Forms in AJS

Introduction of Forms in AJS

• These are just some of the basic features of forms in AngularJS.

Definition of Forms in AJS

• In AngularJS, forms are an essential part of building interactive web applications.
• AngularJS provides powerful features for creating and managing forms, including data binding, validation, and submission handling. 

Features of Forms in AJS

•  With AngularJS’s form support, we can create complex, interactive forms with ease, handling validation, submission, and data binding efficiently.

Form’s Directives in AJS

• Here’s a brief overview of forms in AngularJS:

• • ngModel Directive:
    • AngularJS uses the ngModel directive to bind form controls to properties in the scope.
    • This allows for two-way data binding, meaning changes in the UI are reflected in the model and vice versa.
    • For example: <input type=”text” ng-model=”username”>
  • Form Control Directives:
    • AngularJS provides various directives to work with form controls, such as input, textarea, select, and checkbox.
    • These directives can be combined with ngModel to create interactive forms:-
      • <form>
             <input type=”text” ng-model=”username” required>
             <input type=”password” ng-model=”password” required>
             <button ng-click=”login()”>Login</button>
        </form> 
  • Validation:
    • AngularJS supports both built-in and custom validation for form controls.
    • We can use attributes like required, minlength, maxlength, pattern, etc., to enforce validation rules.
    • AngularJS automatically adds CSS classes (ng-valid, ng-invalid, ng-pristine, ng-dirty, etc.) to form controls based on their validity state:-
      • <form name=”myForm”>
             <input type=”email” ng-model=”email” name=”email” required>
             <div ng-show=”myForm.email.$error.required”>Email is required</div>
             <div ng-show=”myForm.email.$error.email”>Invalid email format</div>
        </form> 
  • Form Submission:
    • AngularJS provides the ngSubmit directive to handle the form submission.
    • It allows us to execute functions defined in the controller when the form is submitted:-
      • <form ng-submit=”submitForm()”>
              <!– Form fields here –>
              <button type=”submit”>Submit</button>
        </form> 
  • Form Controller:
    • AngularJS creates a form controller behind the scenes for each form using the ngForm directive.
    • This controller allows us to access form properties and methods programmatically from within your controller:-