Node.js – util.types.isArrayBufferView() Method

The util.types.isArrayBufferView() checks whether the passed value is an instance of the ArrayBuffer views, or typed array objects like DataView. This method returns True if the above conditions are satisfied, else it returns False.

Syntax

util.types.isArrayBufferView(value)

Parameters

It takes only one parameter −

• value − This input parameter takes input for the required datatype and checks if it is an ArrayBuffer or a typed array object

It returns True or False based upon the input value passed.

Example 1

Create a file with the name "isArrayBufferView.js" and copy the following code snippet. After creating the file, use the command "node isArrayBufferView.js" to run this code.

// util.types.isArrayBufferView() Demo Example

// Importing the util module
const util = require('util');

// Defining only types module from util
const {types} = require('util');

// Passing ArrayBuffer as input parameter
console.log("1. ", util.types.isArrayBufferView(new ArrayBuffer()));

// Passing the buffer parameter with value
console.log("2. ",
util.types.isArrayBufferView(Buffer.from('tutorials point')));

// Passing a Float64Array
console.log("3. ", util.types.isArrayBufferView(new Float64Array()));

// Passing SharedArrayBuffer as input parameter
console.log("4. ", util.types.isArrayBufferView(new
SharedArrayBuffer()));

Output

C:\home\node>> node isArrayBufferView.js
1. false
2. true
3. true
4. false

Example 2

// util.types.isArrayBufferView() Demo Example

// Importing the util module
const util = require('util');

// Defining only types module from util
const {types} = require('util');

// Defining some common buffers

// Create a 16byte buffer
var buffer = new ArrayBuffer(16);

// Create a DataView referring to the buffer
var buffer1 = new DataView(buffer);

// Create a Int8Array view referring to the buffer
var buffer2 = new Int8Array(buffer);

// Put value of 32bits
buffer1.setInt32(0, 0x76543210);

// Passing ArrayBuffer as input parameter
console.log("1. ", util.types.isArrayBufferView(buffer));

// Passing the buffer parameter with value
console.log("2. ", util.types.isArrayBufferView(buffer1));

// Passing a Float64Array
console.log("3. ", util.types.isArrayBufferView(new Float64Array()));

// Passing SharedArrayBuffer as input parameter
console.log("4. ", util.types.isArrayBufferView(buffer2));

Output

C:\home\node>> node isArrayBufferView.js
1. false
2. true
3. true
4. true