Node.js Buffer.isEncoding() Method

The Buffer.isEncoding() method checks whether the given encoding is supported or not. This method returns a Boolean value either true or false.

Syntax:

Buffer.isEncoding( encoding )

Parameters: This method accepts single parameter encoding which holds the encoding name. The supported encoding are ascii, utf8, utf16le, ucs2, base64, latin1, binary etc.

Example 1:

// Node.js program to demonstrate the
// Buffer.isEncoding() method

// Displays whether the given encoding
// is supported or not
console.log(Buffer.isEncoding('utf8'));
console.log(Buffer.isEncoding('utf16le'));
console.log(Buffer.isEncoding('ascii'));
console.log(Buffer.isEncoding('asciivalue'));
console.log(Buffer.isEncoding('base64'));
console.log(Buffer.isEncoding('basename'));

Output:

true
true
true
false
true
false

Example 2:

// Node.js program to demonstrate the
// Buffer.isEncoding() method

// Displays whether the given encoding
// is supported or not
console.log(Buffer.isEncoding('ucs2'));
console.log(Buffer.isEncoding('name'));
console.log(Buffer.isEncoding('binary'));
console.log(Buffer.isEncoding('latin1'));
console.log(Buffer.isEncoding('base64'));

Output:

true
false
true
true
true

Note: The above program will compile and run by using the node index.js command.

Reference: https://nodejs.org/api/buffer.html#buffer_class_method_buffer_isencoding_encoding