buf.writeBigInt64BE(value[, offset])

• value <bigint> 要写入 buf 的数字。

  ¥value <bigint> Number to be written to buf.

• offset <integer> 开始写入之前要跳过的字节数。必须满足：0 <= offset <= buf.length - 8。默认值：0。

  ¥offset <integer> Number of bytes to skip before starting to write. Must satisfy: 0 <= offset <= buf.length - 8. Default: 0.

• 返回：<integer> offset 加上写入的字节数。

  ¥Returns: <integer> offset plus the number of bytes written.

将 value 作为大端序写入 buf 中指定的 offset。

¥Writes value to buf at the specified offset as big-endian.

value 被解释和写入为二进制补码有符号整数。

¥value is interpreted and written as a two's complement signed integer.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(8);

buf.writeBigInt64BE(0x0102030405060708n, 0);

console.log(buf);
// Prints: <Buffer 01 02 03 04 05 06 07 08>const { Buffer } = require('node:buffer');

const buf = Buffer.allocUnsafe(8);

buf.writeBigInt64BE(0x0102030405060708n, 0);

console.log(buf);
// Prints: <Buffer 01 02 03 04 05 06 07 08>拷贝