Develop Reference

Angular 1 - toggle radio button

I need to make a radio button toggle when user click. Is more then 2 buttons.
So, when I click one button if this is selected will no longer be. If is not must be selected.
I try this, but is not works:
app.directive('toggleRadio', function($timeout) {
return {
restict: 'A',
link: function(scope, el, attrs) {
var radioState;
el.on('click', function(){
if (radioState === this) {
this.checked = false;
radioState = null;
} else {
radioState = this;
}
scope.$apply();
});
}
}
It's not require to be a directive... Thanks.

Since it's a single radio button and as you said It's not required to be a directive, which doesn't seem to be necessary as well, then you can do something like below:
var app = angular.module('app', []);
app.controller('MainCtrl', ['$scope', function($scope) {
$scope.checked = false;
}]);
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="app">
<div ng-controller="MainCtrl">
<input type="radio" ng-model="checked"
ng-value="true" ng-click="checked=!checked" />
{{checked}}
</div>
</div>
Updated:
Ideally, you should use checkboxes for such requirement, but if it so necessary to use radio, then do it like below:
var app = angular.module('app', []);
app.controller('MainCtrl', function($scope) {
$scope.valChanged = false;
$scope.checked = "b";
$scope.toggle = function() {
if (!$scope.valChanged) {
$scope.checked = "";
}
$scope.valChanged = false;
}
});
<script src="https://code.angularjs.org/1.5.2/angular.js"></script>
<div ng-app="app">
<div ng-controller="MainCtrl">
<br>
<input type="radio" ng-model="checked" value="a"
ng-change="valChanged = true" ng-click="toggle()" />Option A
<br>
<input type="radio" ng-model="checked" value="b"
ng-change="valChanged = true" ng-click="toggle()" />Option B
<br>
<input type="radio" ng-model="checked" value="c"
ng-change="valChanged = true" ng-click="toggle()" />Option C
<hr> {{checked}}
</div>
</div>

I choose to create this directive:
myApp.directive('toggleRadio', [function(){
return {
restrict: 'A',
link: function(scope, el, attrs) {
el.on("mouseenter", function(e){
scope.radioStr = e.target.checked;
console.log('scope.radioStr hover: ', scope.radioStr);
});
el.on("click", function(e){
if(scope.radioStr) {
e.target.checked = false;
scope.radioStr = false;
}
else {
e.target.checked = true;
scope.radioStr = true;
}
});
}
}
}]);
And in HTML I have:
With this approach it will works just when user clicks on input itself, not for label. If somebody wants that, must rewrite this directive to find input status with, el.find(), el.next() etc.
Thanks everyone, all your informations help me to understand what've done!

How to bind a value from one ng-model to an other by matching a specific string

I got a requirement to bind a value to a particular model when the value in the other model contains a string starting with "https".
For example, I have two text fields both fields having different model
<input type="text" ng-model="modelText1">
<input type="text" ng-model="modelText2">
Suppose I type a value on the first text field "https", the first input model modelText1 have to bind to the second input model modelText2 and later on i have to maintain it as like two-way binding. i.e. the second field will automatically get the value dynamically when it contains "https" at starting of a string.

Try it like in this Demo fiddle.
View
<div ng-controller="MyCtrl">
<input type="text" ng-model="modelText1">
<input type="text" ng-model="modelText2">
</div>
AngularJS Application
var myApp = angular.module('myApp',[]);
myApp.controller('MyCtrl', function ($scope) {
$scope.modelText1 = '';
$scope.modelText2 = '';
var regEx = new RegExp(/^https/);
$scope.$watch('modelText1', function (newValue) {
if (newValue.toLowerCase().match(regEx)) {
$scope.modelText2 = newValue;
} else {
$scope.modelText2 = '';
}
});
});
An other approach is (that avoid using of $watch) is to use AngularJS ng-change like in this
example fiddle.
View
<div ng-controller="MyCtrl">
<input type="text" ng-model="modelText1" ng-change="change()">
<input type="text" ng-model="modelText2">
</div>
AngularJS Application
var myApp = angular.module('myApp',[]);
myApp.controller('MyCtrl', function ($scope) {
$scope.modelText1 = '';
$scope.modelText2 = '';
var regEx = new RegExp(/^https/);
$scope.change = function () {
if ($scope.modelText1.toLowerCase().match(regEx)) {
$scope.modelText2 = $scope.modelText1;
} else {
$scope.modelText2 = '';
}
};
});

