如何实现卡片搜索无结果时准确显示“未找到卡片”提示

function myFunction() {
  var input, filter, cards, cardContainer, noContent, title, i, cardExist;

  input = document.getElementById("myFilter");
  noContent = document.getElementById("no-content");

  filter = input.value.toUpperCase();
  cardContainer = document.getElementById("myItems");
  cards = cardContainer.getElementsByClassName("blog-card");

  noContent.style.display = "none"; // 每次搜索开始时隐藏提示

  for (i = 0; i < cards.length; i++) {
    title = cards[i].querySelector(".card-title");
    if (title.innerText.toUpperCase().indexOf(filter) > -1) {
      cards[i].style.display = "block";
    } else {
      cards[i].style.display = "none";
      // 错误：在这里直接显示 noContent 可能导致误判
      noContent.style.display = "flex"; 
    }
  }
}

<div class="input-container">
  <input type="text" id="myFilter" class="search-imput" onkeyup="myFunction()" placeholder="Search for names..">
</div>

<div class="card-container" id="myItems">
  <!-- 多个 .blog-card 元素在此处 -->
  <div class="blog-card">
    <div class="blog-card-body">
      <h1 class="card-title">Auto Repair</h1>
    </div>
    <!-- ... 其他卡片内容 ... -->
  </div>
  <div class="blog-card">
    <div class="blog-card-body">
      <h1 class="card-title">Dentist</h1>
    </div>
    <!-- ... 其他卡片内容 ... -->
  </div>
  <!-- ... 更多卡片 ... -->
</div>

<div class="no-content" id="no-content" style="display: none;">
  <h1>there are no more blog post with this term</h1>
</div>

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@500&family=Open+Sans:wght@700&display=swap');

/* 搜索输入框样式 */
.input-container {
  display: flex;
  justify-content: center;
  width: 100%;
}

.input-container .search-imput {
  margin: 20px;
  width: 50%;
  height: 40px;
  border-radius: 30px;
  border: 2px solid #6F77E9;
}

::placeholder {
  color: #161663;
  font-weight: bold;
  text-align: center;
  font-size: 1em;
}

/* 卡片容器和卡片样式 */
.card-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  flex-direction: row;
  margin: 50px;
  /* width: 100%px;  此处应为 width: 100%; 或删除 px */
}

.blog-card {
  width: 490px;
  height: 470px;
  margin: 15px;
  border-radius: 20px;
  box-shadow: 0px 0px 4px 0px rgba(22, 22, 99, 0.30);
}

/* ... 其他卡片内部元素样式 ... */

/* 无内容提示样式 */
.no-content {
  width: 100vw;
  height: 50vh;
  display: flex; /* 默认设置为 flex，通过 JS 控制显示/隐藏 */
  justify-content: center;
  align-items: center;
}

.no-content h1 {
  font-size: 20px;
  padding: 0px 20px;
  font-family: 'Montserrat', sans-serif;
  color: #161663;
}

function myFunction() {
  const input = document.getElementById("myFilter");
  const noContent = document.getElementById("no-content");
  const filter = input.value.toUpperCase();
  const cardContainer = document.getElementById("myItems");
  // 将 HTMLCollection 转换为数组，以便使用 forEach 和 filter 方法
  const cards = Array.from(cardContainer.getElementsByClassName("blog-card"));

  // 步骤 1: 首先隐藏所有卡片，重置显示状态
  cards.forEach(card => card.style.display = "none");

  // 步骤 2: 过滤出所有匹配搜索条件的卡片
  const matchingCards = cards.filter(
    card => card.querySelector(".card-title").innerText.toUpperCase().includes(filter)
  );

  // 步骤 3: 显示所有匹配的卡片
  matchingCards.forEach(card => card.style.display = "block");

  // 步骤 4: 根据匹配卡片的数量，决定是否显示“无内容”提示
  noContent.style.display = (matchingCards.length === 0 ? "flex" : "none"); 
}