import commandLineArgs = require('command-line-args'); const optionDefinitions: commandLineArgs.OptionDefinition[] = [ { name: 'something', alias: 's', type: String, defaultValue: '1', multiple: true, lazyMultiple: true, defaultOption: true, group: 'one' } ]; const options = commandLineArgs(optionDefinitions, { argv: [ '--one', '1' ], partial: true, stopAtFirstUnknown: true, camelCase: true }); const unknown = options._unknown; const something = options.something;