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-nodessy-node-koasrc
console.log(__filename) // e:ssy-nodessy-node-koasrcindex.js
console.log(process.cwd()) // e:ssy-nodessy-node-koa


// 获取路径/文件名/扩展名
const p = path.resolve('src/index.js');



console.log(p) // e:ssy-nodessy-node-koasrcindex.js
console.log(path.dirname(p)) // e:ssy-nodessy-node-koasrc
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-nodessy-node-koadist
console.log(path.resolve(__dirname, 'dist')) // e:ssy-nodessy-node-koasrcdist




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



// 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-nodessy-node-koasrcindex.js
// { 
//   root: 'e:\',
//   dir: 'e:\ssy-node\ssy-node-koa\src',
//   base: 'index.js',
//   ext: '.js',
//   name: 'index' 
// }