feat: добавить лоадеры Dots, Rotating Text и DNA Strain

— Добавлен dots-pulsating (минимализм на CSS-переменных) — Добавлен rotating-text (эффект переворота букв с использованием JS) — Добавлен dna-strain (научная анимация цепочки ДНК) — Обновлен общий README.md: коллекция расширена до 8 элементов
2026-04-04 22:31:42 +03:00
parent 29324fca97
commit 4145ca07c4
12 changed files with 590 additions and 7 deletions
@@ -0,0 +1,15 @@
+# 🧬 DNA Strain Loader
+
+Элегантная двумерная анимация цепочки ДНК, реализованная на чистом CSS. Имитирует вращение за счет динамического изменения ширины соединительных линий и масштабирования узлов.
+
+### Особенности
+
+- **Pure CSS**: Вся логика вращения построена на `@keyframes` без использования сторонних скриптов.
+- **Pseudo-elements**: Узлы цепочки реализованы через `:before` и `:after`, что минимизирует количество HTML-разметки.
+- **Cascading Delay**: Эффект плавной волны достигается за счет точечной настройки `animation-delay` для 12 последовательных элементов.
+
+### Технические детали
+
+- **Rotation Illusion**: Анимация `rotate-strain` циклически меняет ширину линии от 155px до 0.
+- **Sync Scaling**: Узлы меняют размер (`scale`) и положение синхронно с линией, создавая иллюзию объема.
+- **Webkit Support**: Включены префиксы для стабильной работы в старых версиях браузеров.
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html lang="en" >
+<head>
+  <meta charset="UTF-8">
+  <title>DNA</title>
+<link rel="stylesheet" href="./style.css">
+
+</head>
+<body>
+<!-- partial:index.partial.html -->
+<div class="strain"></div>
+<div class="strain"></div>
+<div class="strain"></div>
+<div class="strain"></div>
+<div class="strain"></div>
+<div class="strain"></div>
+<div class="strain"></div>
+<div class="strain"></div>
+<div class="strain"></div>
+<div class="strain"></div>
+<div class="strain"></div>
+<div class="strain"></div>
+<!-- partial -->
+  
+</body>
+</html>
@@ -0,0 +1,228 @@
+html, body {
+  width: 100%;
+  height: 100%;
+  background-color: #292929;
+  padding-top: 50px;
+}
+
+*, *:before, *:after {
+  box-sizing: border-box;
+  margin: 0;
+  padding: 0;
+}
+
+.strain {
+  width: 155px;
+  height: 1px;
+  background-color: #dbdbdb;
+  position: relative;
+  margin: 0px auto;
+  margin-top: 28px;
+  margin-bottom: 28px;
+  -webkit-animation-name: rotate-strain;
+          animation-name: rotate-strain;
+  -webkit-animation-duration: 1.7s;
+          animation-duration: 1.7s;
+  -webkit-animation-timing-function: linear;
+          animation-timing-function: linear;
+  -webkit-animation-iteration-count: infinite;
+          animation-iteration-count: infinite;
+  -webkit-animation-play-state: running;
+          animation-play-state: running;
+}
+.strain:before {
+  content: "";
+  display: block;
+  position: absolute;
+  width: 18px;
+  height: 18px;
+  border-radius: 50%;
+  background-color: #13b6e2;
+  left: 0;
+  margin-top: -9px;
+  margin-left: -9px;
+  -webkit-animation-name: strain-size-left;
+          animation-name: strain-size-left;
+  -webkit-animation-duration: 1.7s;
+          animation-duration: 1.7s;
+  -webkit-animation-timing-function: linear;
+          animation-timing-function: linear;
