buf.writeUIntLE(value, offset, byteLength)


  • value <integer> 要写入 buf 的数字。
  • offset <integer> 开始写入之前要跳过的字节数。 必须满足 0 <= offset <= buf.length - byteLength
  • byteLength <integer> 要写入的字节数。 必须满足 0 < byteLength <= 6
  • 返回: <integer> offset 加上写入的字节数。

valuebyteLength 个字节作为小端序写入 buf 中指定的 offset。 支持最高 48 位的精度。 当 value 不是无符号整数时,则行为未定义。

此函数也可在 writeUintLE 别名下使用。

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(6);

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

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

const buf = Buffer.allocUnsafe(6);

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

console.log(buf);
// 打印: <Buffer ab 90 78 56 34 12>
  • 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 - byteLength.
  • byteLength <integer> Number of bytes to write. Must satisfy 0 < byteLength <= 6.
  • Returns: <integer> offset plus the number of bytes written.

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

This function is also available under the writeUintLE alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(6);

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

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

const buf = Buffer.allocUnsafe(6);

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

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