@kiwicom/orbit-components/es/Popover/helpers/getScrollableParent.js

Orbit-components is a React component library which provides developers with the easiest possible way of building Kiwi.com’s products.

const findStyle = (node, prop) => {
  if (node instanceof HTMLElement) {
    return getComputedStyle(node).getPropertyValue(prop);
  }

  return "";
};

const isScrollable = node => /(auto|scroll)/.test(findStyle(node, "overflow") + findStyle(node, "overflow-y") + findStyle(node, "overflow-x")); // getScrollableParent recursively checking for CSS styles which would indicate that element is scrollable.
// Element can be scrollable when it's parent has overflow auto or scroll set.


const getScrollableParent = node => {
  if (!node || node === document.body) {
    return document.body;
  }

  if (isScrollable(node)) {
    return node;
  }

  if (node && node.parentNode) {
    return getScrollableParent(node.parentNode);
  }

  return null;
};

export default getScrollableParent;