AngularJS ng-model Directive

The ng-model directive is used to bind application data to the values of HTML controls (input, select, textarea).

ng-model Directive

ng-modelDirectives can bind the values of input fields to variables created by AngularJS.

AngularJS Examples

<div ng-app="myApp" ng-controller="myCtrl">
Name:<input ng-model="name">
</div>

<script>
var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
    $scope.name = "John Doe";
});
</script>

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Two-way Binding

Two-way binding: when the value of the input field is modified, the value of the AngularJS property will also be modified:

AngularJS Examples

<div ng-app="myApp" ng-controller="myCtrl">
Name:<input ng-model="name">
    <h1>You entered:{{name}}</h1>
</div>

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Validate user input

AngularJS Examples

<form ng-app="" name="myForm">
    Email:
    <input type="email" name="myAddress" ng-model="text">
    <span ng-show="myForm.myAddress.$error.email">Not a valid email address</span>
</form>

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In the above example, the prompt message will be displayedng-showProperty returnstrueunder the following conditions.

Applied state

ng-modelThe directive can provide state values for application data (invalid, dirty, touched, error):

AngularJS Examples

<form ng-app="" name="myForm" ng-init="myText = '[email protected]'"> Email: <input type="email" name="myAddress" ng-model="myText" required> <p>Edit the email address to see the state changes.</p> <h1>State</h1> <p>Valid: {{myForm.myAddress.$valid}} (true if the input value is valid).</p> <p>Dirty: {{myForm.myAddress.$dirty}} (true if the value has changed).</p> <p>Touched: {{myForm.myAddress.$touched}} (true if clicked via touch screen).</p>

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CSS Classes

ng-modelDirectives provide CSS classes to HTML elements based on their state:

AngularJS Examples

<style>
input.ng-invalid {
    background-color: lightblue;
}
</style>
<body>

<form ng-app="" name="myForm">
Enter your name:
    <input name="myAddress" ng-model="text" required>
</form>

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ng-modelDirectives add/remove the following classes based on the state of the form fields:

  • ng-empty
  • ng-not-empty
  • ng-touched
  • ng-untouched
  • ng-valid
  • ng-invalid
  • ng-dirty
  • ng-pending
  • ng-pristine
other extensions