www/src/layouts/partials/package-grid.html

<!-- Package Grid -->

<section>

  <!-- Package Grid Header -->
  <hr>
    <div class="container package-grid-header">
      <h3>packages</h3>
    </div>
  <hr>
  <div class="container package-grid">

    <!-- Start Package Grid -->

    <div class="row package-row black-bg g-0">
      <div class="package-grid">
        {{ range $.Site.Data.packages }}
          {{- partial "package-thumbnail.html" .}}
        {{ end }}
      </div>
      
    </div>
  </div>
  <hr>
  <div id="loadMoreSection" class="container small">
    <div id="loadMorePackagesBtn"><i class="icon-enter-arrow"></i> SHOW MORE</div>
  </div>
</section>

<style>
  .container.small {
    padding-top: 1em;
    padding-bottom: 1em;
  }
  .package-grid {
    display: grid;
    grid-template-columns: auto auto;
  }
  #loadMorePackagesBtn {
    cursor: pointer;
    font-size: 2rem;
    font-family: "pp-neue-machina", sans-serif;
    background-color: #1a1a1a;
    color: #fff;
    padding-top: 0.279vw;
    text-decoration: none;
    text-transform: uppercase;
    transition: 0.1s linear;
  }
  #loadMorePackagesBtn .icon-enter-arrow {
    display: inline-block;
    position: relaitve;
    transition: all 0.2s ease-in-out;
  }
  #loadMorePackagesBtn:hover .icon-enter-arrow{
    display: inline-block;
    transform: rotate(-45deg) !important;
  }
  #loadMoreSection.hidden {
    display: none;
  }
  @media only screen and (max-width: 576px) {
    #loadMoreSection {
      display: none;
    }
  }

  @media only screen and (min-width: 576px) {
    .package-grid {
      /* changes to 3 column thumbs */
      grid-template-columns: auto auto auto;
    }
  }

  @media only screen and (min-width: 992px) {
    .package-grid {
      /* changes to 4 column thumbs */
      grid-template-columns: auto auto auto auto;
    }
  }

  .card-thumbnail.hidden {
    height: 0px;
    padding: 0px;
    margin: 0px;
    border: 0px;
    overflow: hidden;
  }
</style>

<script language="javascript" type="text/javascript">
  let limit = 16;
  const packages = document.querySelectorAll('.card-thumbnail');
  const packagesCount = packages.length;

  function refreshDisplayedPackages() {
    for(let i = 0; i < packagesCount; i++) {
      if (i >= limit) {
        packages[i].classList.add('hidden');
      } else {
        packages[i].classList.remove('hidden');
      }
    }
  }

  const loadMoreButton = document.getElementById('loadMorePackagesBtn');
  loadMoreButton.addEventListener('click',() => {
    limit += 16;
    refreshDisplayedPackages();
    if (limit >= packagesCount) {
      const loadMoreSection = document.getElementById('loadMoreSection');
      loadMoreSection.classList.add('hidden');
    }
  },false);

  refreshDisplayedPackages();
</script>