如何使用ng-if显示和隐藏布尔值

Question

Struggling to find out what to put in the last span element where it says "I_DO_NOT_KNOW", this is my markup:

<div class="row">
  <div class="key" translate>Label</div>
  <div class="value form-group">
    <input id="myId"
            class="form-control"
            type="text"
            name="nameAttrFoo"
            ng-model="vm.myModelValue"
            ng-blur="sanitizeInput(vm.myModelValue)"
            required 
    />
    </div>
<div class="value form-group pull-right" ng-hide="formName.nameAttrFoo.$untouched">
    <span class="note note-error"
            ng-show="formName.nameAttrFoo.$error.required"
            ng-hide="formName.nameAttrFoo.$dirty">
        Required field!
    </span>
    <span class="note note-error" ng-if="I_DO_NOT_KNOW">
        Number is bigger than this big prime!                
    </span>
</div>

and this is the function where I do a comparison, returning either true or false:

var boolie = false;
$scope.sanitizeInput = function(myModelValue) {
    var toInt = parseInt(myModelValue);
    var primeNr = 2147483647;

    if (toInt > primeNr) {
        boolie = true;
    } else {
        boolie = false;
    }
}

feeling like a complete imbecile here as I cannot for the life of me get my user-feedback line "Number is bigger than this big prime!" to display. I have tried a lot of things in the ng-if="I_DO_NOT_KNOW", please send help.

Answer 1

Just put boolie in the scope for example:

$scope.boolie = false;
$scope.sanitizeInput = function(myModelValue) {
    var toInt = parseInt(myModelValue);
    var primeNr = 2147483647;

    if (toInt > primeNr) {
        $scope.boolie = true;
    } else {
        $scope.boolie = false;
    }
}

and then:

<span class="note note-error" ng-if="boolie">

If you don't want to set boolie in the scope, you can call directly your function, but since it is already called on the blur event, I think that's not what you want (it must work though):

<span class="note note-error" ng-if="sanitizeInput(vm.myModelValue)">

Hoping this helps ;)