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AngularJS textarea Directive

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  • Last Updated : 24 Aug, 2022
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The <textarea> element’s behavior can be controlled & manipulated with the help of AngularJS data-binding. For this, the ng-model attribute is used with this element. Textarea elements provide validation and basic state control. The ng-model attribute makes reference to text-directive. The current state of textarea elements is held by Angular JS. The list of states of the Textarea directive is described below:

  • $touched: It signifies a touched field.
  • $untouched: It signifies an untouched field.
  • $valid: It signifies valid field content.
  • $invalid: It signifies invalid field content.
  • $dirty: It signifies a modification in field content.
  • $pristine: It signifies unmodified field content.

Syntax:

<textarea ng-model="name"></textarea>

Properties: Classes are used to style Textarea elements depending on the state they hold. The ng-model attribute is used to make reference to text-directive. Listed below are the commonly used classes:

  • ng-touched: It signifies class applied on the touched field.
  • ng-untouched: It signifies class applied on the untouched field.
  • ng-valid: It signifies class applied on valid field content.
  • ng-invalid: It signifies class used for invalid field content.
  • ng-pristine: It signifies class used for the state having a modification in the field.
  • ng-dirty: It signifies class used with unmodified field content.

Return Value: It returns the text, the user has entered in the text field. 

Example 1: This example describes the basic usage of the textarea Directive in AngularJS.

HTML




<!DOCTYPE html>
<html>
  
<head>
    <script src=
    </script>
    <style>
        body {
            text-align: center;
            font-family: Arial, Helvetica, sans-serif;
        }
  
        h1 {
            color: green;
        }
  
        textarea.ng-valid {
            color: green;
            background-color: lightgreen;
        }
  
        textarea.ng-invalid {
            background-color: lightblue;
        }
    </style>
</head>
  
<body ng-app="">
    <h1>GeeksforGeeks</h1>
    <h3>Textarea Directive</h3>
    <p><b>Textarea field:</b></p>
    <textarea placeholder="Start typing..."
              ng-model="gfg" required>
    </textarea>
</body>
</html>


Output: 

 

Example 2: In this example, we have used the .ng-pristine class, which specifies the form has not been modified by the user, & .ng-dirty class, which specifies the form has been made dirty (modified ) by the user, is utilized with the textarea element in AngularJS.

HTML




<!DOCTYPE html>
<html>
  
<head>
    <script src=
    </script>
    <style>
        body {
            text-align: center;
            font-family: Arial, Helvetica, sans-serif;
        }
  
        h1 {
            color: green;
        }
  
        textarea.ng-dirty {
            color: green;
            background-color: lightgreen;
        }
  
        textarea.ng-pristine {
            background-color: green;
        }
    </style>
</head>
  
<body ng-app="">
    <h1>GeeksforGeeks</h1>
    <h3>Textarea Directive</h3>
    <p><b>Textarea field:</b></p>
    <textarea placeholder="Start typing..." 
              ng-model="gfg" required>
    </textarea>
</body>
</html>


Output: 

 

Reference: https://docs.angularjs.org/api/ng/directive/textarea


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