I have a form that contains different fields : input, select, select multiple, buttons. And I was wondering if it would be a good idea (and actually feasible) to create a component for this form, this component would be like a container that can contains all type of form fields (input, select, button, etc...).
I have put a sample of code on plunker, what I would like to do is to create a component for the form, in which I could insert how many other component I want (button, input, etc..).
<!DOCTYPE html>
<html ng-app="MyApp">
<head>
<link data-require="bootstrap-css#3.3.6" data-semver="3.3.6" rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.css" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.6/angular.min.js"></script>
<script src="script.js"></script>
<script src="myInput.js"></script>
<script src="myButton.js"></script>
</head>
<body ng-controller="MyCtrl">
<div class="container">
<h2>My form</h2>
<form role="form">
<my-input label="Firstname"></my-input>
<my-input label="Lastname"></my-input>
<my-button label="Submit"></my-button>
</form>
</div>
</body>
</html>
If you are planning to reuse the form in other parts of your code, I would say it would be a good idea to create it as a component.
Otherwise, it's just a matter of preference. Sometimes it can be nice to divide large portions of code into different files.
Edit: Plunker example https://plnkr.co/edit/kyt9Q6L01r06dJXLDQZH?p=preview
<body ng-controller="MyCtrl">
<div class="container">
<my-form></my-form>
</div>
</body>
Edit 2: Updated the Plunker with an example of passing objects as attribute to the form
<body ng-controller="MyCtrl">
<div class="container">
<my-form inputlabels="inputs1"></my-form>
<my-form inputlabels="inputs2"></my-form>
</div>
</body>
If you mark "Yes" to these two questions then you should build a component:
Is it reusable?
Does the form has a unique logic?
Related
I am new in angularjs , i need to show a div having delete,rename and move buttons when is click an image(contained a ckeckbox) in a gallery.there are large number of image are present, i need to show the div atleast one checkbox is checked using angularjs.
try below code which should help you to solve your purpose:
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
</head>
<body ng-app>
<input type="checkbox" ng-click="isChecked = !isChecked;">Show Div</input>
<br>
<div style="width:200px;height:200px;" ng-show="isChecked">
Hello Div!!!
</div>
</body>
</html>
I'm a newbie to this thing called 'AngularJS' so I got stuck at one point.
Consider the below code sample :
<!DOCTYPE html>
<html>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<body>
<div ng-app="" ng-init="firstName='John'">
<p>Input something in the input box:</p>
<p>Name: <input type="text" ng-bind="firstName"></p>
<p>You wrote: {{ firstName }}</p>
</div>
</body>
</html>
In above example why can't I bind the value of application variable "firstName" to the HTML input text control usng "ng-bind"?
and suppose I write the code as below :
<!DOCTYPE html>
<html>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<body>
<div ng-app="" ng-init="firstName='John'">
<p>Input something in the input box:</p>
<p>Name: <input type="text" ng-model="firstName"></p>
<p>You wrote: {{ firstName }}</p>
</div>
</body>
</html>
In above example I can bind the value of application variable "firstName" to the HTML input conrol using "ng-model".
Can someone please clarify me the difference between the above two codes in easy to understand language?
Also, look at below code snippet :
<!DOCTYPE html>
<html>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<body>
<div ng-app="" ng-init="firstName='John'">
<p>The name is <span ng-bind="firstName"></span></p>
</div>
</body>
</html>
In the above(third) example how could I be able to bind the value of application variable "firstName" to the <p> tag?
Someone please explain me.
Thanks.
ng-bind makes a one way binding between your controller and the view. In this case, the view will only reflect changes made in the controller, but not viceversa. This is the same as using the double brackets notation {{variable}}
In the other hand, ng-model makes a double binding, that is, changes made in the view (normally in an input form), will be accesible automatically in the controller, and changes made in the controller will be updated in the view
check this answer: https://stackoverflow.com/a/12420157/5186787
In regard to the snippet, you could just do:
<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.0/angular.min.js"></script>
<body>
<div ng-app="myApp" ng-controller='myController'>
<p>{{firstName}}</p>
</div>
</body>
</html>
Which implements a one way bind. So, if you have your application defined in this way:
var app=angular.module('myApp',[]);
app.controller('myController', ['$scope',function($scope){
$scope.firstName = 'John Doe';
}]);
It would make a one-way binding between your variable firstName in the controller and the view.
It is better to use controllers for this type of work.
I have a simple form.
<html lang="en" ng-app="MyApp">
<head>
</head>
<body ng-controller="AppCtrl">
<form name="myForm" id="myForm">
<input type="text" ng-model="field" name="myField" />
<div ng-show="myForm.myField.$error" style="color: red">
{{myForm.myField.$error}}
</div>
</form>
<script src="bower_components/angular/angular.js"></script>
<script src="controller.js"></script>
</body>
</html>
And i have angular controller
angular.module('MyApp',[])
.controller('AppCtrl', function($scope) {
$scope.myForm.myField.$error = "just to see it work";
});
Why do I get error '$scope.myForm is undefined'?
You have model, module and controller a little confused. My solutions uses Angular 1.2, although you will soon need to move to Angular 2.