You can use the ng-change directive like this:
<input type="text" ng-model="modelText1" ng-change="onChange()">
<input type="text" ng-model="modelText2">
and your controller:
$scope.onChange = function() {
if ($scope.modelText1 === 'https') {
$scope.modelText2 = $scope.modelText1;
else
$scope.modelText2 = '';
};

use ng-change to check the text is equal to 'https'
angular.module('app',[])
.controller('ctrl',function($scope){
$scope.changeItem = function(item){
$scope.modelText2 = "";
if(item.toLowerCase() === "https"){
$scope.modelText2 = item
}
}
})
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="app" ng-controller="ctrl">
<input type="text" ng-model="modelText1" ng-change="changeItem(modelText1)">
<input type="text" ng-model="modelText2">
</div>
EDiTED
to make sure it does't fail under 'HTTPS' use toLoweCase function to make all lower case

HTML :
<input type="text" ng-model="modelText1" ng-change="updateModal(modelText1)">
JS :
var modelText1 = $scope.modelText1.toLowerCase();
$scope.updateModal = function(){
$scope.modelText2 = '';
if(modelText1.indexOf('https')!=-1){
$scope.modelText2 = modelText1;
}
}

you could also possibly do this as a directive if you want to have a more reusable solution over multiple views http://jsfiddle.net/j5ga8vhk/7/
It also keeps the controller more clean, i always try to use the controller only for controlling complex business logic and business data
View
<div ng-controller="MyCtrl">
<input type="text" ng-model="modelText1" >
<input type="text" ng-model="modelText2" model-listener="modelText1" model-listener-value="https" >
</div>
Angular JS
var myApp = angular.module('myApp',[]);
myApp.controller('MyCtrl', function ($scope) {
$scope.modelText1 = '';
$scope.modelText2 = '';
});
myApp.directive('modelListener', [function() {
return {
restrict: 'A',
controller: ['$scope', function($scope) {
}],
link: function($scope, iElement, iAttrs, ctrl) {
$scope.$watch(iAttrs.modelListener, function() {
if($scope[iAttrs.modelListener] === iAttrs.modelListenerValue ) {
$scope[iAttrs.ngModel] = $scope[iAttrs.modelListener];
} else {
$scope[iAttrs.ngModel] = "";
}
}, true);
}
};
}]);

accessing attribute directive values using controller as

I know how to do it Without controller as:
html
Let's assume I have a directive named ngUpperCase(either true or false)
<div ng-controller="myControl" >
<input type="text" ng-upper-case="isGiant" >
</div>
Js
myApp.directive('ngUpperCase',function(){
return{
restrict:'A',
priority:0,
link:function($scope,element,attr){
//---to retrieve value
var val = $scope[attr.ngUpperCase];
var anotherVal = $scope.$eval(attr.ngUpperCase);
$scope.$watch(attr.ngUpperCase,function(val){
//---to watch
})
}
};
})
How to make the directive if I'm using something like this?
<div ng-controller="myControl as ctl" >
<input type="text" ng-upper-case="ctl.isGiant" >
</div>

Since it's not very clear what you want to achieve, here is an example of doing what I understand you need: changing an input value to upper or lower case depending on a variable:
function ngUpperCase() {
return{
restrict:'A',
priority:0,
link:function($scope,element,attr){
//---to retrieve value
var val = $scope[attr.ngUpperCase];
var anotherVal = $scope.$eval(attr.ngUpperCase);
$scope.$watch(attr.ngUpperCase,function(val){
if(val) {
element[0].value = element[0].value.toUpperCase();
} else {
element[0].value = element[0].value.toLowerCase();
}
})
}
}
}
function myController() {
this.isGiant = true;
}
angular.module('myApp', []);
angular
.module('myApp')
.controller('myController', myController)
.directive('ngUpperCase', ngUpperCase);
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.6/angular.min.js"></script>
<div ng-app="myApp">
<div ng-controller="myController as ctl" >
lower case<br>
upper case
<input type="text" ng-upper-case="ctl.isGiant" value="TeStiNg123" >
</div>
</div>

