将自动完成添加到搜索输入

Question

我有搜索输入以及下拉存储为li元素。如何向搜索标签添加自动完成功能，从li标签获取数据，并在搜索输入中显示相应的结果。

自动完成程序应从ul li标签中提取内容并执行操作。可以通过li搜索输入标签完成吗？

js prettyprint-override">$(".search-input").on("click", function(e) {
  $(".results").css({
    "display": "block"
  });
})


$(".search .search-list").on("click", function(e) {
  console.log('clicked')
   $('.search-input').val($(this).first().text())
})

.search {
  position: relative;
  margin: 0 auto;
  /* width: 300px; */
}

.search input {
  height: 30px;
  width: 100%;
  padding: 0 12px 0 25px;
  /* background: white url("https://cssdeck.com/uploads/media/items/5/5JuDgOa.png") 8px 6px no-repeat; */
  border-width: 1px;
  border-style: solid;
  border-color: #a8acbc #babdcc #c0c3d2;
  border-radius: 13px;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  -ms-box-sizing: border-box;
  -o-box-sizing: border-box;
  box-sizing: border-box;
  -webkit-box-shadow: inset 0 1px #e5e7ed, 0 1px 0 #fcfcfc;
  -moz-box-shadow: inset 0 1px #e5e7ed, 0 1px 0 #fcfcfc;
  -ms-box-shadow: inset 0 1px #e5e7ed, 0 1px 0 #fcfcfc;
  -o-box-shadow: inset 0 1px #e5e7ed, 0 1px 0 #fcfcfc;
  box-shadow: inset 0 1px #e5e7ed, 0 1px 0 #fcfcfc;
}

.search input:focus {
  outline: none;
  border-color: #66b1ee;
  -webkit-box-shadow: 0 0 2px rgba(85, 168, 236, 0.9);
  -moz-box-shadow: 0 0 2px rgba(85, 168, 236, 0.9);
  -ms-box-shadow: 0 0 2px rgba(85, 168, 236, 0.9);
  -o-box-shadow: 0 0 2px rgba(85, 168, 236, 0.9);
  box-shadow: 0 0 2px rgba(85, 168, 236, 0.9);
}

.search input:focus + .results { display: block }

.search .results {
  display: none;
  position: absolute;
  top: 35px;
  left: 0;
  cursor: pointer;
  right: 0;
  z-index: 10;
  padding: 0;
  margin: 0;
  border-width: 1px;
  border-style: solid;
  border-color: #cbcfe2 #c8cee7 #c4c7d7;
  border-radius: 3px;
  background-color: #fdfdfd;
  background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #fdfdfd), color-stop(100%, #eceef4));
  background-image: -webkit-linear-gradient(top, #fdfdfd, #eceef4);
  background-image: -moz-linear-gradient(top, #fdfdfd, #eceef4);
  background-image: -ms-linear-gradient(top, #fdfdfd, #eceef4);
  background-image: -o-linear-gradient(top, #fdfdfd, #eceef4);
  background-image: linear-gradient(top, #fdfdfd, #eceef4);
  -webkit-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  -moz-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  -ms-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  -o-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.search .results li { display: block }

.search .results li:first-child { margin-top: -1px }

.search .results li:first-child:before, .search .results li:first-child:after {
  display: block;
  content: '';
  width: 0;
  height: 0;
  position: absolute;
  left: 50%;
  margin-left: -5px;
  border: 5px outset transparent;
}

.search .results li:first-child:before {
  border-bottom: 5px solid #c4c7d7;
  top: -11px;
}

.search .results li:first-child:after {
  border-bottom: 5px solid #fdfdfd;
  top: -10px;
}

.search .results li:first-child:hover:before, .search .results li:first-child:hover:after { display: none }

.search .results li:last-child { margin-bottom: -1px }

.search .results a {
  display: block;
  position: relative;
  margin: 0 -1px;
  padding: 6px 40px 6px 10px;
  color: #808394;
  font-weight: 500;
  text-shadow: 0 1px #fff;
  border: 1px solid transparent;
  border-radius: 3px;
}

.search .results a span { font-weight: 200 }

.search .results a:before {
  content: '';
  width: 18px;
  height: 18px;
  position: absolute;
  top: 50%;
  right: 10px;
  margin-top: -9px;
  /* background: url("https://cssdeck.com/uploads/media/items/7/7BNkBjd.png") 0 0 no-repeat; */
}

