ng-disabled with function that activates on change

I am attempting to create a submit validation button that will only enable when all fields have been entered correctly. Due to the complexity of the validation process, I am unable to rely solely on formName.$invalid and need to write a custom function for validation. I expected the shouldEnable function to be triggered with each model change, but it does not seem to work that way. Is there an alternative solution for this issue?

Initial

<button ng-disabled="formName.$invalid">Submit</button>

Expected

<button ng-disabled="shouldEnable()">Submit</button>

$scope.shouldEnable = function() {
    $scope.isEnable = true;
    angular.forEach($scope.form.input2, function(val) {
        if($scope.form.input2.inputA && $scope.form.input2.inputB) {
            isEnable = false;
        }
    })
}

Answer №1

Ensure that your function returns a boolean value:

$scope.checkIfEnabled = function() {
    var isEnabled = true;
    // perform required validations
    return isEnabled;
}

Answer №2

When working with Angular's data-binding feature, it is recommended to utilize the following code snippet:

<button ng-disabled="isDisabled">Submit</button>

// yourData represents the object mapped in the form
$scope.$watch('yourData', function(newData) {
   $scope.isDisabled = checkValidity(newData);
});

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