请问，想要忽略大小写，请问应该如何优化此代码呢？-灵析社区

function searchKeys(searchParam: string): string[] { const loweredSearchParam = searchParam.toLowerCase(); const keys: string[] = Object.keys(searchData).filter((key: string) => { const keywords: string[] = searchData[key]; return keywords.some((keyword: string) => keyword.toLowerCase().includes(loweredSearchParam)); }); return keys; }