buf.writeInt16BE(value[, offset])

• value <integer> 要写入 buf 的数字。
• offset <integer> 写入前要跳过的字节数。必须满足 0 <= offset <= buf.length - 2。默认值： 0。
• 返回值：<integer> offset 加上写入的字节数。

将 value 以大端格式写入指定 offset 的 buf。value 必须是有效的有符号 16 位整数。当 value 不是有符号 16 位整数时，行为未定义。

【Writes value to buf at the specified offset as big-endian. The value must be a valid signed 16-bit integer. Behavior is undefined when value is anything other than a signed 16-bit integer.】

value 被解释并写入为二进制补码有符号整数。

【The value is interpreted and written as a two's complement signed integer.】

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(2);

buf.writeInt16BE(0x0102, 0);

console.log(buf);
// Prints: <Buffer 01 02>const { Buffer } = require('node:buffer');

const buf = Buffer.allocUnsafe(2);

buf.writeInt16BE(0x0102, 0);

console.log(buf);
// Prints: <Buffer 01 02>拷贝