I have written on directive I just want all the ng-model elements inside the element where the directive is placed
This is my html element with loggerhelp directive
<input type="text" loggerhelp />
This is my directive
angular
.module('app').directive('loggerhelp', loggerhelp);
loggerhelp($mdDialog) {
var Popupdirective = {
restrict: 'A',
scope: false,
link: popupController
}
return Popupdirective
function popupController(scope, element, attr) {
// Here i want all the child ng-model elements.
console.log(element)
alert();
}
}
Have you tried searching by attribute like element.find("[ng-model]")? element is the jqLite-wrapped element that this directive matches so find and the selectors should work for you.
angular.module('myApp', [])
.controller('MyCtrl', ['$scope', function MyCtrl($scope) {
}])
.directive('loggerhelp', function loggerhelp() {
var loggerhelpDirective = {
restrict: 'A',
scope: false,
link: loggerhelpController
}
return loggerhelpDirective
function loggerhelpController(scope, element, attr) {
var innerElementsWithNgModel = element.find("[ng-model]");
console.log(innerElementsWithNgModel.length);
console.log(angular.element(innerElementsWithNgModel[2]).attr('ng-model'));
//so now you have an array with all the elements that have ng-model attr
//you can attach event handler function for blur
innerElementsWithNgModel.on('blur', function(){
var ngModelAttr = angular.element(this).attr('ng-model');
//we can evaluate this now using $eval
if (ngModelAttr){
console.log(scope.$eval(ngModelAttr));
}
});
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="//code.angularjs.org/1.6.2/angular.js"></script>
<div ng-app="myApp">
<div ng-controller="MyCtrl as $ctrl">
<div loggerhelp>
<input type="text" ng-model="$ctrl.model1" />
<input type="text" ng-model="$ctrl.model2" />
<input type="text" ng-model="$ctrl.model3" />
<input type="text" ng-model="$ctrl.model4" />
</div>
</div>
</div>
UPDATE 1: Working snippet to illustrate how it works.
UPDATE 2: Now we can attach event handler function for blur event using .on() and evaluate the attribute using $eval().
You can achieve this by fourth parameter of directive , i.e NgModelController, Read doc.
Code should be like:
link: function(scope, element, attr, ngModel) {
$timeout(function() {
console.log(element);
console.log(ngModel.$viewValue);
}, 0)
}
See this example fiddle
Related
Is there a clean way to access the element where the ng-disabled property is attached to inside the function that is given to it?
Html element:
<input class="needsDisabling" ng-disabled="isFieldDisabled()" type="text">
isFieldDisabled function in controller:
How can I access the element where the ng-disabled prop is attached to in this function ?
$scope.isFieldDisabled = function () {
// How can I access the element where the ng-disabled prop is attached to in this function ?
// if (element has class "needsDisabling")
// return true;
}
I am looking for another way then passing the element as a parameter
in the function.
JSFiddle
ngDisabled was designed to work with your model (#2) and does not allow to manipulate your DOM elements manually in your controllers (which is considered a bad practice in angularjs). But anyway you can still create your custom directive and manipulate disabled property manually (#1):
angular.module('myApp',[])
.directive('myDisabled', [function () {
var myDisabled = {
restrict: 'A',
scope: false,
link : function(scope, element, attrs, ngModelCtrl){
scope.$watch(function() {
return scope.$eval(attrs.myDisabled).apply(scope, element);
}, function(val) {
element.prop('disabled', val);
});
}
}
return myDisabled;
}])
.controller('MyCtrl', ['$scope', function MyCtrl($scope) {
$scope.isFieldDisabled = function (element) {
return angular.element(element).hasClass('disabled');
}
$scope.inputs = [{}, { disabled: true }, {}];
$scope.isInputDisabled = function (input){
return !!input.disabled;
};
}]);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://code.angularjs.org/1.6.4/angular.js" ></script>
<div ng-app="myApp">
<div ng-controller="MyCtrl">
<h2>#1</h2>
<input class="needsDisabling disabled" my-disabled="isFieldDisabled" type="text"/>
<input class="needsDisabling" my-disabled="isFieldDisabled" type="text"/>
<input class="needsDisabling disabled" my-disabled="isFieldDisabled" type="text"/>
<h2>#2</h2>
<div>
<input type="text" ng-repeat="input in inputs" ng-disabled="isInputDisabled(input)" ng-model="input.value"/>
</div>
</div>
</div>
You cannot pass the element to the controller's function in angularjs, but why not take advantage of the ng-class directive as your class and disabled values depend on each other?
ng-class="{needsDisabling: isDisabled}" ng-disabled="isDisabled"
I cannot think of a reason why you should not do it like this because;
If the class is not dynamic then there is no need for ng-disabled.
