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General Tech Bugs & Fixes 2 years ago
Posted on 16 Aug 2022, this text provides information on Bugs & Fixes related to General Tech. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
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I'm finding that I need to update my page to my scope manually more and more since building an application in angular.
The only way I know of to do this is to call $apply() from the scope of my controllers and directives. The problem with this is that it keeps throwing an error to the console that reads :
$apply()
Error: $digest already in progress
Does anyone know how to avoid this error or achieve the same thing but in a different way?
You can check if a $digest is already in progress by checking $scope.$$phase.
$digest
$scope.$$phase
if(!$scope.$$phase) { //$digest or $apply }
$scope.$$phase will return "$digest" or "$apply" if a $digest or $apply is in progress. I believe the difference between these states is that $digest will process the watches of the current scope and its children, and $apply will process the watchers of all scopes.
"$digest"
"$apply"
$apply
To @dnc253's point, if you find yourself calling $digest or $apply frequently, you may be doing it wrong. I generally find I need to digest when I need to update the scope's state as a result of a DOM event firing outside the reach of Angular. For example, when a twitter bootstrap modal becomes hidden. Sometimes the DOM event fires when a $digest is in progress, sometimes not. That's why I use this check.
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