buf.writeInt8(value[, offset])

• 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 - 1。默认值：0。

  ¥offset <integer> Number of bytes to skip before starting to write. Must satisfy 0 <= offset <= buf.length - 1. 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 写入 buf 中指定的 offset。value 必须是有效的有符号 8 位整数。当 value 不是有符号的 8 位整数时，则行为未定义。

¥Writes value to buf at the specified offset. value must be a valid signed 8-bit integer. Behavior is undefined when value is anything other than a signed 8-bit integer.

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(2);

buf.writeInt8(2, 0);
buf.writeInt8(-2, 1);

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

const buf = Buffer.allocUnsafe(2);

buf.writeInt8(2, 0);
buf.writeInt8(-2, 1);

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