如何改善 eslint-plugin-angular 观看错误？

Question

$rootScope.$on('$stateChangeStart', function (event, state) {
            ...
        })

result -> es lint error The "$on" call should be assigned to a variable, in order to be destroyed during the $destroy event

but if i correct it like in the documentation

var unregister = $rootScope.$on('$stateChangeStart', function (event, state) {
            ...
        })

i get "unregister is defined but never used" error

What is the best way to correct this issue?

Answer 1

The unregister variable that is returned by $rootScope.$on is a function that needs to be called to unregister the watch. A common use case is to call it when the current scope is destroyed:

$scope.$on('$destroy', unregister);