如何正确导入 CDN，我的代码包含 CSS 和 jQuery CDN 有什么问题？

Question

我想我正确导入了 CSS 和 jQuery，但显示的结果不是我想要的。

<!-- This snippet uses Font Awesome 5 Free as a dependency. You can download it at fontawesome.io! -->
<link ref="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css">
<link ref="stylesheet" href="https://use.fontawesome.com/releases/v5.0.13/css/all.css">


<style>
//all the css from the template, Whosebug says my question is full of codes so I remove it
</style>

<body>
  <section class="pricing py-5">
    <div class="container">
      <div class="row">
        <!-- Free Tier -->
        <div class="col-lg-4">
          <div class="card mb-5 mb-lg-0">
            <div class="card-body">
              <h5 class="card-title text-muted text-uppercase text-center">Free</h5>
              <h6 class="card-price text-center">[=12=]<span class="period">/month</span></h6>
              <hr>
              <ul class="fa-ul">
                <li><span class="fa-li"><i class="fas fa-check"></i></span>Single User</li>
                <li><span class="fa-li"><i class="fas fa-check"></i></span>5GB Storage</li>
                <li><span class="fa-li"><i class="fas fa-check"></i></span>Unlimited Public Projects</li>
                <li><span class="fa-li"><i class="fas fa-check"></i></span>Community Access</li>
                <li class="text-muted"><span class="fa-li"><i class="fas fa-times"></i></span>Unlimited Private Projects</li>
                <li class="text-muted"><span class="fa-li"><i class="fas fa-times"></i></span>Dedicated Phone Support</li>
                <li class="text-muted"><span class="fa-li"><i class="fas fa-times"></i></span>Free Subdomain</li>
                <li class="text-muted"><span class="fa-li"><i class="fas fa-times"></i></span>Monthly Status Reports</li>
              </ul>
              <a href="#" class="btn btn-block btn-primary text-uppercase">Button</a>
            </div>
          </div>
        </div>
  </section>

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script type="text/javascript" src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.bundle.min.js"></script>
</body>

我从以下位置获取模板：template

jsfiddle: jsfiddle

任何人都可以指出我的代码中的问题所在，将不胜感激。

结果应该是这样的

但我明白了

Answer 1

这是您问题的解决方案，只需将 "ref" 更改为 "rel" 即可。一切都是正确的，只是因为您的外部样式表因 "ref" 而无法加载。要加载任何外部 css 文件，请使用 "rel" 而不是 "ref"。我附上了一段代码供您参考。我希望，它能解决你的问题。

<!-- This snippet uses Font Awesome 5 Free as a dependency. You can download it at fontawesome.io! -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css">
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.13/css/all.css">


<style>
section.pricing {
  background: #9CECFB;
  /* fallback for old browsers */
  background: -webkit-linear-gradient(to right, #0052D4, #65C7F7, #9CECFB);
  /* Chrome 10-25, Safari 5.1-6 */
  background: linear-gradient(to right, #0052D4, #65C7F7, #9CECFB);
  /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}

.pricing .card {
  border: none;
  border-radius: 1rem;
  transition: all 0.2s;
  box-shadow: 0 0.5rem 1rem 0 rgba(0, 0, 0, 0.1);
}

.pricing hr {
  margin: 1.5rem 0;
}

.pricing .card-title {
  margin: 0.5rem 0;
  font-size: 0.9rem;
  letter-spacing: .1rem;
  font-weight: bold;
}

.pricing .card-price {
  font-size: 3rem;
  margin: 0;
}

.pricing .card-price .period {
  font-size: 0.8rem;
}

.pricing ul li {
  margin-bottom: 1rem;
}

.pricing .text-muted {
  opacity: 0.7;
}

.pricing .btn {
  font-size: 80%;
  border-radius: 5rem;
  letter-spacing: .1rem;
  font-weight: bold;
  padding: 1rem;
  opacity: 0.7;
  transition: all 0.2s;
}

/* Hover Effects on Card */

@media (min-width: 992px) {
  .pricing .card:hover {
    margin-top: -.25rem;
    margin-bottom: .25rem;
    box-shadow: 0 0.5rem 1rem 0 rgba(0, 0, 0, 0.3);
  }
  .pricing .card:hover .btn {
    opacity: 1;
  }
}

</style>

<body>
  <!-- This snippet uses Font Awesome 5 Free as a dependency. You can download it at fontawesome.io! -->