+  -webkit-animation-iteration-count: infinite;
+          animation-iteration-count: infinite;
+  -webkit-animation-play-state: running;
+          animation-play-state: running;
+}
+.strain:after {
+  content: "";
+  display: block;
+  position: absolute;
+  width: 18px;
+  height: 18px;
+  border-radius: 50%;
+  background-color: #13b6e2;
+  right: 0;
+  margin-top: -9px;
+  margin-right: -9px;
+  -webkit-animation-name: strain-size-right;
+          animation-name: strain-size-right;
+  -webkit-animation-duration: 1.7s;
+          animation-duration: 1.7s;
+  -webkit-animation-timing-function: linear;
+          animation-timing-function: linear;
+  -webkit-animation-iteration-count: infinite;
+          animation-iteration-count: infinite;
+  -webkit-animation-play-state: running;
+          animation-play-state: running;
+}
+.strain:nth-child(1), .strain:nth-child(1):before, .strain:nth-child(1):after {
+  -webkit-animation-delay: 0.15s;
+          animation-delay: 0.15s;
+}
+.strain:nth-child(2), .strain:nth-child(2):before, .strain:nth-child(2):after {
+  -webkit-animation-delay: 0.3s;
+          animation-delay: 0.3s;
+}
+.strain:nth-child(3), .strain:nth-child(3):before, .strain:nth-child(3):after {
+  -webkit-animation-delay: 0.45s;
+          animation-delay: 0.45s;
+}
+.strain:nth-child(4), .strain:nth-child(4):before, .strain:nth-child(4):after {
+  -webkit-animation-delay: 0.6s;
+          animation-delay: 0.6s;
+}
+.strain:nth-child(5), .strain:nth-child(5):before, .strain:nth-child(5):after {
+  -webkit-animation-delay: 0.75s;
+          animation-delay: 0.75s;
+}
+.strain:nth-child(6), .strain:nth-child(6):before, .strain:nth-child(6):after {
+  -webkit-animation-delay: 0.9s;
+          animation-delay: 0.9s;
+}
+.strain:nth-child(7), .strain:nth-child(7):before, .strain:nth-child(7):after {
+  -webkit-animation-delay: 1.05s;
+          animation-delay: 1.05s;
+}
+.strain:nth-child(8), .strain:nth-child(8):before, .strain:nth-child(8):after {
+  -webkit-animation-delay: 1.2s;
+          animation-delay: 1.2s;
+}
+.strain:nth-child(9), .strain:nth-child(9):before, .strain:nth-child(9):after {
+  -webkit-animation-delay: 1.35s;
+          animation-delay: 1.35s;
+}
+.strain:nth-child(10), .strain:nth-child(10):before, .strain:nth-child(10):after {
+  -webkit-animation-delay: 1.5s;
+          animation-delay: 1.5s;
+}
+.strain:nth-child(11), .strain:nth-child(11):before, .strain:nth-child(11):after {
+  -webkit-animation-delay: 1.65s;
+          animation-delay: 1.65s;
+}
+.strain:nth-child(12), .strain:nth-child(12):before, .strain:nth-child(12):after {
+  -webkit-animation-delay: 1.8s;
+          animation-delay: 1.8s;
+}
+
+@-webkit-keyframes rotate-strain {
+  0% {
+    width: 155px;
+  }
+  25% {
+    width: 0;
+  }
+  50% {
+    width: 155px;
+  }
+  75% {
+    width: 0;
+  }
+  100% {
+    width: 155px;
+  }
+}
+
+@keyframes rotate-strain {
+  0% {
+    width: 155px;
+  }
+  25% {
+    width: 0;
+  }
+  50% {
+    width: 155px;
+  }
+  75% {
+    width: 0;
+  }
+  100% {
+    width: 155px;
+  }
+}
+@-webkit-keyframes strain-size-left {
+  0% {
+    transform: scale(1) translateX(0px);
+  }
+  25% {
+    transform: scale(0.5);
+  }
+  50% {
