Node.js zlib.deflateRaw() Method

Last Updated : 12 Oct, 2021

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:

javascript

// 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:

javascript

// 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);  } });