AngularJS - What is the best way to detect undefined null or empty value at the same time? -

AngularJS - What is the best way to detect undefined null or empty value at the same time? -

sometimes need check value 3 conditions @ same time, null, undefined or "". due haven´t found method this, coded own , works.

$scope.isnulloremptyorundefined = function (value) { if (value === "" || value === null || typeof value === "undefined") { homecoming true; } }

just wanted know if there improve way accomplish same thing.

thanks much in advance,

guillermo

update

as mentioned in comments it's improve utilize return !value.

$scope.isvalid = function(value) { homecoming !value } old , incomplete answer

a proper way utilize angular.isdefined()

angularjs