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Update to remove warning #52

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Update to remove warning #52

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11 changes: 8 additions & 3 deletions src/_implementation/feature_detect.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -18,9 +18,14 @@ let hasNative: boolean|undefined;
export function hasNativeDeclarativeShadowRoots(): boolean {
if (hasNative === undefined) {
const html = `<div><template shadowrootmode="open"></template></div>`;
const fragment = (new DOMParser() as DOMParser).parseFromString(html, 'text/html', {
includeShadowRoots: true
});
let fragment: Document;
if ('parseHTMLUnsafe' in Document) {
fragment = (Document as { parseHTMLUnsafe: (html: string) => Document }).parseHTMLUnsafe(html);
} else {
fragment = (new DOMParser() as DOMParser).parseFromString(html, 'text/html', {
includeShadowRoots: true
});
}
hasNative = !!fragment.querySelector('div')?.shadowRoot;
}
return hasNative;
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