TextDecoder Web API | TextDecoder constructor

Last Updated : 04 Oct, 2019

In HTML there is a TextDecoder Interface of which we can create a TextDecoder object for the encoding specified in parameter.

Syntax:

decoder = new TextDecoder( utf-Label, option );

Parameters: This constructor accepts two parameters which are mentioned above and described below:

utf-Label: Label of the encoder in string format. It is “utf-8” as default.
option: TextDecoderOptions dictionary which has a property fatal (It is a Boolean flag which indicates if the TextDecoder.decode() method should throw DOMException. It’s default value is false.)

Example 1: This example creating a TextDecoder object with “iso-8859-2” as parameter.

<!DOCTYPE html> 
<html> 
  
<head> 
    <title>  
        TextDecoder Web API | TextDecoder constructor 
    </title>  
</head> 
  
<body> 
    <center> 
        <h1 style="color:green;">  
            GeeksforGeeks  
        </h1> 
  
        <h2>TextDecoder constructor</h2> 
          
        <button onclick="gettextDecoder ();"> 
            Get textDecoder object 
        </button> 
          
        <p id='textDecoder'></p> 
      
        <script type="text/javascript"> 
            function gettextDecoder() { 
                var textDecoder1 = new TextDecoder("iso-8859-2"); 
      
                console.log(textDecoder1); 
            } 
        </script> 
    </center> 
</body> 
  
</html> 

Output:

Before Click the button:
After Click the button:

Example: Create a comment object with nothing as parameter. So the default parameter which is “utf-8” will be taken.

<!DOCTYPE html> 
<html> 
  
<head> 
    <title>  
        TextDecoder Web API | TextDecoder constructor 
    </title>  
</head> 
  
<body> 
    <center> 
        <h1 style="color:green;">  
            GeeksforGeeks  
        </h1> 
  
        <h2>TextDecoder constructor</h2> 
          
        <button onclick="gettextDecoder ();"> 
            Get textDecoder object 
        </button> 
          
        <p id='textDecoder'></p> 
      
        <script type="text/javascript"> 
            function gettextDecoder() { 
                var textDecoder1 = new TextDecoder(); 
  
                console.log(textDecoder1); 
            } 
        </script> 
    </center> 
</body> 
  
</html> 