Node.js zlib.createDeflate() Method Last Updated : 12 Oct, 2021 Suggest changes Share Like Article Like Report The zlib.createDeflate() method is an inbuilt application programming interface of the Zlib module which is used to create a new Deflate object. Syntax: zlib.createDeflate( options ) Parameters: This method accepts single parameter options which is an optional parameter that holds the zlib options. Return Value: It returns a new Deflate object. Below examples illustrate the use of zlib.createDeflate() method in Node.js: Example 1: javascript // Node.js program to demonstrate the // createDeflate() method // Including zlib and fs module const zlib = require("zlib"); const fs = require('fs'); // Creating readable Stream const inp = fs.createReadStream('input.txt'); // Creating writable stream const out = fs.createWriteStream('input.txt.gz'); // Calling createDeflate method const def = zlib.createDeflate(); // Piping inp.pipe(def).pipe(out); console.log("Program Completed!"); Output: Program Completed! Example 2: javascript // Node.js program to demonstrate the // createDeflate() method // Including zlib and fs module const zlib = require("zlib"); const fs = require('fs'); // Creating readable Stream const inp = fs.createReadStream('input.txt'); // Creating writable stream const out = fs.createWriteStream('input.txt.gz'); // Calling createDeflate method const def = zlib.createDeflate(); // Piping inp.pipe(out).pipe(def); console.log("Program Completed!"); Output: Error [ERR_STREAM_CANNOT_PIPE]: Cannot pipe, not readable at WriteStream.Writable.pipe (_stream_writable.js:243:24) at /home/runner/CorruptFlawedSoftwaresuite/index.js:19:15 at Script.runInContext (vm.js:133:20) at Object. (/run_dir/interp.js:156:20) at Module._compile (internal/modules/cjs/loader.js:778:30) at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10) at Module.load (internal/modules/cjs/loader.js:653:32) at tryModuleLoad (internal/modules/cjs/loader.js:593:12) at Function.Module._load (internal/modules/cjs/loader.js:585:3) Here, piping is not done in a proper order so, error is thrown. Reference: https://nodejs.org/api/zlib.html#zlib_zlib_createdeflate_options N nidhi1352singh Follow Article Tags : Web Technologies Node.js Node.js-Zlib-module Explore Node.js Tutorial 3 min read Introduction & Installation NodeJS Introduction 3 min read Node.js Roadmap: A Complete Guide 6 min read How to Install Node.js on Linux 6 min read How to Install Node.js on Windows 5 min read How to Install NodeJS on MacOS 6 min read Node.js vs Browser - Top Differences That Every Developer Should Know 6 min read NodeJS REPL (READ, EVAL, PRINT, LOOP) 4 min read Explain V8 engine in Node.js 7 min read Node.js Web Application Architecture 3 min read NodeJS Event Loop 5 min read Node.js Modules , Buffer & StreamsNodeJS Modules 5 min read What are Buffers in Node.js ? 4 min read Node.js Streams 4 min read Node.js Asynchronous ProgrammingAsync Await in Node.js 3 min read Promises in NodeJS 7 min read How to Handle Errors in Node.js ? 4 min read Exception Handling in Node.js 3 min read Node.js NPMNodeJS NPM 6 min read Steps to Create and Publish NPM packages 7 min read Introduction to NPM scripts 2 min read Node.js package.json 4 min read What is package-lock.json ? 3 min read Node.js Deployments & CommunicationNode Debugging 2 min read How to Perform Testing in Node.js ? 2 min read Unit Testing of Node.js Application 5 min read NODE_ENV Variables and How to Use Them ? 2 min read Difference Between Development and Production in Node.js 3 min read Best Security Practices in Node.js 4 min read Deploying Node.js Applications 5 min read How to Build a Microservices Architecture with NodeJS 3 min read Node.js with WebAssembly 3 min read Resources & ToolsNode.js Web Server 6 min read Node Exercises, Practice Questions and Solutions 4 min read Node.js Projects 9 min read NodeJS Interview Questions and Answers 15+ min read My Profile ${profileImgHtml} My Profile Edit Profile My Courses Join Community Transactions Logout Like