Buffer.readBigUInt64BE - buffer - Node documentation

Node

buffer

readBigUInt64BE

method Buffer.readBigUInt64BE

#Buffer.readBigUInt64BE(offset?: number): bigint

Reads an unsigned, big-endian 64-bit integer from buf at the specifiedoffset.

This function is also available under the readBigUint64BE alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.from([0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff]);

console.log(buf.readBigUInt64BE(0));
// Prints: 4294967295n

Parameters #

optional

#offset: number = 0

Number of bytes to skip before starting to read. Must satisfy: 0 <= offset <= buf.length - 8.

Return Type #

bigint