js 忽略大小写

let str1 = "Hello";
let str2 = "hello";

if (str1.toLowerCase() === str2.toLowerCase()) {
  console.log("字符串相等（忽略大小写）");
} else {
  console.log("字符串不相等");
}

let text = "HeLLo World";
let regex = /hello/i;
if (regex.test(text)) {
  console.log("匹配成功");
} else {
  console.log("匹配失败");
}

let arr = ["Apple", "Banana", "Cherry"];
let searchValue = "apple";

let found = arr.some(item => item.toLowerCase() === searchValue.toLowerCase());

if (found) {
  console.log("找到匹配项");
} else {
  console.log("未找到匹配项");
}