dynamicClasses is a function that reads an object and return truthy keys as string

dynamicClasses.js

import { flattenObj } from '#JS/flatten'

const dynamicClasses = (obj) => {
  if (obj && obj instanceof Object) {
    const flatten = flattenObj(obj)
    return Object.keys(flatten)
      .filter(el => flatten[el])
      .join(' ')
  }
  return ''
}