+    transform: scale(1) translateX(155px);
+  }
+  75% {
+    transform: scale(1.5);
+  }
+  100% {
+    transform: scale(1) translateX(0px);
+  }
+}
+@keyframes strain-size-left {
+  0% {
+    transform: scale(1) translateX(0px);
+  }
+  25% {
+    transform: scale(0.5);
+  }
+  50% {
+    transform: scale(1) translateX(155px);
+  }
+  75% {
+    transform: scale(1.5);
+  }
+  100% {
+    transform: scale(1) translateX(0px);
+  }
+}
+@-webkit-keyframes strain-size-right {
+  0% {
+    transform: scale(1) translateX(0px);
+  }
+  25% {
+    transform: scale(1.5);
+  }
+  50% {
+    transform: scale(1) translateX(-155px);
+  }
+  75% {
+    transform: scale(0.5);
+  }
+  100% {
+    transform: scale(1) translateX(0px);
+  }
+}
+@keyframes strain-size-right {
+  0% {
+    transform: scale(1) translateX(0px);
+  }
+  25% {
+    transform: scale(1.5);
+  }
+  50% {
+    transform: scale(1) translateX(-155px);
+  }
+  75% {
+    transform: scale(0.5);
+  }
+  100% {
+    transform: scale(1) translateX(0px);
+  }
+}
@@ -0,0 +1,101 @@
+$bg: #292929;
+$blue: #13b6e2;
+$gray: #dbdbdb;
+
+@mixin animation-delay($time) {
+	animation-delay: $time;
+}
+
+html, body {
+	width: 100%;
+	height: 100%;
+	background-color: $bg;
+	padding-top: 50px;
+}
+
+*, *:before, *:after {
+	box-sizing: border-box;
+	margin: 0;
+	padding: 0;
+}
+
+.strain {
+	width: 155px;
+	height: 1px;
+	background-color: $gray;
+	position: relative;
+	margin: 0px auto;
+	margin-top: 28px;
+	margin-bottom: 28px;
+	animation-name: rotate-strain;
+	animation-duration: 1.7s;
+	animation-timing-function: linear;
+	animation-iteration-count: infinite;
+	animation-play-state: running;
+	
+	&:before {
+		content: "";
+		display: block;
+		position: absolute;
+		width: 18px;
+		height: 18px;
+		border-radius: 50%;
+		background-color: $blue;
+		left: 0;
+		margin-top: -9px;
+		margin-left: -9px;
+		animation-name: strain-size-left;
+		animation-duration: 1.7s;
+		animation-timing-function: linear;
+		animation-iteration-count: infinite;
+		animation-play-state: running;
+	}
+	
+	&:after {
+		content: "";
+		display: block;
+		position: absolute;
+		width: 18px;
+		height: 18px;
+		border-radius: 50%;
+		background-color: $blue;
+		right: 0;
+		margin-top: -9px;
+		margin-right: -9px;
+		animation-name: strain-size-right;
+		animation-duration: 1.7s;
+		animation-timing-function: linear;
+		animation-iteration-count: infinite;
+		animation-play-state: running;
+	}
+	
+	@for $i from 1 through 12 {
+		&:nth-child(#{$i}), &:nth-child(#{$i}):before, &:nth-child(#{$i}):after {
+			@include animation-delay((.15s * $i));
+		}
+	}	
+}
+
+@keyframes rotate-strain {
+	0% {width: 155px;}
+	25% {width: 0;}	
+	50% {width: 155px;}	
+	75% {width: 0;}
+	100% {width: 155px;}
+}
+
+@keyframes strain-size-left {
+	0% {transform: scale(1) translateX(0px);}	
+	25% {transform: scale(.5);}	
+	50% {transform: scale(1) translateX(155px);}	
+	75% {transform: scale(1.5);}	
+	100% {transform: scale(1) translateX(0px);}
+}
+
+@keyframes strain-size-right {
+	0% {transform: scale(1) translateX(0px);}	
+	25% {transform: scale(1.5);}	
+	50% {transform: scale(1) translateX(-155px);}	
+	75% {transform: scale(.5);}	
+	100% {transform: scale(1) translateX(0px);}
+}