33 lines
867 B
JavaScript
33 lines
867 B
JavaScript
/**
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* Copyright (c) 2013-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule findAncestorOffsetKey
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* @format
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*
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*/
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'use strict';
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var getSelectionOffsetKeyForNode = require('./getSelectionOffsetKeyForNode');
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/**
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* Get the key from the node's nearest offset-aware ancestor.
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*/
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function findAncestorOffsetKey(node) {
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var searchNode = node;
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while (searchNode && searchNode !== document.documentElement) {
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var key = getSelectionOffsetKeyForNode(searchNode);
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if (key != null) {
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return key;
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}
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searchNode = searchNode.parentNode;
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}
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return null;
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}
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module.exports = findAncestorOffsetKey; |