buf.writeInt8(value, offset)


  • value <integer> 要写入 buf 的数值。
  • offset <integer> 开始写入的偏移量。必须满足0 <= offset <= buf.length - 1
  • 返回: <integer> offset 加上已写入的字节数。

value 写入到 buf 中指定的 offset 位置。 value 必须是有符号的 8 位整数。

const buf = Buffer.allocUnsafe(2);

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

console.log(buf);
// 输出: <Buffer 02 fe>
  • value <integer> Number to be written to buf.
  • offset <integer> Number of bytes to skip before starting to write. Must satisfy 0 <= offset <= buf.length - 1.
  • Returns: <integer> offset plus the number of bytes written.

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

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

const buf = Buffer.allocUnsafe(2);

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

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