VLEX/BPM-UI/node_modules/ngx-bootstrap/positioning/esm2015/utils/getScrollParent.js

/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */
/**
 * Returns the scrolling parent of the given element
 */
import { getStyleComputedProperty } from './getStyleComputedProperty';
import { getParentNode } from './getParentNode';
/**
 * @param {?} element
 * @return {?}
 */
export function getScrollParent(element) {
    // Return body, `getScroll` will take care to get the correct `scrollTop` from it
    if (!element) {
        return document.body;
    }
    switch (element.nodeName) {
        case 'HTML':
        case 'BODY':
            return element.ownerDocument.body;
        case '#document':
            return element.body;
        default:
    }
    // Firefox want us to check `-x` and `-y` variations as well
    const { overflow, overflowX, overflowY } = getStyleComputedProperty(element);
    if (/(auto|scroll|overlay)/.test(String(overflow) + String(overflowY) + String(overflowX))) {
        return element;
    }
    return getScrollParent(getParentNode(element));
}
//# sourceMappingURL=data:application/json;base64,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