const yargs = require('yargs'); const argv = yargs .option('slow', { alias: 's', description: 'delay each request this many milliseconds for testing', type: 'number' }) .option('image-path', { alias: 'i', description: 'base path to store images', type: 'string', default: './images' }) .option('port', { alias: 'p', description: 'http server port', type: 'number', default: 3000 }) .help().alias('help', 'h') .argv; console.log(argv);