<section class="pricing py-5">
    <div class="container">
      <div class="row">
        <!-- Free Tier -->
        <div class="col-lg-4">
          <div class="card mb-5 mb-lg-0">
            <div class="card-body">
              <h5 class="card-title text-muted text-uppercase text-center">Free</h5>
              <h6 class="card-price text-center">[=10=]<span class="period">/month</span></h6>
              <hr>
              <ul class="fa-ul">
                <li><span class="fa-li"><i class="fas fa-check"></i></span>Single User</li>
                <li><span class="fa-li"><i class="fas fa-check"></i></span>5GB Storage</li>
                <li><span class="fa-li"><i class="fas fa-check"></i></span>Unlimited Public Projects</li>
                <li><span class="fa-li"><i class="fas fa-check"></i></span>Community Access</li>
                <li class="text-muted"><span class="fa-li"><i class="fas fa-times"></i></span>Unlimited Private Projects</li>
                <li class="text-muted"><span class="fa-li"><i class="fas fa-times"></i></span>Dedicated Phone Support</li>
                <li class="text-muted"><span class="fa-li"><i class="fas fa-times"></i></span>Free Subdomain</li>
                <li class="text-muted"><span class="fa-li"><i class="fas fa-times"></i></span>Monthly Status Reports</li>
              </ul>
              <a href="#" class="btn btn-block btn-primary text-uppercase">Button</a>
            </div>
          </div>
        </div>
        <!-- Plus Tier -->
        <div class="col-lg-4">
          <div class="card mb-5 mb-lg-0">
            <div class="card-body">
              <h5 class="card-title text-muted text-uppercase text-center">Plus</h5>
              <h6 class="card-price text-center"><span class="period">/month</span></h6>
              <hr>
              <ul class="fa-ul">
                <li><span class="fa-li"><i class="fas fa-check"></i></span><strong>5 Users</strong></li>
                <li><span class="fa-li"><i class="fas fa-check"></i></span>50GB Storage</li>
                <li><span class="fa-li"><i class="fas fa-check"></i></span>Unlimited Public Projects</li>
                <li><span class="fa-li"><i class="fas fa-check"></i></span>Community Access</li>
                <li><span class="fa-li"><i class="fas fa-check"></i></span>Unlimited Private Projects</li>
                <li><span class="fa-li"><i class="fas fa-check"></i></span>Dedicated Phone Support</li>
                <li><span class="fa-li"><i class="fas fa-check"></i></span>Free Subdomain</li>
                <li class="text-muted"><span class="fa-li"><i class="fas fa-times"></i></span>Monthly Status Reports</li>
              </ul>
              <a href="#" class="btn btn-block btn-primary text-uppercase">Button</a>
            </div>
          </div>
        </div>
        <!-- Pro Tier -->
        <div class="col-lg-4">
          <div class="card">
            <div class="card-body">
              <h5 class="card-title text-muted text-uppercase text-center">Pro</h5>
              <h6 class="card-price text-center"><span class="period">/month</span></h6>
              <hr>
              <ul class="fa-ul">
                <li><span class="fa-li"><i class="fas fa-check"></i></span><strong>Unlimited Users</strong></li>
                <li><span class="fa-li"><i class="fas fa-check"></i></span>150GB Storage</li>
                <li><span class="fa-li"><i class="fas fa-check"></i></span>Unlimited Public Projects</li>
                <li><span class="fa-li"><i class="fas fa-check"></i></span>Community Access</li>
                <li><span class="fa-li"><i class="fas fa-check"></i></span>Unlimited Private Projects</li>
                <li><span class="fa-li"><i class="fas fa-check"></i></span>Dedicated Phone Support</li>
                <li><span class="fa-li"><i class="fas fa-check"></i></span><strong>Unlimited</strong> Free Subdomains</li>
                <li><span class="fa-li"><i class="fas fa-check"></i></span>Monthly Status Reports</li>
              </ul>
              <a href="#" class="btn btn-block btn-primary text-uppercase">Button</a>
            </div>
          </div>
        </div>
      </div>
    </div>
  </section>
  

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script type="text/javascript" src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.bundle.min.js"></script>
</body>

如何正确导入 CDN，我的代码包含 CSS 和 jQuery CDN 有什么问题？

How to import CDN correctly, what's wrong with my code with including CSS and jQuery CDN?

html

javascript

css

jquery

cdn