.search .results a:hover {
  text-decoration: none;
  color: #fff;
  text-shadow: 0 -1px rgba(0, 0, 0, 0.3);
  border-color: #2380dd #2179d5 #1a60aa;
  background-color: #338cdf;
  /* background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #59aaf4), color-stop(100%, #338cdf));
  background-image: -webkit-linear-gradient(top, #59aaf4, #338cdf);
  background-image: -moz-linear-gradient(top, #59aaf4, #338cdf);
  background-image: -ms-linear-gradient(top, #59aaf4, #338cdf);
  background-image: -o-linear-gradient(top, #59aaf4, #338cdf);
  background-image: linear-gradient(top, #59aaf4, #338cdf); */
  -webkit-box-shadow: inset 0 1px rgba(255, 255, 255, 0.2), 0 1px rgba(0, 0, 0, 0.08);
  -moz-box-shadow: inset 0 1px rgba(255, 255, 255, 0.2), 0 1px rgba(0, 0, 0, 0.08);
  -ms-box-shadow: inset 0 1px rgba(255, 255, 255, 0.2), 0 1px rgba(0, 0, 0, 0.08);
  -o-box-shadow: inset 0 1px rgba(255, 255, 255, 0.2), 0 1px rgba(0, 0, 0, 0.08);
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.2), 0 1px rgba(0, 0, 0, 0.08);
}

:-moz-placeholder {
  color: #a7aabc;
  font-weight: 200;
}

::-webkit-input-placeholder {
  color: #a7aabc;
  font-weight: 200;
}

.lt-ie9 .search input { line-height: 26px }

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<div class="modal fade" id="search-bar" role="dialog">
  <div class="modal-dialog search-modal">
    <div class="modal-content search-modal">
      <div class="modal-body">
        <section class="main">
          <form class="search">
            <input type="text" class="search-input" name="q" placeholder="Search..." />
            <ul class="results">
              <li class="search-list"><a href="">Search Result #1<br /><span>Description...</span></a></li>
              <li class="search-list"><a href="">Search Result #2<br /><span>Description...</span></a></li>
              <li class="search-list"><a href="">Search Result #3<br /><span>Description...</span></a></li>
              <li class="search-list"><a href="">Search Result #4</a></li>
            </ul>
          </form>
        </section>
      </div>
    </div>
  </div>
</div>

Answer 1

你必须设置

$(".search-input").on("click", function(e) {
  $(".results").css({
    "display": "block"
  });
})


$(".search .search-list").on("click", function(e) {
  console.log('clicked')
   $('.search-input').val($(this).first().text());
   $(".results").css({
    "display": "none"
  });
})

.search {
  position: relative;
  margin: 0 auto;
  /* width: 300px; */
}

.search input {
  height: 30px;
  width: 100%;
  padding: 0 12px 0 25px;
  /* background: white url("https://cssdeck.com/uploads/media/items/5/5JuDgOa.png") 8px 6px no-repeat; */
  border-width: 1px;
  border-style: solid;
  border-color: #a8acbc #babdcc #c0c3d2;
  border-radius: 13px;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  -ms-box-sizing: border-box;
  -o-box-sizing: border-box;
  box-sizing: border-box;
  -webkit-box-shadow: inset 0 1px #e5e7ed, 0 1px 0 #fcfcfc;
  -moz-box-shadow: inset 0 1px #e5e7ed, 0 1px 0 #fcfcfc;
  -ms-box-shadow: inset 0 1px #e5e7ed, 0 1px 0 #fcfcfc;
  -o-box-shadow: inset 0 1px #e5e7ed, 0 1px 0 #fcfcfc;
  box-shadow: inset 0 1px #e5e7ed, 0 1px 0 #fcfcfc;
}

.search input:focus {
  outline: none;
  border-color: #66b1ee;
  -webkit-box-shadow: 0 0 2px rgba(85, 168, 236, 0.9);
  -moz-box-shadow: 0 0 2px rgba(85, 168, 236, 0.9);
  -ms-box-shadow: 0 0 2px rgba(85, 168, 236, 0.9);
  -o-box-shadow: 0 0 2px rgba(85, 168, 236, 0.9);
  box-shadow: 0 0 2px rgba(85, 168, 236, 0.9);
}

