Node.js zlib.deflateRaw() Method

The zlib.deflateRaw() method is an inbuilt application programming interface of the Zlib module which is used to compress a chunk of data.

Syntax:

zlib.deflateRaw( buffer, options, callback )

Parameters: This method accepts three parameters as mentioned above and described below:

• buffer: It can be of type Buffer, TypedArray, DataView, ArrayBuffer, and string.
• options: It is an optional parameter that holds the zlib options.
• callback: It holds the callback function.

Return Value: It returns the chunk of data after compression.

Below examples illustrate the use of zlib.deflateRaw() method in Node.js:

Example 1:

// Node.js program to demonstrate the
// deflateRaw() method

// Including zlib module
const zlib = require("zlib");

// Declaring input and assigning
// it a value string
var input = "Nidhi Singh";

// Calling deflateRaw method
zlib.deflateRaw(input, (err, buffer) => {

    console.log(buffer.toString('hex'));

});

Output:

f3cb4cc9c85408cecc4bcf0000

Example 2:

// Node.js program to demonstrate the
// deflateRaw() method

// Including zlib module
const zlib = require("zlib");

// Declaring input and assigning
// it a value string
var input = "GeeksforGeeks";

// Calling deflateRaw method
zlib.deflateRaw(input, (err, buffer) => {

  if(!err) {
    console.log(buffer.toString('hex'));
  }
  else {
    console.log(err);
  }
});

Output:

734f4dcd2e4ecb2f7207d100

Reference: https://nodejs.org/api/zlib.html#zlib_zlib_deflateraw_buffer_options_callback