You could just use disabled="disabled" but I guess that is not the reason.
If the value of class IS dynamically switched outside of angular's
knowledge, then that part of the solution is problematic and should
be changed.
Another reason to deal with this issue in angularjs itself is to create your own directive as someone here pointed out.
I am dynamically adding a text field in DOM (from directive link function) & want to grab entered value and push it to controller scope object, but its always giving me undefined, below is my code:
<div class="input-group">
<span class="fieldIcon input-group-addon"><i class="fa fa-sticky-note" aria-hidden="true"></i></span>
<select name="addlist[]" multiple="multiple">
<option ng-repeat="options in optionList">{{options.label}}</option>
</select>
</div>
<script type="text/javascript">
angular.module('myapp')
.controller('AddContactController',[ '$scope', function ($scope) {
$scope.optionList = [{label: 'NewList'}];
$scope.addOption = function(optionList) {
console.log('List:', optionList); // its giving undefined
scope.optionList.push(optionList);
}
}])
.directive('optionList', ['$compile', function ($compile) {
return {
restrict: 'E',
templateUrl: '/templates/int_optionList.html',
controller: 'AddContactController',
link: function(scope, element, attrs) {
// Adding input field and on click of a button controllers addOption function should be called with the text field value
var addListField = '<input class="form-control" type="text" ng-modal="addList" name="addList" placeholder="Add new list...">'+
+'<button class="btn btn-default" type="button" ng-click="addOption()">';
addListField = $compile(addListField)(scope);
$(element).find('.multiselect-container').prepend(addListField);
}
}
}]);
</script>
Now here in addOption function I am getting optionList value as undefined.
Error is human :).
Replace ng-modal by ng-model in your directive
AngularJS expects models to be in object form, setting ng-modal="addList" to ng-modal="data.addList" might help.
I have a form label containing an input:
<label data-live-email-check="http://www.example-service-uri.com/">
<span class="embedded-label">Email</span>
<input ng-model="formData.email"
type="email"
name="email"
placeholder="Email"
required/>
<span class="message" ng-show="emailValidationMessage">{{emailValidationMessage}}</span>
</label>
I want to create a directive that takes the URL provided by the data-live-email-check attribute and sends the email to that URL, validating whether or not it already exists.
angular.module("App").directive("liveEmailCheck", [function () {
return {
restrict: "A",
scope: {
ngModel: "="
},
link: function (scope, element, attrs) {
scope.$watch(
function(){
return scope.ngModel
},
function(newVal){
console.log(newVal);
}
);
}
}
}]);
I just want to watch the model on the input, and fire a request when it updates.
Since the directive is defined on the label element ngModel is not properly bound. What am I doing wrong? My watch expression is not logging anything because it never fires.
I know I could manually grab the input, but that just seems like I'd be breaking the "angular pattern" that I feel so "bound" by. The frustrating thing is that there seems to be so many ways to do everything in Angular that I can never tell if I'm approaching a problem correctly or not.
--Edit--
To provide the solution that I personally would take (out of ignorance of a "better" way), would be the following:
angular.module("App").directive("liveEmailCheck", [function () {
return {
restrict: "A",
require: ["^form"],
link: function (scope, element, attrs, ctrl) {
var formCtrl = ctrl[0];
scope.formEl = formCtrl[element.find("input").attr("name")];
scope.$watch(function(){return scope.formEl.$valid},
function(newVal){
console.log(newVal);
});
}
}
}]);
This WORKS, but I feel like it "breaks the angular rules".
A custom validation is written like this:
'use strict';
angular.module('App')
.directive('liveEmailCheck', function (){
return {
require: 'ngModel',
link: function (scope, elem, attr, ngModel){
ngModel.$validators.liveEmailCheck= function (value){
//Your logic here or in a factory
};
}
};
});
and then on your HTML it goes like
<input type="email" live-email-check="liveEmailCheck>
Basically you add your own validation to the set of build-in validations of angular.
