fs 模块能够以标准 POSIX 函数为模型的方式与文件系统进行交互。
Source Code: lib/fs.js
fs module enables interacting with the file system in a
way modeled on standard POSIX functions.
To use the promise-based APIs:
import * as fs from 'fs/promises';
const fs = require('fs/promises');
To use the callback and sync APIs:
import * as fs from 'fs';
const fs = require('fs');
All file system operations have synchronous, callback, and promise-based forms, and are accessible using both CommonJS syntax and ES6 Modules (ESM).