.search input:focus + .results { display: block }

.search .results {
  display: none;
  position: absolute;
  top: 35px;
  left: 0;
  cursor: pointer;
  right: 0;
  z-index: 10;
  padding: 0;
  margin: 0;
  border-width: 1px;
  border-style: solid;
  border-color: #cbcfe2 #c8cee7 #c4c7d7;
  border-radius: 3px;
  background-color: #fdfdfd;
  background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #fdfdfd), color-stop(100%, #eceef4));
  background-image: -webkit-linear-gradient(top, #fdfdfd, #eceef4);
  background-image: -moz-linear-gradient(top, #fdfdfd, #eceef4);
  background-image: -ms-linear-gradient(top, #fdfdfd, #eceef4);
  background-image: -o-linear-gradient(top, #fdfdfd, #eceef4);
  background-image: linear-gradient(top, #fdfdfd, #eceef4);
  -webkit-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  -moz-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  -ms-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  -o-box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.search .results li { display: block }

.search .results li:first-child { margin-top: -1px }

.search .results li:first-child:before, .search .results li:first-child:after {
  display: block;
  content: '';
  width: 0;
  height: 0;
  position: absolute;
  left: 50%;
  margin-left: -5px;
  border: 5px outset transparent;
}

.search .results li:first-child:before {
  border-bottom: 5px solid #c4c7d7;
  top: -11px;
}

.search .results li:first-child:after {
  border-bottom: 5px solid #fdfdfd;
  top: -10px;
}

.search .results li:first-child:hover:before, .search .results li:first-child:hover:after {  }

.search .results li:last-child { margin-bottom: -1px }

.search .results a {
  display: block;
  position: relative;
  margin: 0 -1px;
  padding: 6px 40px 6px 10px;
  color: #808394;
  font-weight: 500;
  text-shadow: 0 1px #fff;
  border: 1px solid transparent;
  border-radius: 3px;
}

.search .results a span { font-weight: 200 }

.search .results a:before {
  content: '';
  width: 18px;
  height: 18px;
  position: absolute;
  top: 50%;
  right: 10px;
  margin-top: -9px;
  /* background: url("https://cssdeck.com/uploads/media/items/7/7BNkBjd.png") 0 0 no-repeat; */
}

.search .results a:hover {
  text-decoration: none;
  color: #fff;
  text-shadow: 0 -1px rgba(0, 0, 0, 0.3);
  border-color: #2380dd #2179d5 #1a60aa;
  background-color: #338cdf;
  /* background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #59aaf4), color-stop(100%, #338cdf));
  background-image: -webkit-linear-gradient(top, #59aaf4, #338cdf);
  background-image: -moz-linear-gradient(top, #59aaf4, #338cdf);
  background-image: -ms-linear-gradient(top, #59aaf4, #338cdf);
  background-image: -o-linear-gradient(top, #59aaf4, #338cdf);
  background-image: linear-gradient(top, #59aaf4, #338cdf); */
  -webkit-box-shadow: inset 0 1px rgba(255, 255, 255, 0.2), 0 1px rgba(0, 0, 0, 0.08);
  -moz-box-shadow: inset 0 1px rgba(255, 255, 255, 0.2), 0 1px rgba(0, 0, 0, 0.08);
  -ms-box-shadow: inset 0 1px rgba(255, 255, 255, 0.2), 0 1px rgba(0, 0, 0, 0.08);
  -o-box-shadow: inset 0 1px rgba(255, 255, 255, 0.2), 0 1px rgba(0, 0, 0, 0.08);
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.2), 0 1px rgba(0, 0, 0, 0.08);
}

:-moz-placeholder {
  color: #a7aabc;
  font-weight: 200;
}

::-webkit-input-placeholder {
  color: #a7aabc;
  font-weight: 200;
}

.lt-ie9 .search input { line-height: 26px }

html prettyprint-override"><script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<div class="modal fade" id="search-bar" role="dialog">
  <div class="modal-dialog search-modal">
    <div class="modal-content search-modal">
      <div class="modal-body">
        <section class="main">
          <form class="search">
            <input type="text" class="search-input" name="q" placeholder="Search..." />
            <ul class="results">
              <li class="search-list"><a href="#">Search Result #1<br /><span>Description...</span></a></li>
              <li class="search-list"><a href="#">Search Result #2<br /><span>Description...</span></a></li>
              <li class="search-list"><a href="#">Search Result #3<br /><span>Description...</span></a></li>
              <li class="search-list"><a href="#">Search Result #4</a></li>
            </ul>
          </form>
        </section>
      </div>
    </div>
  </div>
</div>