What you need here is an ng-model asyncValidator. Here is a simple implementation of such a directive.
angular.module("App").directive('asyncEmailValidator', function ($http) {
return {
require: 'ngModel',
link: function (scope, element, attrs, ngModel) {
var emailValidationUrl = attrs.asyncEmailValidator;
ngModel.$asyncValidators.emailValidator = function (modelValue, viewValue) {
var value = modelValue || viewValue;
// NOTE: don't forget to correctly add the value to the url
return $http(emailValidationUrl + value).then(function (validationResponse) {
// NOTE: return rejected promise if validation failed else true
});
};
}
};
});
How you can use it in your case:
<label>
<span class="embedded-label">Email</span>
<input ng-model="formData.email"
async-email-validator="http://www.example-service-uri.com/"
type="email"
name="email"
placeholder="Email"
required/>
<span class="message" ng-show="<FormNameHere>.email.$error.emailValidator">
{{emailValidationMessage}}
</span>
</label>
This will be the right solution because it is implemented with angular ng-model validation which considers the validity of the model too.
I have a text box. I would like to call a method inside controller only when user has filled in 'n' or more number of characters in the textbox.
Can someone please give me pointers on how to approach this?
Thanks
Id recommend just using ngChange and binding to an evaluation function. Below is a sample
angular.module('inputChange', [])
.controller('TextInputController', ['$scope', function ($scope) {
var inputMin = 3;
$scope.someVal = '';
$scope.result = '';
$scope.textChanged = function() {
if ($scope.someVal.length >= inputMin) executeSomething()
else $scope.result = '';
};
function executeSomething() {
$scope.result = $scope.someVal;
};
}]);
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="inputChange" ng-controller="TextInputController">
<input type="text" ng-model="someVal" ng-change="textChanged()" ng-Trim="false" />
<br />
someVal: <span ng-bind="someVal"></span>
<br />
Result: <span ng-bind="result"></span>
<br />
someVal Length: <span ng-bind="someVal.length"></span>
<br />
Result Length: <span ng-bind="result.length"></span>
</div>
You could simply achieve this by using ng-keyup directive
ng-keyup="(1myNgModel.length >= n) && myFunction()"
Desired function will only gets called only if length of model is greater than equal to n length
Working Plunkr
Though the better version would be having ng-model-options with debounce time, so that it will reduce number of value change. After that we can easily use ng-change directive to fire function.
<input type="text" ng-model="myNgModel"
ng-change="(myNgModel.length >= 3) && myFunction()"
ng-model-options="{ debounce: 200 }" />
Updated Demo
You can add a directive to your element and $watch for model changes. Then you can fire any logic you wish when your model has changed and has a value. In this case, lets call our model expression. Here is an example for a <textarea> element. This approach can just as well be used for an <input /> element as well.
<textarea watcher ng-model="expression"></textarea>
app.directive('watcher', [function () {
return {
restrict: 'A',
link: function (scope, elem, attrs) {
scope.$watch(attrs.ngModel, function (v) {
if(v) {
// you have a value
} else {
// no value
}
});
}
}
}]);
JSFiddle Example
A good way to do this is to use a directive. Here's how it might be done:
view:
<div ng-app="foo" ng-controller="fooController">
<textarea text-length-handler="doThing()" text-length="6" ng-model="text">
</textarea>
</div>
js:
angular.module('foo', [])
.directive('textLength', function(){
return {
restrict: 'A',
require: 'ngModel',
scope: {
textLengthHandler: '&'
},
link: function ($scope, $element, $attrs, ctrl) {
var limit = parseInt($attrs.textLength);
var handler = function(){
if (ctrl.$modelValue.length >= limit) {
$scope.textLengthHandler()
}
};
$element.on('keypress', handler);
// remove the handler when the directive disappears
$scope.$on('destroy', function(){
$element.off('keypress', handler)
});
}
}
})
Fiddle here:
http://jsfiddle.net/dtq0mz8m/
If you tie the input field to a variable using ngModel, you can watch it from the controller (is not very elegant, though) using $watch or $observe whenever it changes, and check the length.
Is it possible to add the element id in Angular,
<div class="col-sm-8">
<select class="form-control input-sm"
id="ruleResetType"
name="ruleResetType"
ng-model="rule.resetType"
ng-options="data as data for data in Type"
ng-required="true"
ng-disabled="isEditable(id)">
</select>
</div>
I wonder if is it possible to add id at isEditable(id)", I mean the id shall be the element.id?
This should work, but like Greg says, you probably don't want to use the element id.
app.directive("disableIfIn", function(){
return {
restrict: 'A',
transclude: true,
scope: {
disabledElements: '#disableIfIn'
},
template: '<div ng-transclude></div>',
link: function (scope, element, attrs) {
if(scope.disabledElements.indexOf(attrs.id) === -1){
element.prop('disabled', false);
}
}
};
});
Then (assuming the existence of disabledElements on your scope and elements are disabled by default) add this attribute to your HTML elements:
disable-if-in="{{disabledElements}}"