I have an html form that looks like this :
<div class="row col-lg-offset-3">
<div class="form-group col-lg-6" ng-class="{ 'has-error': userForm.Age.$invalid && userForm.Age.$dirty}" show-errors >
<label class="control-label">Age</label>
<input type="text" class="form-control" name="Age" ng-model="user.Age" ng-required='!user.phonenumber' placeholder="Age"/>
</div>
</div>
Directive:
(function(){
angular.module('myApp', [])
.controller('studentDataController', function($scope) {})
.directive('showErrors', function() {
return {
restrict: 'A',
require: '^form',
link: function (scope, el, attrs, formCtrl) {
var inputEl = el[0].querySelector("[Age]");
var inputNgEl = angular.element(inputEl);
var inputValue = inputNgEl.attr('Age');
var isValid = (inputValue >= 3 && inputValue < 100);
inputNgEl.bind('blur', function() {
el.toggleClass('has-error', isValid);
})
}
}
});
})();
I am trying to validate input for Age field when it blurs out.Age value should be between 3 to 99.i.i.e check if the value is valid or invalid when user is done typing and leaves the text field.Then if the value is invalid, apply the has- class
The directive though is not working. Did I miss anything ?
If really have to do that via custom directive please see below:
var app = angular.module('app', []);
app.controller('MainCtrl', function($scope) {
$scope.name = 'World';
});
app
.directive('ngAge', NgLength);
function NgLength() {
return {
restrict: 'A',
require: 'ngModel',
link: function($scope, $element, $attrs, ngModel) {
$scope.$watch($attrs.ngModel, function(value) {
var isValid = (value > 3 && value < 100);
ngModel.$setValidity($attrs.ngModel, isValid);
});
}
}
}
/* Put your css in here */
.has-error {
background-color: red;
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<body ng-app="app">
<form name="userForm" ng-class="{ 'has-error': userForm.Age.$invalid && userForm.Age.$dirty}">
<label class="control-label">Age</label>
<input type="text" class="form-control" name="Age" ng-model="user.Age" ng-age placeholder="Age" />
</form>
</body>
AngularJS 1.3.x introduces $validators pipeline - it is much simpler to write custom validation rules with them.
A collection of validators that are applied whenever the model value changes. The key value within the object refers to the name of the validator while the function refers to the validation operation. The validation operation is provided with the model value as an argument and must return a true or false value depending on the response of that validation.
var app = angular.module('app', []);
app
.controller('MainCtrl', function($scope) {
$scope.name = 'World';
}).directive('ngAge', function NgLength() {
return {
restrict: 'A',
require: 'ngModel',
link: function($scope, $element, $attrs, ngModel) {
ngModel.$validators.validAge = function(modelValue, viewValue) {
var age = modelValue || viewValue;
return age > 3 && age < 100
};
}
}
});
.has-error {
background-color: red;
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.0/angular.min.js"></script>
<body ng-app="app">
<form name="userForm" ng-class="{ 'has-error': userForm.Age.$invalid && userForm.Age.$dirty}">
<label class="control-label">Age</label>
<input type="text" class="form-control" name="Age" ng-model="user.Age" ng-age placeholder="Age" />
</form>
</body>
You can use max, min directive. Please sample below
var app = angular.module('plunker', []);
.has-error {
background-color:red;
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<link data-require="bootstrap-css#*" data-semver="3.3.1" rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css" />
<html ng-app="plunker">
<body>
<div class="row col-lg-offset-3">
<form name="userForm" class="form-group col-lg-6" ng-class="{ 'has-error': userForm.Age.$invalid && userForm.Age.$dirty}" show-errors>
<label class="control-label">Age</label>
<input type="number" class="form-control" name="Age" ng-model="user.Age" ng-required='!user.phonenumber' placeholder="Age" max="100" min="3" />
</form>
</div>
Related
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Example - example-input-directive-production</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.6.0/angular.min.js"></script>
</head>
<body ng-app="inputExample">
<div ng-controller="ExampleController">
<form name="myForm">
<label>
Is Bulk:
<input type="checkbox" ng-model="isBulk" ng-change="onChange()"/>
</label
<label>
Quantity:
<input input-type="isBulk ? 'text' : 'number'" name="lastName"
ng-model="quantity"
ng-minlength="3" ng-maxlength="10"
ng-disabled="isBulk"
>
</label>
</form>
<hr/>
<div>isBulk:{{isBulk}}</div>
<div>quantity: {{quantity}}</div>
</div>
</body>
</html>
angular.module('inputExample', [])
.controller('ExampleController', ['$scope', function($scope) {
$scope.quantity = 0;
$scope.isBulk = false;
$scope.onChange = function(){
if($scope.isBulk){
$scope.quantity = "NOT APPLICABLE";
}else{
$scope.quantity = 0;
}
}
}])
.directive('inputType', function() {
return {
restrict: "A",
scope: {
quantity: "="
},
link: function(scope, element, attr) {
var inputType = scope.$eval(attr.inputType);
console.log("inputType", inputType);
element.attr("type", inputType);
}
};
});
How do I dynamically change input type based on a value.
