To memo the NodeJS's path library(include syntax and functions).

nodejsPath.js

// Nodejs's Path built-in library.
let path = require('path');

// Get dir's path.
let dirPath = path.dirname('/xx/yy/zz.js');
console.log('dirPath', dirPath);

// Get join's path.
let joinPath = path.join(__dirname, '/xx');
console.log('joinPath', joinPath);

// Get basename's path.
let basenamePath = path.basename('/xx/yy/zz.js');
console.log('basenamePath', basenamePath);

// Get extname's path.
let extnamePath = path.extname('/xx/yy/zz.js');
console.log('extnamePath', extnamePath);

// Get path's object.
let objPath = path.parse('/xx/yy/zz.js');
console.log('objPath', objPath);
// objPath { root: '/', dir: '/xx/yy', base: 'zz.js', ext: '.js', name: 'zz' }