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28 lines
690 B
28 lines
690 B
3 years ago
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"use strict";
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const NODE_TYPE = require("../node-type");
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const { getRoot, retarget } = require("../helpers/shadow-dom");
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class DocumentOrShadowRootImpl {
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get activeElement() {
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let candidate = this._ownerDocument._lastFocusedElement || this._ownerDocument.body;
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if (!candidate) {
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return null;
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}
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candidate = retarget(candidate, this);
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if (getRoot(candidate) !== this) {
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return null;
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}
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if (candidate.nodeType !== NODE_TYPE.DOCUMENT_NODE) {
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return candidate;
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}
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if (candidate.body !== null) {
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return candidate.body;
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}
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return candidate.documentElement;
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}
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}
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module.exports = {
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implementation: DocumentOrShadowRootImpl
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};
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