Here is the plunker link
https://next.plnkr.co/edit/kmkNKPWcM5jq159k
Use a different template with ng-if
<input ng-if="isBulk" input-type="text" name="lastName" ng-model="quantity"
ng-minlength="3" ng-maxlength="10">
<input ng-if="!isBulk" input-type="number" name="lastName" ng-model="quantity"
ng-minlength="3" ng-maxlength="10">
Update
You could add a watcher in your directive:
scope.$watch("inputType", function (newValue, oldValue, scope) {
if (newValue && newValue !== oldValue) {
element.attr("type", newValue);
}
});
Plunker : https://next.plnkr.co/edit/EsTwRTChBHjDqD2e
Change the directive to watch the attribute expression:
app.directive('inputType', function() {
return {
restrict: "A",
link: function(scope, elem, attrs) {
̶s̶c̶o̶p̶e̶:̶ ̶{̶
̶i̶n̶p̶u̶t̶T̶y̶p̶e̶:̶ ̶=̶
̶}̶,̶
link: function(scope, elem, attrs) {
̶v̶a̶r̶ ̶i̶n̶p̶u̶t̶T̶y̶p̶e̶ ̶=̶ ̶s̶c̶o̶p̶e̶.̶$̶e̶v̶a̶l̶(̶a̶t̶t̶r̶.̶i̶n̶p̶u̶t̶T̶y̶p̶e̶)̶;̶
scope.$watch(attrs.inputType, function(newValue) {
var inputType = newValue;
console.log("inputType", inputType);
elem.attr("type", inputType);
});
}
};
});
The directive will then update whenever the value of the expression changes.
Note: By having the watcher evaluate the attribute directly, the directive avoids using an isolate scope to evaluate the attribute.
I'm trying to validate two password input fields. Simply confirm that they are equal. (Suggest another approach if mine is way wrong)
I have implemented a directive with a simple validation that checks if the "confirm" password is the same as the original. But the directive also checks for other things, so I need to have both input fields to have it.
The problem is that when I have my directive on both input fields, I cannot read their model values through the attribute (to check if they match).
Here is a working demo without the directive on the first password:
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
});
app.directive('myDir', function() {
return {
require: 'ngModel',
link: function(scope, elem, attrs, ctrl) {
ctrl.$validators.mismatch = function(modelValue, viewValue) {
// MAIN CODE:
return viewValue === scope.$eval(attrs.confirm);
};
ctrl.$validators.short = function(modelValue, viewValue) {
if (ctrl.$isEmpty(modelValue)) {
return true;
}
if (modelValue.length >= 3) {
return true;
}
return false;
}
}
};
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.7/angular.min.js"></script>
<div ng-app="myApp" ng-controller="myCtrl">
<form name="form1">
<input type="password" name="password1" ng-model="pass1"><br>
<input type="password" my-dir confirm="pass1" name="password2" ng-model="pass2"><br>
<pre>{{form1.password2.$error | json}}</pre>
<p ng-show="form1.password2.$error.mismatch" style="color:red">Passwords are different</p>
</form>
</div>
If I change the first filed to:
<input type="password" my-dir confirm="pass2" name="password1" ng-model="pass1">
to validate in both directions, then scope.$eval(attrs.confirm) becomes undefined for both fields.
