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18 lines
485 B
TypeScript
18 lines
485 B
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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export function getDOMStringList(arr: string[]): DOMStringList {
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Object.defineProperties(arr, {
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contains: {
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value(searchElement: string): boolean {
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return arr.includes(searchElement);
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},
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enumerable: true,
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},
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item: {
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value(idx: number): string | null {
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return idx in arr ? arr[idx] : null;
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},
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},
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});
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return arr as string[] & DOMStringList;
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}
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