pre-loading

pre-load.html

<div id="loading-page" class="loading-page">
  <div class="loader"></div>
</div>
<div class="content">
  <h1>Page loaded!</h1>
</div>

pre-loading.markdown

Pre-Loading

A Pen by obrenoco on CodePen.

License.

script.js

window.addEventListener("load", () => {
  document.getElementById("loading-page").classList.add("loaded");
});

style.css

body {
  margin: 0;
}

.content {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
}

.loading-page {
  position: absolute;
  width: 100%;
  background-color: black;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.loading-page.loaded {
  transition: transform 0.8s ease-in-out;
  transform: translate(-100%, 0);
}

.loader {
  border: 16px solid #f3f3f3;
  border-top: 16px solid #3498db;
  border-radius: 50%;
  width: 120px;
  height: 120px;
  animation: spin 0.5s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}