css classnames prefix factory

prefix-factory.js

function prefixFactory(prefix) {
  return function prefixer(string) {
    return string.split(' ')
        .map( s => prefix + s)
        .join(' ');
  };
}

export default prefixFactory;

z-example.js

import prefixFactory from 'prefix-factory';

var prefixer = prefixFactory('my-class-');
var className = 'one two three';
var prefixedClassName = prefixer(className);  
console.log(prefixedClassName); //    "my-class-one my-class-two my-class-three"