Here is my reworking of your example:
<html lang="en" ng-app="MyApp">
<head>
</head>
<body ng-controller="AppCtrl as ctrl">
<form name="myForm" id="myForm">
<input type="text" ng-model="ctrl.myField" name="myField" />
<div style="color: red">
{{ctrl.myField}}
</div>
</form>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.19/angular.min.js">
</script>
<script src="controller.js"></script>
</body>
</html>
And in the controller.js:
angular.module('MyApp',[])
.controller('AppCtrl', [function() {
this.myField = "just to see it work";
}]);
In the above, I have put "myField" in the scope of the controller "AppCtrl". I have put the whole page under the control of the module 'MyApp'. You can either inject the model with "ng-bind" or use the curly bracket notation in the body of the div to bind to the "myField" model of "ctrl". I have used the latter but be aware this binding will be established after the page has been parsed.
If you load this all now, you should see "just see it work" in red under the text field, and also inside the text field. When you edit the text box, the red text will change in sync. Once you have that working, you will never want to stop learning more about Angular!
I should add that this model has a single attribute. To generalise this you will need to create a model with several properties (one for each input element), so that a JSON object is returned when the form is submitted.
You can't have dots in your variable name.
Try myFormMyFieldError instead of myForm.myField.$error.
Additional: Rather than using the attribute style, use a CSS file.
I'm trying to use Angular Agility for form validation. I'm trying to get a simple example working with the correct error messages and colours outlining the form element. So far I'm not getting very far. I've had a look at the demo examples but there's no clear code examples, unless I'm doing something drastically wrong.
Can anyone show me an example of how to use this properly?
For example how would I be able to get the following html to show the error message and the validation outline around the form element?
From the documentation?
<div ng-form="exampleForm" class="form-horizontal">
<input type="number" aa-field-group="person.age" min="0" max="140" required>
</div>
Thanks in advance.
Assuming you have the angular.js and angular-agility.js, here is a working sample
<!Doctype html>
<head>
<link href="https://raw.githubusercontent.com/AngularAgility/AngularAgility/master/simple_example/aa.formExtensionsOptional.css" type="text/css" rel="stylesheet" />
</head>
<body>
<div ng-app="angularAgilitySimpleExample" ng-controller="indexCtrl">
<div ng-form="exampleForm">
<input type="number" aa-field-group="person.age" min="0" max="140" required>
</div>
</div>
<script type="text/javascript" src="angular.js"></script>
<script type="text/javascript" src="angular-agility.js"></script>
<script type="text/javascript">
angular.module('angularAgilitySimpleExample', ['aa.formExtensions', 'aa.notify']);
</script>
</body>
</html>
Incase, you do not see the styling, please download the css from https://raw.githubusercontent.com/AngularAgility/AngularAgility/master/simple_example/aa.formExtensionsOptional.css and use it locally
You can find the complete example from angular-agility team https://raw.githubusercontent.com/AngularAgility/AngularAgility/master/simple_example/index.html
This plnkr shows how to validate the firstname, show the error message and show green/red outline round the form element:
http://plnkr.co/edit/V4vDiu?p=preview
<!DOCTYPE html>
<html ng-app="exampleModule">
<head>
<link rel="stylesheet" href="style.css" />
<script src="http://code.angularjs.org/1.2.8/angular.js"></script>
<script src="aa.formExtensions.js"></script>
<script src="app.js"></script>
</head>
<body>
<div ng-controller="exampleController" ng-form="exampleForm">
<div>
<input type="text" required="" ng-minlength="2" ng-maxlength="30"
aa-auto-field="firstName" />
</div>
<button aa-save-form="save()">Save</button>
</div>
</body>
</html>
I am working through Pro AngularJS by Adam Freeman and have not been able to get the Using Checkboxes example to work.
The example tries to show that you can set attributes ng-true-value="Hurrah!" and ng-false-value="Boo!" and are displayed through ng-model="inputValue".
This is not working.
I am only able to get this sample to work by setting integer values inside ng-true-value and ng-false-value.
<!DOCTYPE html>
<html ng-app="exampleApp">
<head>
<title>Forms</title>
<script src="angular.js"></script>
<link href="bootstrap.css" rel="stylesheet" />
<link href="bootstrap-theme.css" rel="stylesheet" />
<script>
angular.module("exampleApp", [])
.controller("defaultCtrl", function ($scope) {});
</script>
</head>
<body>
<div id="todoPanel" class="panel" ng-controller="defaultCtrl">
<form name="myForm" novalidate>
<div class="well">
<div class="checkbox">
<label>
<input name="sample" type="checkbox" ng-model="inputValue"
ng-true-value="Hurrah!" ng-false-value="Boo!">
This is a checkbox
</label>
</div>
</div>
<div class="well">
<p>Model Value: {{inputValue}}</p>
</div>
</form>
</div>
</body>
</html>
According to the documentation for input[checkbox], ng-true-value and ng-false-value accept expressions. Since you are trying to pass a string literal as the value, you need to enclose them in an addional pair of quotes.
Try ng-true-value="'Hurrah!'" ng-false-value="'Boo!'"