buf.writeIntBE(value, offset, byteLength)

• value <integer> 要写入 buf 的数字。

  ¥value <integer> 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 - byteLength。

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

• byteLength <integer> 要写入的字节数。必须满足 0 < byteLength <= 6。

  ¥byteLength <integer> Number of bytes to write. Must satisfy 0 < byteLength <= 6.

• 返回：<integer> offset 加上写入的字节数。

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

将 value 的 byteLength 个字节作为大端序写入 buf 中指定的 offset。支持最高 48 位的精度。当 value 不是有符号整数时，则行为未定义。

¥Writes byteLength bytes of value to buf at the specified offset as big-endian. Supports up to 48 bits of accuracy. Behavior is undefined when value is anything other than a signed integer.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(6);

buf.writeIntBE(0x1234567890ab, 0, 6);

console.log(buf);
// Prints: <Buffer 12 34 56 78 90 ab>const { Buffer } = require('node:buffer');

const buf = Buffer.allocUnsafe(6);

buf.writeIntBE(0x1234567890ab, 0, 6);

console.log(buf);
// Prints: <Buffer 12 34 56 78 90 ab>拷贝