What is the best method to vertically center a container in bootstrap 4 at a specified height?

I'm trying to center a container in Bootstrap 4. I have an element with a width of 300px.

.guide-background{
    background: url("https://www.webascender.com/wp-content/uploads/executive-guide-1.jpg");
    background-repeat: no-repeat;
    background-size: cover;
    height: 350px;
    /*filter: brightness(50%);*/
}
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet"/>
 <section id="guide" class="guide-background">
       
       <!-- I want to center this container with id #center_it -->
       
       <div class="container border border-danger" id="center_it">
           <div class="row">
               <div class="col align-self-center">
                   <h2 class="text-center"> <a href="" class="">Center Me</a></h2>
               </div>
           </div>
       </div>
       
   </section>

After putting a container inside it, how can I center the container within it? I attempted to use the grid system, but was unsuccessful. I really need help with this.

Answer №1

If you're looking to center content on a webpage, consider using the flex display property. Bootstrap has already incorporated this feature, which you can explore further at this link.

.guide-background {
  background: url("https://www.webascender.com/wp-content/uploads/executive-guide-1.jpg");
  background-repeat: no-repeat;
  background-size: cover;
  height: 350px;
  /*filter: brightness(50%);*/
}
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet" />
<section id="guide" class="guide-background  d-flex align-items-center flex-colum">

  <!-- I want to center this container with id #center_it -->

  <div class="container border border-danger" id="center_it">
    <div class="row n">
      <div class="col  align-self-center ">
        <h2 class="text-center"> <a href="" class="">Center Me</a></h2>
      </div>
    </div>
  </div>

</section>

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