel()” it:
var customTimeout = $timeout(function () {
// arbitrary code
}, 55);
$timeout.cancel(customTimeout);
The same applies to “$interval()”.
To disable a watch, just call it.
// .$watch() returns a deregistration function that we store to a variable
var deregisterWatchFn = $rootScope.$watch(‘someGloballyAvailableProperty’, function (newVal) {
if (newVal) {
// we invoke that deregistration function, to disable the watch
deregisterWatchFn();
...
}
});
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