IT博客汇 | 一个模拟html下拉多选框的原生实现.

一个模拟html下拉多选框的原生实现.

asuncool@gmail.com(yihaomen)发表于 2016-11-25 22:40:25

用js, html, css 简单的实现一个HTML 下拉多选框，不试用其他框架的情况下，可以借鉴一下，如果用jqueryUI, BOOTSTRAP, 就没必要参考了。毕竟那些现成的东西更好用。

程序代码

<html>

<head>
   <script src="jquery.min.js" type="text/javascript"></script>
  <style>
    body {
  font: normal 14px/100% "Andale Mono", AndaleMono, monospace;
  color: #fff;
  padding: 50px;
  width: 300px;
  margin: 0 auto;
  background-color: #374954;
}

.dropdown {
  position: absolute;
  top:50%;
  transform: translateY(-50%);
}

a {
  color: #fff;
}

.dropdown dd,
.dropdown dt {
  margin: 0px;
  padding: 0px;
}

.dropdown ul {
  margin: -1px 0 0 0;
}

.dropdown dd {
  position: relative;
}

.dropdown a,
.dropdown a:visited {
  color: #fff;
  text-decoration: none;
  outline: none;
  font-size: 12px;
}

.dropdown dt a {
  background-color: #4F6877;
  display: block;
  padding: 8px 20px 5px 10px;
  min-height: 25px;
  line-height: 24px;
  overflow: hidden;
  border: 0;
  width: 272px;
}

.dropdown dt a span,
.multiSel span {
  cursor: pointer;
  display: inline-block;
  padding: 0 5px 2px 0;
}

.dropdown dd ul {
  background-color: #4F6877;
  border: 0;
  color: #fff;
  display: none;
  left: 0px;
  padding: 2px 15px 2px 5px;
  position: absolute;
  top: 2px;
  width: 240px;
  list-style: none;
  height: auto;
  overflow: auto;
  margin-top:30px;
}

.dropdown span.value {
  display: none;
}

.dropdown dd ul li a {
  padding: 5px;
  display: block;
}

.dropdown dd ul li a:hover {
  background-color: #fff;
}

button {
  background-color: #6BBE92;
  width: 302px;
  border: 0;
  padding: 10px 0;
  margin: 5px 0;
  text-align: center;
  color: #fff;
  font-weight: bold;
}
  </style>


</head>
<body>

<dl class="dropdown">

    <dt>
    <div style="">
      <div class="multiSel" style="width:150px;background:#fff;padding: 8px 20px 5px 10px;height:20px;color:#000;float:left;"></div>
      <div class="mydropdown" style="width:50px;background:#fff;padding: 8px 20px 5px 10px;height:20px;color:#000;float:left;">sss</div>
    </div>
    </dt>

    <dd>
        <div class="mutliSelect">
            <ul>
                <li>
                    <input type="checkbox" value="Apple" />Apple</li>
                <li>
                    <input type="checkbox" value="Blackberry" />Blackberry</li>
                <li>
                    <input type="checkbox" value="HTC" />HTC</li>
                <li>
                    <input type="checkbox" value="Sony Ericson" />Sony Ericson</li>
                <li>
                    <input type="checkbox" value="Motorola" />Motorola</li>
                <li>
                    <input type="checkbox" value="Nokia" />Nokia</li>
            </ul>
        </div>
    </dd>

</dl>

<script>
  $(".dropdown dt .mydropdown").on('click', function() {
      $(".dropdown dd ul").slideToggle('fast');
  });

$(".dropdown dd ul li a").on('click', function() {
  $(".dropdown dd ul").hide();
});

function getSelectedValue(id) {
  return $("#" + id).find("dt a span.value").html();
}

$(document).bind('click', function(e) {
  var $clicked = $(e.target);
  if (!$clicked.parents().hasClass("dropdown")) $(".dropdown dd ul").hide();
});

$('.mutliSelect input[type="checkbox"]').on('click', function() {

  var title = $(this).closest('.mutliSelect').find('input[type="checkbox"]').val(),
    title = $(this).val() + ",";

  if ($(this).is(':checked')) {
    var html = '<span title="' + title + '">' + title + '</span>';
    $('.multiSel').append(html);

  } else {
    $('span[title="' + title + '"]').remove();


  }
});
  </script>
</body>

</html>