输入为空时,搜索结果元素未隐藏

我正在尝试创建一个搜索/过滤功能,在这个功能中,只要搜索框中没有输入任何内容,选项列表就会被隐藏。我以前曾设法将其隐藏,但由于某种原因,在输入一个值并将其删除后,列表中的所有内容都会再次显示。

搜索还应该能够搜索出无序的单词,并且不能为了实现这一目标而牺牲这些单词。

代码复制如下。谢谢

CSS

#input {
  width: 85%; /* Full-width */
  padding: 12px 20px 12px 15px; /* Add some padding */
  border: 1px solid #ddd; /* Add a grey border */
  margin-bottom: 12px; /* Add some space below the input */
  border-radius: 15px;
  font-size: 16px;
  font-family: Franklin Gothic Book;
}

#trpUL {
  /* Remove default list styling */
  list-style-type: none;
  padding: 0;
  margin: 0;
  position: absolute;
  z-index: 1;
  width: 35%;
}

#trpUL li a {
  border: 1px solid #ddd; /* Add a border to all links */
  margin-top: -1px; /* Prevent double borders */
  background-color: #f6f6f6; /* Grey background color */
  padding: 12px; /* Add some padding */
  text-decoration: none; /* Remove default text underline */
  font-size: 13px; /* Increase the font-size */
  font-weight: bold;
  color: #1d4f91; /* Add a black text color */
  display: block; /* Make it into a block element to fill the whole list */
  font-family: Franklin Gothic Book;
}

#trpUL li {
  display:none;
}

#trpUL li a:hover:not(.header) {
  background-color: #eee; /* Add a hover effect to all links, except for headers */
}

javascript

function myFunction() {
  var filter = $('input').val().toUpperCase().split(' '); 
  var li = $('li');
  var a = $('a');
  var ul;
  var txtValue;
  ul = document.getElementById("trpUL");
  var match
  
  
  for (var i = 0; i < li.length; i++) {
    a = li[i].getElementsByTagName("a")[0];
    txtValue = (a.textContent || a.innerText).toUpperCase();
    
    match = true;
   

    for (var f = 0; f < filter.length && match; f++) {
        match = txtValue.includes(filter[f]);
    }

    li[i].style.display = match ? 'block' : 'none';

    
  }
}

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" id="input" onkeyup="myFunction()" placeholder="Search resources..." value="">

<ul id="trpUL">
  <li><a href="/" target="_blank">Alabama HomeCare - New Hire Curriculum</a></li>
  <li><a href="/" target="_blank">Arizona HomeCare - New Hire Curriculum</a></li>

  <li><a href="/" target="_blank">California HomeCare Leadership - New Hire Curriculum</a></li>
  <li><a href="/" target="_blank">Georgia HomeCare - New Hire Curriculum</a></li>

  <li><a href="/" target="_blank">Georgia HomeCare IDD - New Hire Curriculum</a></li>
  <li><a href="/" target="_blank">HomeCare Leadership - New Hire Curriculum</a></li>
  <li><a href="/" target="_blank">Idaho HomeCare - New Hire Curriculum</a></li>
  <li><a href="/" target="_blank">Illinois Licensed HomeCare - New Hire Curriculum</a></li>
  <li><a href="/" target="_blank">Illinois Non-Licensed HomeCare</a></li>
  <li><a href="/" target="_blank">Montana HomeCare - New Hire Curriculum</a></li>
</ul>