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How to quickly create a 3-point loading animation with css
- 藏色散人Original
- 2021-08-25 15:29:283425browse
In the previous article "How to use CSS to create a wavy background? 》Introduced to you how to use CSS to create a wave background. Friends in need can read and learn about it~
Then this article will introduce to you the most common effect implementation in the front-end development process. , which is the implementation of loading animation.
To put it simply, for example, the common web page loading waiting effect loading... is usually a dynamic loading effect.
Now I will introduce to you a very simple and basic method to achieve the effect of loading animation:
Directly enter the code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title></title>
<style>
body {
margin: 0;
padding: 0;
background: black;
display: flex;
flex-direction: row;
align-items: center;
justify-content: center;
height: 100vh;
}
.dot1, .dot2, .dot3 {
background: #fff;
width: 15px;
height: 15px;
border:double;
border-color:black;
border-radius: 50%;
margin: 10px;
}
.dot1 {
animation: jump 1.6s -0.32s linear infinite;
background: #4B0082;
}
.dot2 {
animation: jump 1.6s -0.16s linear infinite;
background: #B22222;
}
.dot3 {
animation: jump 1.6s linear infinite;
background: #006400;
}
@keyframes jump {
0%, 80%, 100% {
-webkit-transform: scale(0);
transform: scale(0);
} 40% {
-webkit-transform: scale(2.0);
transform: scale(2.0);
}
}
</style>
</head>
<body>
<div class="dot1"> </div>
<div class="dot2"></div>
<div class="dot3"></div>
</body>
</html>The effect is as shown below :
The following are two key properties:
-
CSS3
animation(animation) Property
Syntax: animation: name duration timing-function delay iteration-count direction fill-mode play-state;
值 animation-name：指定要绑定到选择器的关键帧的名称 animation-duration：动画指定需要多少秒或毫秒完成 animation-timing-function：设置动画将如何完成一个周期 animation-delay：设置动画在启动前的延迟间隔。 animation-iteration-count：定义动画的播放次数。 animation-direction：指定是否应该轮流反向播放动画。 animation-fill-mode：规定当动画不播放时（当动画完成时，或当动画有一个延迟未开始播放时），要应用到元素的样式。 animation-play-state：指定动画是否正在运行或已暂停。 initial：设置属性为其默认值。 inherit：从父元素继承属性。
CSS3
@keyframesRules
Animations can be created using @keyframes rules. Animation is created by gradually changing from one CSS style setting to another.
During the animation process, the CSS style settings can be changed multiple times. Specify when a change occurs using %, or the keywords "from" and "to", which are the same as 0% to 100%.
0% is when the animation starts, 100% is when the animation is completed. For best browser support, selectors should always be defined as 0% and 100%.
Note: Use the animation attribute to control the appearance of the animation, and also use the selector to bind the animation.
Grammar: @keyframes animationname {keyframes-selector {css-styles;}}
值 animationname：必需的，定义animation的名称。 keyframes-selector：必需的，动画持续时间的百分比。 合法值： 0-100% from (和0%相同) to (和100%相同) 注意：可以用一个动画keyframes-selectors。 css-styles：必需的，一个或多个合法的CSS样式属性。
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