bootstrap-select | 码农工具

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<!DOCTYPE html>
<html>
<head>
    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.12.4/css/bootstrap-select.min.css">
<script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.js"></script>
<script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.0/js/bootstrap.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.12.4/js/bootstrap-select.min.js"></script>
</head>
<body>
<select class="selectpicker" multiple>
  <option>Mustard</option>
  <option>Ketchup</option>
  <option>Relish</option>
</select>
</body>
HTML