path node

process.cwd()

当前Node.js进程执行时的工作目录

__dirname

当前模块的目录名

const path = require('path');

console.log(__dirname) // e:\ssy-node\ssy-node-koa\src

console.log(__filename) // e:\ssy-node\ssy-node-koa\src\index.js

console.log(process.cwd()) // e:\ssy-node\ssy-node-koa

// 获取路径/文件名/扩展名

const p = path.resolve('src/index.js');

console.log(p) // e:\ssy-node\ssy-node-koa\src\index.js

console.log(path.dirname(p)) // e:\ssy-node\ssy-node-koa\src

console.log(path.basename(p)); // index.js

console.log(path.basename(p,'.js')); // index

console.log(path.extname(p)); // .js

// 判断

console.log(path.isAbsolute(p)) // true

// path.resolve

// 从右向左执行，直到绝对路径为止；如果路径执行完成还未找到绝对路径；则自动添加当前目录路径，注意：会执行 ..

console.log(path.resolve('dist')) // e:\ssy-node\ssy-node-koa\dist

console.log(path.resolve(__dirname, 'dist')) // e:\ssy-node\ssy-node-koa\src\dist

// path.join

console.log(path.join('./src/dist', '../dist/index')) // src\dist\index

// path.relative

const path1 = path.resolve('dist');

const path2 = path.resolve(__dirname, 'dist');

const relativePath = path.relative(path1,path2);

console.log(relativePath); // ../src/dist

// path.parse

console.log(path.parse(p));

// e:\ssy-node\ssy-node-koa\src\index.js

// {

// root: 'e:\\',

// dir: 'e:\\ssy-node\\ssy-node-koa\\src',

// base: 'index.js',

// ext: '.js',

// name: 'index'

// }

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