Here is a demo of my issue:
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
});
app.directive('myDir', function() {
return {
require: 'ngModel',
link: function(scope, elem, attrs, ctrl) {
ctrl.$validators.mismatch = function(modelValue, viewValue) {
// `scope.$eval(attrs.confirm)` always undefined
return viewValue === scope.$eval(attrs.confirm);
};
ctrl.$validators.short = function(modelValue, viewValue) {
if (ctrl.$isEmpty(modelValue)) {
return true;
}
if (modelValue.length >= 3) {
return true;
}
return false;
}
}
};
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.7/angular.min.js"></script>
<div ng-app="myApp" ng-controller="myCtrl">
<form name="form1">
<input type="password" my-dir confirm="pass2" name="password1" ng-model="pass1"><br>
<input type="password" my-dir confirm="pass1" name="password2" ng-model="pass2"><br>
<pre>{{form1.password2.$error | json}}</pre>
<p ng-show="form1.password2.$error.mismatch || form1.password.$error.mismatch" style="color:red">
Passwords are different
</p>
</form>
</div>
You need to do 2 things:
1. Add ng-model-options="{allowInvalid: true}" so invalid value will still update scope value.
2. Now you have problem that e.g. changing 2nd input wont trigger 1st re-validation. This is done using observe:
<body ng-controller="MainCtrl" ng-init="x = 0; y = 0">
<form name="form1">
<input type="password" my-dir="{{y}}" confirm="pass2" name="password1" ng-model="pass1" ng-model-options="{allowInvalid: true}"
ng-change="x = x + 1"><br>
<input type="password" my-dir="{{x}}" confirm="pass1" name="password2" ng-model="pass2" ng-model-options="{allowInvalid: true}"
ng-change="y = y + 1"><br>
and
attrs.$observe('myDir', function() {
ctrl.$validate();
});
http://plnkr.co/edit/ws4tVWGXfFNR2yqLRJN7?p=preview
P.S. for usual fields I would write my-dir="{{pass1}}" and then no need in $eval and ng-change, but for passwords... not sure
I have an input to confirm the email twice,
However, When I used the check-email directive and the required validation is not working any more.
Any suggestion? I don't want user keeps this field blank
html
<input type="text"
id="confirm_email_booking"
name="confirm_email_booking"
class="form-control"
check-email
ng-model="payment_contact.confirm_email_booking"
/>
JS
app.directive('checkEmail', function() {
return {
require: 'ngModel',
link: function(scope, elm, attrs, ctrl) {
ctrl.$parsers.unshift(function(viewValue, $scope) {
var notMatch = (viewValue != scope.form.email_booking.$viewValue)
ctrl.$setValidity('notMatch', !notMatch)
return notMatch;
})
}
}
})
You can just check if the value is present in your directive, as below:
var notMatch = viewValue && viewValue != scope.form.email_booking.$viewValue;
Then you could have something like this:
(function() {
"use strict";
angular
.module('app', [])
.controller('MainCtrl', MainCtrl)
.directive('checkEmail', checkEmail);
MainCtrl.$inject = ['$scope'];
function MainCtrl($scope) {
}
function checkEmail() {
return {
require: 'ngModel',
link: function(scope, elm, attrs, ctrl) {
ctrl.$parsers.unshift(function(viewValue, $scope) {
var notMatch = viewValue && viewValue != scope.form.email_booking.$viewValue;
ctrl.$setValidity('notMatch', !notMatch);
return notMatch;
})
}
}
}
})();
<!DOCTYPE html>
<html ng-app="app">
<head>
<script src="http://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.8/angular.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.6/css/bootstrap.min.css">
</head>
<body ng-controller="MainCtrl">
<div class="col-md-12">
<form name="form">
<input type="text" id="email_booking" name="email_booking" class="form-control" ng-model="payment_contact.email_booking" />
<hr>
<input type="text" id="confirm_email_booking" name="confirm_email_booking" class="form-control" check-email ng-model="payment_contact.confirm_email_booking" required />
<span class="text-danger" ng-if="form.confirm_email_booking.$error.required">
Required!
