Easy way to put conditions into class names

classNames.js

/**
 * Filter a list of expressions to final string.
 *
 * @param args
 * @returns {string}
 */
const classNames = (...args) =>
  args
    .reduce((accumulator, itm) => {
      if (itm) {
        accumulator.push(`${itm}`.trim());
        return accumulator;
      }
      return accumulator;
    }, [])
    .join(' ');

export default classNames;

const isSelected = true;
const isDisabled = false;
classNames('option', isSelected && 'selected', isDisabled && 'disabled') // will return 'option selected'