在字符串中搜索精确的单词，返回匹配的数量

function searchExactWordCount(str, targetWord) {
  // 将字符串拆分成单词数组
  const words = str.split(/\W+/);

  let count = 0;
  for (let i = 0; i < words.length; i++) {
    // 对每个单词进行精确匹配搜索
    if (words[i] === targetWord) {
      count++;
    }
  }

  return count;
}

// 示例用法
const sentence = "This is a sample sentence. It contains sample words.";
const target = "sample";
const result = searchExactWordCount(sentence, target);
console.log(result); // 输出：2