Currently working with Angular where I have an input field only for numbers,
I am looking to limit the input so that it does not accept the number 0. Any advice on how to achieve this would be greatly appreciated.
Currently working with Angular where I have an input field only for numbers,
I am looking to limit the input so that it does not accept the number 0. Any advice on how to achieve this would be greatly appreciated.
Utilizing the $parsers feature offered by NgModelController, we are able to scan and eliminate any occurrences of zero from a number field.
I have crafted a directive that will specifically prevent zeros from being entered into a numerical input field. You can easily incorporate this directive into your application.
Once implemented, you can apply it to a numeric input element to ensure that zeros are not accepted, while still allowing for negative numbers.
Remember: This directive should be used as an attribute on the input field, like so: restrict-zero
For example:
<input type="number" restrict-zero ng-model="number">angular.module('app', [])
.controller('myCtrl', function($scope) {
$scope.number = '';
})
.directive('restrictZero', function() {
return {
require: 'ngModel',
restrict: 'A',
link: function(scope, element, attrs, modelCtrl) {
modelCtrl.$parsers.push(function(inputValue) {
if (inputValue == null)
return ''
cleanInputValue = inputValue.replace(/^0/g, '');
if (cleanInputValue != inputValue) {
modelCtrl.$setViewValue(cleanInputValue);
modelCtrl.$render();
}
return cleanInputValue;
});
}
}
});<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
</head>
<body ng-app="app" ng-controller="myCtrl">
Number : <input type="number" restrict-zero ng-model="number" name="number">
</body>
</html>Include a min='1' attribute:
<input type='number' min='1'>
If you only want to restrict the input of '0', allowing all other positive and negative numbers, you can create a function using Angular's $event to capture the key pressed and restrict the input like this:
var app = angular.module('testapp', []);
app.controller('appCtrl', ['$scope', function($scope) {
$scope.noZero = function(e) {
var kc = e.keyCode || e.which;
if (String.fromCharCode(e.which) == '0' && e.target.value.indexOf('0') == 0) {
return e.target.value = e.target.value.slice(0, -1);
}
};
}
]);<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.4/angular.min.js"></script>
<div ng-app='testapp' ng-controller='appCtrl'>
<input type='number' ng-keyup='noZero($event)'>
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