VIP20/19_Node.js/day-2/code/learn:fs.mjs

import { writeFile, appendFile, readFile } from 'node:fs/promises';

/**
 *! writeFile 写
 */
export async function writeFileAsync() {
  try {
    await writeFile('./log.txt', 'heheda');
    console.log('写入成功');
  } catch (error) {
    console.error('写入失败：', error);
  }
}

/**
 *! appendFile 向文件末尾追加内容
 */

export async function appendFileAsync(data = '') {
  try {
    await appendFile('./log.append.txt', data);
    console.log('写入成功');
  } catch (error) {
    console.error('写入失败：', error);
  }
}

/**
 *! readFile 读取文件内容
 */

export async function readFileAsync() {
  try {
    // 默认读取的内容 是 二进制数据的16进制编码 数据
    // let content = await readFile('./log.append.txt');
    let content = await readFile('./log.append.txt', 'utf8');

    console.log(content);
  } catch (error) {}
}