A simple `calcMargin()`

calcMargin.js

export default function calcMargin(obj = {}) {
  if (Number.isInteger(obj)) {
    return {
      top: obj,
      right: obj,
      bottom: obj,
      left: obj,
    };
  }

  if (typeof obj === 'string') {
    const [top, right = top, bottom = top, left = right] = obj.split(' ');

    return {
      top: Number(top),
      right: Number(right),
      bottom: Number(bottom),
      left: Number(left),
    };
  }
  
  const {top = 0, right = 0, bottom = 0, left = 0} = obj;

  return {
    top,
    right,
    bottom,
    left,
  };
}