html - 带有按钮的垂直和水平居中数据列表框

Question

试图通过将它对齐到中心(垂直和水平)来设置我的数据列表的样式，但我只能水平居中而不是垂直。

有没有办法增加数据列表框的宽度并做一些样式。请帮助..

$('#btn').click(function() { // The `$` reference here is a jQuery syntax. So we are loading jquery right before this script tag
        var textval = $('#textcat').val();
        window.location = "1stlink.php?variable=" + encodeURIComponent(textval);
      });

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
 
    <div class="container">
      <div class="row">
        <div class="col-md-6 col-md-offset-3">
    <div class="text-center">
    <input list="category" name="category" id="textcat" placeholder="Enter your area..">
    <datalist id="category">
      <option id="www.google.com" value="fruits" />
      <option id="www.fb.com" value="animals" />
      <option id="www.ymail.com" value="vechiles" />
      <option id="www.msn.com" value="ornaments" />
    </datalist>
    <input id="btn" type="button" value="submit">
  
    </div>
    </div>
    </div>

Answer 1

在“输入”元素中，您可以根据自己的喜好轻松调整元素宽度。

请参阅此页面以获取更多信息 https://www.w3schools.com/css/css_form.asp

$('#btn').click(function() { // The `$` reference here is a jQuery syntax. So we are loading jquery right before this script tag
  var textval = $('#textcat').val();
  window.location = "1stlink.php?variable=" + encodeURIComponent(textval);
});

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
<div class="container">
  <div class="row" style="width: 100%; padding-top: 25%">
    <div class="col-md-6 col-md-offset-3">
      <div class="text-center">
        <input style="width: 100%" list="category" name="category" id="textcat" placeholder="Enter your area..">
        <datalist id="category">
          <option id="www.google.com" value="fruits" />
          <option id="www.fb.com" value="animals" />
          <option id="www.ymail.com" value="vechiles" />
          <option id="www.msn.com" value="ornaments" />
        </datalist>
        <input id="btn" type="button" value="submit">
      </div>
    </div>
  </div>