| 1 | /*
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| 2 | * Copyright 2020 Adobe. All rights reserved.
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| 3 | * This file is licensed to you under the Apache License, Version 2.0 (the "License");
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| 4 | * you may not use this file except in compliance with the License. You may obtain a copy
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| 5 | * of the License at http://www.apache.org/licenses/LICENSE-2.0
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| 6 | *
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| 7 | * Unless required by applicable law or agreed to in writing, software distributed under
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| 8 | * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
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| 9 | * OF ANY KIND, either express or implied. See the License for the specific language
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| 10 | * governing permissions and limitations under the License.
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| 11 | */
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| 12 |
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| 13 | import {isScrollable} from './isScrollable';
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| 14 |
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| 15 | export function getScrollParent(node: Element, checkForOverflow?: boolean): Element {
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| 16 | let scrollableNode: Element | null = node;
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| 17 | if (isScrollable(scrollableNode, checkForOverflow)) {
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| 18 | scrollableNode = scrollableNode.parentElement;
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| 19 | }
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| 20 |
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| 21 | while (scrollableNode && !isScrollable(scrollableNode, checkForOverflow)) {
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| 22 | scrollableNode = scrollableNode.parentElement;
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| 23 | }
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| 24 |
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| 25 | return scrollableNode || document.scrollingElement || document.documentElement;
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| 26 | }
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| 27 |
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