angular directive ignore non-numeric input

Question

I have to write some code for IE8. I have an ng-repeat creating a table filled with:

Answer 1

First include this code in js file numericInput.js

Directive : -

.directive('numeric', function() {
    return function(scope, element, attrs) {

        $(element[0]).numericInput({ allowFloat: true });

    };
})

HTML : -

 <input type="text" numeric />

DEMO Numeric Demo

Answer 2

HTML:

<input production-qty type="text" maxlength="3" ng-model="qty1">

Directive:

app.directive('productionQty', function() {
  return {
    require: 'ngModel',
    link: function (scope, element, attr, ngModelCtrl) {
      function fromUser(text) {
        var transformedInput = text.replace(/[^0-9]/g, '');
        console.log(transformedInput);
        if(transformedInput !== text) {
            ngModelCtrl.$setViewValue(transformedInput);
            ngModelCtrl.$render();
        }
        return transformedInput;  // or return Number(transformedInput)
      }
      ngModelCtrl.$parsers.push(fromUser);
    }
  }; 
});

Plunker

See also filters on ng-model in an input. My answer above is modeled off pkozlowski.opensource's answer.

I looked at ng-pattern, but it does not filter what is shown in the textbox. It sets $scope.qty1 to undefined, but the undesired characters are visible in the textbox.

Answer 3

not directive but I use just:

controller:

    $scope.blockNonNumber = function (val, field){

       $scope[field] = val.toString().replace(/[^0-9]/g, '');

    }

html:

<input type="text" ng-model="price" ng-change="blockNonNumber(price, 'price')" pattern="[0-99]">

it's not directive but can be used in directive as wellside

Answer 4

HTML:

<input type="number" name="graduationYear" ng-model="gradYear" only-num>

Directive:

directive('onlyNum', function() {
    return function(scope, element, attrs) {

        var keyCode = [8, 9, 37, 39, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 110];
        element.bind("keydown", function(event) {
            //console.log($.inArray(event.which,keyCode));
            if ($.inArray(event.which, keyCode) === -1) {
                scope.$apply(function() {
                    scope.$eval(attrs.onlyNum);
                    event.preventDefault();
                });
                event.preventDefault();
            }

        });
    };
});