Node.js util.types.isInt8Array() Method

The util.types.isInt8Array() method is an inbuilt application programming interface of the util module which is used to type check for Int8Array in the node.js. 

Syntax:

util.types.isInt8Array( value )

Parameters: This method accepts a single parameter as mentioned above and described below.

• value: It is a required parameter that holds any data type.

Return Value: It returns a boolean value, TRUE if the value is an Int8Array object, FALSE otherwise. 

Example 1: The below example illustrates the use of util.types.isInt8Array() method in Node.js

javascript

// Node.js program to demonstrate the
// util.types.isInt8Array() Method

// Allocating util module
const util = require('util');

// Value to be passed as parameter of
// util.types.isInt8Array() method
let v1 = new BigInt64Array();
let v2 = new BigUint64Array();
let v3 = new Float32Array();
let v4 = new ArrayBuffer();
let v5 = new Int8Array();

// Printing the returned value from
// util.types.isInt8Array() method
console.log(util.types.isInt8Array(v1));
console.log(util.types.isInt8Array(v2));
console.log(util.types.isInt8Array(v3));
console.log(util.types.isInt8Array(v4));
console.log(util.types.isInt8Array(v5));

Output:

false
false
false
false
true

Example 2: In this example, we illustrate the use of util.types.isInt8Array() method in Node.js

javascript

// Node.js program to demonstrate the
// util.types.isInt8Array() Method

// Allocating util module
const util = require('util');

// Value to be passed as parameter of
// util.types.isInt8Array() method
let v1 = new Int8Array();
let v2 = new Int16Array();

// Calling util.types.isInt8Array() method
if (util.types.isInt8Array(v1))
    console.log("The passed value is a Int8Array.");
else
    console.log("The passed value is not a Int8Array");

if (util.types.isInt8Array(v2))
    console.log("The passed value is a Int8Array.");
else
    console.log("The passed value is not a Int8Array");

Output:

The passed value is a Int8Array.
The passed value is not a Int8Array

Note: The above program will compile and run by using the node filename.js command. 

Reference: https://nodejs.org/api/util.html#util_util_types_isint8array_value