在javascript中选择一个选项并搜索段落

<select id="mySelect">
  <option value="option1">选项1</option>
  <option value="option2">选项2</option>
  <option value="option3">选项3</option>
</select>

<script>
  var selectElement = document.getElementById("mySelect");
  var selectedOption = selectElement.options[selectElement.selectedIndex].value;
</script>

<p>这是第一个段落。</p>
<p>这是第二个段落。</p>
<p>这是第三个段落。</p>

<script>
  var paragraphs = document.getElementsByTagName("p");
  var searchText = "选项1";

  for (var i = 0; i < paragraphs.length; i++) {
    var paragraphText = paragraphs[i].textContent;
    if (paragraphText.indexOf(searchText) !== -1) {
      // 找到包含搜索文本的段落
      console.log("找到匹配的段落：" + paragraphText);
    }
  }
</script>