如何在移动设备上将现有按钮固定到底部？ （引导）

Question

我在列的容器中有一个现有按钮。我需要将其从桌面上的正常位置更改为固定到移动设备上的屏幕底部。

这是一个例子

#free-offer-button {
  background-color: #d97b6c;
  border-color: #d97b6c;
  border-radius: 0px;
  color: #ffffff;
  font-size: 18px;
  font-weight: bold;
  padding: 9px 23px;
}

<Col xs={{ span: 12, order: 2 }} md={{ span: 6, order: 1 }}>
<h3 id='first-container-header'>Treat your pet (and you).</h3>
<h3>It's on us!</h3>
<br></br>

<p>Treat your pet to a healthy treat for <strong>free</strong> to kick off your Public Goods trial membership.</p>
<p><strong>See what it's like to be a Public Goods member.</strong></p>
<ul>
  <li>Included in your bundle is free 2-week membership that gives you unlimited access to our entire collection of sustainable essentials.</li>
  <li>Take a load off. We make it easy for your to make better choices. Always included: eco-friendly products you can trust.</li>
</ul>

<div className='d-grid mt-5'>
  <Button variant="btn-block" id='free-offer-button'> Claim your free offer</Button>
</div>

</Col>

Answer 1

使用媒体查询@media希望您的问题会得到解决。

并且还使用引导类名称class="position-fixed bottom-0"

#free-offer-button{
background-color:#d97b6c;
border-color: #d97b6c;
border-radius:0px;
color:#ffffff;
font-size:18px;
font-weight:bold;
padding:9px 23px;
}
@media only screen and (max-width: 575px) {
  #free-offer-button {
    position:fixed;
    bottom:0;
    font-size:14px;
    width:100%;
    font-weight:normal;
    border:1px solid #d97b6c;
  }
}

<Col xs={{ span: 12, order: 2 }} md={{ span: 6, order: 1 }}>
                        <h3 id='first-container-header'>Treat your pet (and you).</h3>
                        <h3>It's on us!</h3>
                        <br></br>

                        <p>Treat your pet to a healthy treat  for <strong>free</strong> to kick off your Public Goods trial membership.</p>
                        <p><strong>See what it's like to be a Public Goods member.</strong></p>
                        <ul>
                            <li>Included in your bundle is free 2-week membership that gives you unlimited access to our entire collection of sustainable essentials.</li>
                            <li>Take a load off. We make it easy for your to make better choices. Always included: eco-friendly products you can trust.</li>
                        </ul>

                    <div className='d-grid mt-5'>
                        <Button variant="btn-block" id='free-offer-button'> Claim your free offer</Button>
                    </div>

                </Col>

Answer 2

使用位置：

<div className='d-grid mt-5 col-12' style="position:'relative'">
<Button variant="btn-block" id='free-offer-button' style="position:'fixed';bottom:0;"> Claim your free offer</Button>
</div>