I want to allow the user to enter only positive numbers in the textbox
My code is as follows:
script.js file contents:
angular.module("myfapp", []).controller("HelloController", function($scope) {
$scope.helloTo = {};
$scope.helloTo.title = "AngularJS";
});
angular.module('myApp', []).controller('MainCtrl', function($scope) {
app.directive('validNumber', function() {
return {
require: '?ngModel',
link: function(scope, element, attrs, ngModelCtrl) {
if (!ngModelCtrl) {
return;
}
ngModelCtrl.$parsers.push(function(val) {
var clean = val.replace(/[^0-9]+/g, '');
if (val !== clean) {
ngModelCtrl.$setViewValue(clean);
ngModelCtrl.$render();
}
return clean;
});
element.bind('keypress', function(event) {
if (event.keyCode === 32) {
event.preventDefault();
}
});
}
};
});
});
angular.html contents as follows:
<html>
<head>
<script src="angular.min.js"></script>
<script src="script.js"></script>
<style>
.entry {
width: 300px;
margin: 10px auto;
text-align: center;
}
</style>
</head>
<body ng-app="myfapp">
<div ng-controller="HelloController" >
<h2 class="entry">Welcome {{ helloTo.title }} to the world of Tutorialspoint!</h2>
</div>
<section ng-app="myApp" ng-controller="MainCtrl">
<h4 class="entry">AngularJS Numeric Value Widget</h4>
<div class="well entry">
<label>Employee Age
<input type="text" ng-model="employee.age" placeholder="Enter an age" valid-number/>
</label>
</div>
</section>
</body>
</html>
Why does it not work? Can anyone run it and check please!
I want to allow the user to enter only positive numbers in the textbox
My code is as follows:
script.js file contents:
angular.module("myfapp", []).controller("HelloController", function($scope) {
$scope.helloTo = {};
$scope.helloTo.title = "AngularJS";
});
angular.module('myApp', []).controller('MainCtrl', function($scope) {
app.directive('validNumber', function() {
return {
require: '?ngModel',
link: function(scope, element, attrs, ngModelCtrl) {
if (!ngModelCtrl) {
return;
}
ngModelCtrl.$parsers.push(function(val) {
var clean = val.replace(/[^0-9]+/g, '');
if (val !== clean) {
ngModelCtrl.$setViewValue(clean);
ngModelCtrl.$render();
}
return clean;
});
element.bind('keypress', function(event) {
if (event.keyCode === 32) {
event.preventDefault();
}
});
}
};
});
});
angular.html contents as follows:
<html>
<head>
<script src="angular.min.js"></script>
<script src="script.js"></script>
<style>
.entry {
width: 300px;
margin: 10px auto;
text-align: center;
}
</style>
</head>
<body ng-app="myfapp">
<div ng-controller="HelloController" >
<h2 class="entry">Welcome {{ helloTo.title }} to the world of Tutorialspoint!</h2>
</div>
<section ng-app="myApp" ng-controller="MainCtrl">
<h4 class="entry">AngularJS Numeric Value Widget</h4>
<div class="well entry">
<label>Employee Age
<input type="text" ng-model="employee.age" placeholder="Enter an age" valid-number/>
</label>
</div>
</section>
</body>
</html>
Why does it not work? Can anyone run it and check please!
Share Improve this question edited Jan 6, 2016 at 10:55 pouyan021 1891 gold badge4 silver badges20 bronze badges asked Jan 6, 2016 at 9:59 Clyde DiasClyde Dias 1951 gold badge5 silver badges18 bronze badges 2 |2 Answers
Reset to default 19Change your input type to number, then you can use min directive to specify the minimum number allowed.
<input type="number" ng-model="employee.age" placeholder="Enter an age" min="0"/>
There are a lot of problems with your code.
- you've nested
ng-appwhich is not allowed normally, use a singleng-appwith multipleng-controller. - your need to use
restrictinside yourdirectiveto restrict its usage to one or multiple types (i.e. A=Attribute,E=Element,C=Class), like in this caserestrict: "A" - When specifying a
controllerits generally a good practice to use array with the last element being thecontrollerfunctionand the first ones being all theservicesfactoriesyou are using in string format - @MajidYaghouti's suggestion is good to use
ng-changebut if you insist on using directives I have done some bit of corrections to your code. - Use some code formatting dude, and name your stuff cautiously and elegantly.
your script.js
angular.module("myfapp", []).controller("HelloController", ["$scope", function($scope) {
$scope.helloTo = {};
$scope.helloTo.title = "AngularJS";
}])
.controller('MainCtrl', ["$scope", function($scope) {
}])
.directive('validNumber', function() {
return {
restrict: "A",
require: '?ngModel',
link: function(scope, element, attrs, ngModelCtrl) {
if (!ngModelCtrl) {
return;
}
ngModelCtrl.$parsers.push(function(val) {
if (val === null)
return;
var myRegex = /\d+\.(\d{1,2})?/;
var clean = myRegex.exec(val)[0];
if (val != clean) {
ngModelCtrl.$setViewValue(clean);
ngModelCtrl.$render();
}
return clean;
});
element.bind('keypress', function(event) {
if (event.keyCode === 32) {
event.preventDefault();
}
});
}
};
});
and your index.html
<html>
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.8/angular.js"></script>
<script src="script.js"></script>
<style>
.entry {
width: 300px;
margin: 10px auto;
text-align: center;
}
</style>
</head>
<body ng-app="myfapp">
<div ng-controller="HelloController" >
<h2 class="entry">Welcome {{ helloTo.title }} to the world of Tutorialspoint!</h2>
</div>
<section ng-controller="MainCtrl">
<h4 class="entry">AngularJS Numeric Value Widget</h4>
<div class="well entry">
<label>Employee Age
<input type="text" ng-model="employee.age" placeholder="Enter an age" valid-number/>
</label>
<div>
{{ employee.age }}
</div>
</div>
</section>
</body>
</html>
updated plunkr
myfapptoMyFirstAppsounds nicer.. :P – Minato Commented Jan 6, 2016 at 10:03