Node.js | util.types.isSharedArrayBuffer() Method Last Updated : 14 Feb, 2020 Comments Improve Suggest changes Like Article Like Report The util.types.isSharedArrayBuffer() method of util module is primarily designed to support the needs of Node.js own Internal APIs. It is used to check whether the passed instance in the method is a built-in SharedArrayBuffer instance or not. Syntax: util.types.isSharedArrayBuffer( value ) Parameters: This method accepts a single parameter value which holds any value i.e instance of any module. Return value: This method returns a Boolean value i.e true if the passed value is instance of SharedArrayBuffer otherwise returns false. Below examples illustrate the use of util.types.isSharedArrayBuffer() method in Node.js: Example 1: javascript // Node.js program to demonstrate the // util.types.isSharedArrayBuffer() method // It includes util module const util = require('util'); // Return true as passed instance // is of SharedArrayBuffer console.log(util.types.isSharedArrayBuffer( new SharedArrayBuffer())); // Return false as passed instance // is of Int32Array console.log(util.types.isSharedArrayBuffer( new Int32Array())); // Return false as the passed instance is // of ArrayBuffer, not SharedArrayBuffer console.log(util.types.isSharedArrayBuffer( new ArrayBuffer())); Output: true false false Example 2: javascript // Node.js program to demonstrate the // util.types.isSharedArrayBuffer() method // It includes util module const util = require('util'); // making an instance of SharedArrayBuffer // of size 1024 var sab = new SharedArrayBuffer(1024); // Return true as passed instance is // of SharedArrayBuffer console.log(util.types.isSharedArrayBuffer(sab)); // Return true as slice method return new // instance of sharedArrayBuffer console.log(util.types.isSharedArrayBuffer( sab.slice(100, 199))); Output: true true Reference: https://nodejs.org/api/util.html#util_util_types_issharedarraybuffer_value Comment More infoAdvertise with us Next Article Node.js | util.types.isSharedArrayBuffer() Method A akshajjuneja9 Follow Improve Article Tags : Web Technologies Node.js Node.js-util-module Similar Reads Node.js Utility Module The util module in Node.js provides a variety of utility functions that assist with tasks such as debugging, formatting, and inheritance. 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