Concatenate (append) one input field value to another field in angular form

Trying to auto-populate first input field value into second input field value, However if the second input field as existing values then i would like to append / concatenate the first input field value to second.
logic:
if ( second ){
second = first + second;
}else{
second = first;
}
html:
<input type='text' ng-model='owner' required class="form-control">
<input type='text' ng-model='member' required class="form-control">
code:
app.controller("Controller", ['$scope', function($scope){
$scope.$watch(function () {
return $scope.owner;
},
function (newValue, oldValue) {
if ( $scope.member ){
$scope.member = $scope.owner + ',' + $scope.member;
}else{
$scope.member = newValue;
}
}, true);
}]);
plunker
Update (problem):
When i type Jake in Owner Field, it loops through the letters and print's as Jake,Jak,Ja,Jin member field. If i have pre-existing value Adam in member field, upon entering Tom in owner filed it will create Tom,To,T,Adam in member field. Please check the plunker for demo.

Mad-D consider changing your approach as it is prone to a circular dependency based on the way ng-model works.
You already have access to both values and you can display it in other ways. Plus your controller looks cleaner and acts as a true view model (vm):
Plunker
app.controller("Controller", function(){
var myCtrl = this;
myCtrl.owner = "";
myCtrl.member = "";
});

I have created a plnkr
. And also given below. Check whether it's correct one for you.
var app = angular.module('form-example1', []);
app.controller("Controller", ['$scope', function($scope){
$scope.permaMember = $scope.member?$scope.member:'';
$scope.editSecond = function(member){
$scope.permaMember = member?member:'';
}
$scope.editFirst = function(owner){
if(owner){
$scope.member = $scope.permaMember + owner
}
else{
$scope.member = $scope.permaMember
}
}
}]);
<!doctype html>
<html ng-app="form-example1">
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.0-rc.2/angular.min.js"></script>
<script type="text/javascript" src="script.js"></script>
</head>
<body>
<div ng-controller="Controller">
<form name="testform">
<div class='form-group'>
<label>Owner</label>
<input type='text' ng-model='owner' required class="form-control" ng-change="editFirst(owner)">
</div>
<div class='form-group'>
<label>Member</label>
<input type='text' ng-model='member' required class="form-control" ng-change="editSecond(member)">
</div>
<button ng-disabled="testform.$invalid" ng-click ="submit()">SAVE</button>
</form>
</div>
</body>
</html>

Why not just have a 3rd read only text box or label that displays $scope.owner, $scope.member?

Hide a Current Button on ng-click

I have a button for updating data in ng-form. This button only appear when some form input is changed. I done this with $dirty.
When the Update is clicked, I update the data. But I want to hide this button when it clicked.
I have an ng-click method on button click.
I tried to hide it like this :-
$(this).hide();
The above solutions doesn't work & i also want some solution which is not jquery based.
HTML
<button class="btn-small" ng-click="updateData('contactinformation')" ng-show="contactinformationform.$dirty">Update</button>
CODE
$scope.updateData = function (category) {
switch (category) {
case 'basicinformation':
$scope.categorynewdata = $scope.data.basicinformation[0];
break;
case 'contactinformation':
$scope.categorynewdata = $scope.data.contactinformation[0]
break;
}
var query = {
category: category
};
Patients.updateData().save(query).$promise.then(function (data) {
alert('Data updated successfully..!');
});
}

You can use ng-hide in your button like this
Define scope variable (Like flag) so that you can decide when to hide/show button.
<button ng-click="btnClicked()" ng-hide="hideMe">Submit</button>
Controller
// Initialize hideMe variable
$scope.hideMe = false;
$scope.btnClicked = function() {
/* your code */
$scope.hideMe = true;
}

You can Try like this
Working Demo
html
<div ng-app='myApp' ng-controller="ArrayController">
<form>
<input type="text" ng-model="name" ng-change='flag=false' />: Name
<br>
<input type="text" ng-model="age" ng-change='flag=false' />: Age
<br>
<button class="btn-small" ng-click="updateData('contactinformation')" ng-hide='flag'>Update</button>
</form>
</div>
script
var app = angular.module('myApp', []);
app.controller('ArrayController', function ($scope) {
$scope.name = 'Manu';
$scope.age = '21';
$scope.flag = true;
$scope.updateData = function (value) {
$scope.flag = true;
}
});