detect for empty field in angularJS

Question

I'm getting json data with a bunch of spaces as strings like this:

{
  appNumber: "       "
}

but at times i get this back

{
  appNumber: "123456"
}

I want to be able to detect when it doesnt have any numerical value in it and display a dash instead

so in my controller i have:

$scope.appNumber = function() {

        var appNumber = $scope.appNumber.trim();

        if (!appNumber) {
          return "-";
        }

        return $scope.appNumber;
      };

in my HTML:

<div ng-bind="appNumber()"></div>

you are calling trim on the current scope function. change the name of your variable you want to trim — Amadou Beye
– Amadou Beye, Commented May 24, 2017 at 15:29

Amadou Beye · Accepted Answer · 2017-05-24 15:56:54Z

2

You are calling trim on the current scope function. change the name of your variable you want to trim

To return appNumber if it is a number or '-' try below

$scope.appNumber = function() {
    $scope.str = "12312";
    var x = + $scope.str;
    if (x.toString() === $scope.str) {
        return $scope.str;
    }
    return '-';
 };

Working fiddle

edited May 24, 2017 at 15:56

answered May 24, 2017 at 15:34

Amadou Beye

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