path 模块是处理路径的相关操作。
可以在这个链接里面看path 模块的API http://nodejs.cn/api/path.html
先来试一下 path.normalize 函数,它可以把路径中不规范的地方矫正过来,如下。
const { normalize } = require('path');
console.log(normalize('/user//local/bin'));
console.log(normalize('/user/local/../bin'));
然后看一下 path.join 函数,路径合并,它里面自带normalize 功能。
const { normalize, join } = require('path');
console.log(join("/user","local","data"));
console.log(join("/user","../local","data"));
console.log(join("/user/","/local/","data"));
然后看一下 path.resolve 函数,它主要是把相对路径转化为绝对路径。
const { resolve, normalize, join } = require('path');
console.log(resolve('./'));
然后,看一下关于文件名的函数 basename extname dirname
const { basename, dirname, extname, resolve, normalize, join } = require('path');
const filePath = "/user/local/bin/aaa.txt";
console.log(basename(filePath));
console.log(dirname(filePath));
console.log(extname(filePath));
parse 与 format 方法,相互反函数。