如何让Javascript中的小写和大写字符搜索相同的单词

function searchSameWord(text, word) {
  const regex = new RegExp(`\\b${word}\\b`, 'gi');
  const matches = text.match(regex);
  return matches;
}

const text = 'JavaScript is a popular programming language. javascript can be used for both frontend and backend development.';
const word = 'javascript';
const result = searchSameWord(text, word);
console.log(result); // Output: ["JavaScript", "javascript"]

function searchSameWord(text, word) {
  const lowerText = text.toLowerCase();
  const lowerWord = word.toLowerCase();
  const words = lowerText.split(' ');
  const matches = [];

  for (const w of words) {
    if (w === lowerWord) {
      matches.push(w);
    }
  }

  return matches;
}

const text = 'JavaScript is a popular programming language. javascript can be used for both frontend and backend development.';
const word = 'javascript';
const result = searchSameWord(text, word);
console.log(result); // Output: ["javascript", "javascript"]