Node.js Buffer.toJSON() Method

Buffer is a temporary memory storage which stores the data when it is being moved from one place to another. It is like the array of integers.

The Buffer.toJSON() method returns the buffer in JSON format.

Note: The JSON.Stringify() is the method which can also be used to return the data in JSON format. When we call the JSON.Stringify() method, it directly in the background calls the buffer.toJSON() Method.

Syntax:

buffer.toJSON()

Return Value: It returns the buffer in JSON format.

Below examples illustrate the use of Buffer.toJSON() method in Node.js:

Example 1:

// Node.js program to demonstrate the
// Buffer.toJSON() Method

var buffer = Buffer.from('GeeksforGeeks');

// Prints: the ascii values of each
// character of 'GeeksforGeeks'
console.log(buffer.toJSON());

Output:

{
  type: 'Buffer',
  data: [
     71, 101, 101, 107,
    115, 102, 111, 114,
     71, 101, 101, 107,
    115
  ]
}

Example 2: This example implements the use of JSON.Stringify() method.

// Node.js program to demonstrate the
// Buffer.toJSON() Method

const buffer = Buffer.from([1, 2, 3, 4]);

const output = JSON.stringify(buffer);

// Prints: {"type":"Buffer", "data":[1, 2, 3, 4]}
console.log(output);

Output:

{"type":"Buffer", "data":[1, 2, 3, 4]}

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

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