const { program } = require('commander'); // This is used as an example in the README for the Quick Start. program.option('--first').option('-s, --separator ').argument(''); program.parse(); const options = program.opts(); const limit = options.first ? 1 : undefined; console.log(program.args[0].split(options.separator, limit)); // Try the following: // node split -s / --fits a/b/c // node split -s / --first a/b/c // node split --separator=, a,b,c