Blurry loading

bradtraversy · Oct 8, 2020 · 1fd2712 · 1fd2712
1 parent 8fef070
commit 1fd2712
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diff --git a/blurry-loading/index.html b/blurry-loading/index.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <link rel="stylesheet" href="style.css" />
+    <title>Blurry Loading</title>
+  </head>
+  <body>
+    <section class="bg"></section>
+    <div class="loading-text">0%</div>
+
+    <script src="script.js"></script>
+  </body>
+</html>
diff --git a/blurry-loading/script.js b/blurry-loading/script.js
@@ -0,0 +1,23 @@
+const loadText = document.querySelector('.loading-text')
+const bg = document.querySelector('.bg')
+
+let load = 0
+
+let int = setInterval(blurring, 30)
+
+function blurring() {
+  load++
+
+  if (load > 99) {
+    clearInterval(int)
+  }
+
+  loadText.innerText = `${load}%`
+  loadText.style.opacity = scale(load, 0, 100, 1, 0)
+  bg.style.filter = `blur(${scale(load, 0, 100, 30, 0)}px)`
+}
+
+// https://stackoverflow.com/questions/10756313/javascript-jquery-map-a-range-of-numbers-to-another-range-of-numbers
+const scale = (num, in_min, in_max, out_min, out_max) => {
+  return ((num - in_min) * (out_max - out_min)) / (in_max - in_min) + out_min
+}
diff --git a/blurry-loading/style.css b/blurry-loading/style.css
@@ -0,0 +1,32 @@
+@import url('https://fonts.googleapis.com/css?family=Ubuntu');
+
+* {
+  box-sizing: border-box;
+}
+
+body {
+  font-family: 'Ubuntu', sans-serif;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  height: 100vh;
+  overflow: hidden;
+  margin: 0;
+}
+
+.bg {
+  background: url('https://images.unsplash.com/photo-1576161787924-01bb08dad4a4?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2104&q=80')
+    no-repeat center center/cover;
+  position: absolute;
+  top: -30px;
+  left: -30px;
+  width: calc(100vw + 60px);
+  height: calc(100vh + 60px);
+  z-index: -1;
+  filter: blur(0px);
+}
+
+.loading-text {
+  font-size: 50px;
+  color: #fff;
+}