Node.js zlib.gunzipSync() Method

The zlib.gunzipSync() method is an inbuilt application programming interface of the Zlib module which is used to decompress a chunk of data with Gunzip. 

Syntax:

zlib.gunzipSync( buffer, options )

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

• buffer: This parameter holds the buffer of type Buffer, TypedArray, DataView, ArrayBuffer, and string.
• options: This parameter holds the value of the zlib option.

Return Value: It returns the chunk of data with Gunzip. 

The below examples illustrate the use of zlib.gunzipSync() method in Node.js: 

Example 1:

javascript

// Node.js program to demonstrate the
// zlib.gunzipSync() method

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

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

// Calling gzipSync method
const gzi = zlib.gzipSync(input);

// Calling gunzipSync method
const decom = zlib.gunzipSync(
    new Buffer.from(gzi)).toString();

console.log(decom);

Output:

Nidhi

Example 2:

javascript

// Node.js program to demonstrate the
// zlib.gunzipSync() method

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

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

// Calling gzipSync method
const gzi = zlib.gzipSync(input).toString('hex');

// Calling gunzipSync method
const decom = zlib.gunzipSync(new Buffer.from(
        gzi, 'hex')).toString('base64');

console.log(decom);

Output:

TmlkaGk=

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