</span>
<span class="text-danger" ng-if="form.confirm_email_booking.$error.notMatch">
NotMatch!
</span>
<pre ng-bind="form.confirm_email_booking | json"></pre>
</form>
</div>
</body>
</html>
This plunk has a form with a field that only allows to enter aaa. Note that the error message is set in the controller, not in the html. When the user clicks on Submit they should see the message, but the message is not shown. What's wrong with this code?
HTML
<body ng-app="ngMessagesExample" ng-controller="ctl">
<form name="myForm" novalidate ng-submit="submitForm()">
<label>
This field is only valid when 'aaa' is
<input type="field1"
ng-model="data.field1"
name="field1"
required />
</label>
<div ng-messages="myForm.field1.$error" style="color:red">
<div ng-message-exp="required">{{errorMsg}}</div>
</div>
<br/><br/>
<button style="float:left" type="submit">Submit</button>
</form>
</body>
Javascript
var app = angular.module('ngMessagesExample', ['ngMessages']);
app.controller('ctl', function ($scope) {
$scope.submitForm = function() {
if ($scope.field1 != 'aaa')
$errorMsg = "This field should be 'aaa'";
else
$errorMsg = "";
};
});
Forget my previous answer.
Easiest and most robust is actually to make a new directive.
var app = angular.module('ngMessagesExample', ['ngMessages']);
app.directive("aaa", function() {
return {
restrict: "A",
require: "ngModel",
link: function(scope, element, attributes, ngModel) {
ngModel.$validators.aaa = function(modelValue) {
return modelValue === 'aaa';
}
}
};
});
And your controller:
app.controller('ctl', function ($scope) {
$scope.data = {
field1: ""
}
$scope.submitForm = function(){
//extra whatever code
}
});
Your HTML should be this:
<body ng-app="ngMessagesExample" ng-controller="ctl">
<form name="myForm" novalidate ng-submit="submitForm(myForm)">
<label>This field is only valid when 'aaa' is</label>
<input type="field1"
ng-model="data.field1"
name="field1"
required aaa/>
<div ng-messages="myForm.field1.$error" style="color:red">
<div ng-message="required">FIELD IS REQUIRED!!</div>
<div ng-message="aaa">FIELD MUST BE 'aaa'</div>
</div>
<button style="float:left" type="submit">Submit</button>
</form>
</body>
I first using setValidity to make a directive in Angular.but not as my expected,here is my code:
angular.module('myApp', [])
.controller('ctrl',function($scope){
$scope.pw='';
})
.directive('pwCheck', function(){
return {
require: 'ngModel',
link: function (scope, elem, attrs, ctrl) {
elem.on('keyup', function () {
scope.$apply(function () {
var len = elem.val().length;
if(len===0){
ctrl.$setValidity('zero',true);
} else if(len>1 && len<6){
ctrl.$setValidity('one',true);
} else {
ctrl.$setValidity('two',true);
}
});
});
}
};
});
HTML:
<body ng-controller="ctrl">
<form id="myForm" name="myForm">
<input type="text" ng-model="pw" pw-check />
{{myForm.$error}}
<div class="msg-block" ng-show="myForm.$error">
<span class="msg-error" ng-show="myForm.pw.$error.zero">
Input a password.
</span>
<span class="msg-error" ng-show="myForm.pw.$error.one">
Passwords too short.
</span>
<span class="msg-error" ng-show="myForm.pw.$error.two">
Great.
</span>
</div>
</form>
</body>
Online Demo:
http://jsbin.com/cefecicu/1/edit
I think you need:
//Reset your validity
ctrl.$setValidity('zero',true);
ctrl.$setValidity('one',true);
ctrl.$setValidity('two',true);
if(len===0){
ctrl.$setValidity('zero',false);
} else if(len>=1 && len<6){ //use len>=1 instead
ctrl.$setValidity('one',false);
} else {
ctrl.$setValidity('two',false);
}
Using false to indicate errors (not valid):
And give a name to your input:
<input type="text" ng-model="pw" name="pw" pw-check />
http://jsbin.com/cefecicu/11/edit