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Angular JS Form Validation:-

1) Form Validation :-



2) Angular js Form Validation :-



Angular JS Support HTML 5 Validation and it is used to manage State of Validation error according to events.



It contain predefined variable to handle validation process.


  • $untouched The field has not been touched yet
  • $touched The field has been touched
  • $pristine The field has not been modified yet
  • $dirty The field has been modified
  • $invalid The field content is not valid
  • $valid The field content is valid
Example of Angular Js Form validation using Name and Emailid Id Field
   <!DOCTYPE html>
<html>
<head>
<title></title>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"> </script>

</head>
<body>
<div ng-app=""> 
<form name="frm">
<input type="text" name="n" ng-model="n" required>

<span ng-show="frm.n.$touched && frm.n.$invalid"> Enter fullname</span>
<br><br>
<input type="email" name="e" ng-model="e">
<br><br>
<span ng-show="frm.e.$touched && frm.e.$invalid"> Enter valid emailid</span>

</form>
</div>
</body>
</html>

.............................................................................................

Angular JS directive elements of validation is used to provide style and color using css tag.


we can override these attribute to modify color and style.



The following classes are added to, or removed from, input fields:

  • ng-untouched The field has not been touched yet
  • ng-touched The field has been touched
  • ng-pristine The field has not been  modified yet
  • ng-dirty The field has been modified
  • ng-valid The field content is valid
  • ng-invalid The field content is not valid
  • ng-valid-key One key for each validation. Example: ng-valid-required, useful when there are more than one thing that must be validated
  • ng-invalid-key Example: ng-invalid-required

...............................................................................................................

Example of ng-valid,ng-invalid:-

<!DOCTYPE html>
<html>
<head>
<title></title>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"> </script>

    <style type="text/css">
    input.ng-invalid
    {
             background-color: cyan;

    }
input.ng-valid
    {
             background-color: yellow;

    }


    </style>

</head>
<body>
<div ng-app=""> 
<form name="frm">
<input type="text" name="n" ng-model="n" required="">


</form>
</div>
</body>

</html>





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