// below will merge objA + objB
const obj = Object.assign( {}, objA, objB )
const result = cssobj(obj) // one <style> have them all

cssobj(objA, {intros: [objB, objC]})
// same as above, `intros` just a sugar

const objA = { '.nav': {color: 'red'} }
const resultA = cssobj(objA, {local: true})
// resultA.space = _ahmk9c4_
const objB = { '.item': {color: 'blue'} }
const resultB = cssobj(objB, {local: resultA})
// this will make resultB have same space as resultA (_ahmk9c4_)
// above code is same as local:{space: resultA.space, localNames: resultA.localNames}
// result:
// .nav_ahmk9c4_ { color: red; }
// .item_ahmk9c4_ { color: blue; }
// you can merge more...