js path 路径操作

const path = require('path');

// 拼接路径
let combinedPath = path.join(__dirname, 'folder', 'file.txt');
console.log(combinedPath); // 输出: /current/directory/folder/file.txt (Unix-like) 或 \current\directory\folder\file.txt (Windows)

// 解析路径
let resolvedPath = path.resolve('folder', 'file.txt');
console.log(resolvedPath); // 输出: /current/directory/folder/file.txt (Unix-like) 或 \current\directory\folder\file.txt (Windows)

// 获取文件名和目录名
let fileName = path.basename(combinedPath);
let dirName = path.dirname(combinedPath);
console.log(fileName); // 输出: file.txt
console.log(dirName);  // 输出: /current/directory/folder (Unix-like) 或 \current\directory\folder (Windows)

// 格式化路径对象
let formattedPath = path.format({
  dir: '/root',
  base: 'file.txt'
});
console.log(formattedPath); // 输出: /root/file.txt

// 检查路径是否为绝对路径
let isAbsolute = path.isAbsolute('/root/file.txt');
console.log(isAbsolute); // 输出: true

// 错误的路径拼接方式
let wrongPath = '/' + 'folder' + '/' + 'file.txt'; // 可能会导致多余的斜杠

// 正确的路径拼接方式
let correctPath = path.join('/', 'folder', 'file.txt'); // 自动处理多余斜杠