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import getStyleComputedProperty from './getStyleComputedProperty';
import isIE from './isIE';
/**
* Returns the offset parent of the given element
* @method
* @memberof Popper.Utils
* @argument {Element} element
* @returns {Element} offset parent
*/
export default function getOffsetParent(element) {
if (!element) {
return document.documentElement;
}
const noOffsetParent = isIE(10) ? document.body : null;
// NOTE: 1 DOM access here
let offsetParent = element.offsetParent || null;
// Skip hidden elements which don't have an offsetParent
while (offsetParent === noOffsetParent && element.nextElementSibling) {
offsetParent = (element = element.nextElementSibling).offsetParent;
}
const nodeName = offsetParent && offsetParent.nodeName;
if (!nodeName || nodeName === 'BODY' || nodeName === 'HTML') {
return element ? element.ownerDocument.documentElement : document.documentElement;
}
// .offsetParent will return the closest TH, TD or TABLE in case
// no offsetParent is present, I hate this job...
if (
['TH', 'TD', 'TABLE'].indexOf(offsetParent.nodeName) !== -1 &&
getStyleComputedProperty(offsetParent, 'position') === 'static'
) {
return getOffsetParent(offsetParent);
}
return offsetParent;
}