CSS infinite loop animation

CSS Infinite Loop Animation

In front-end development, animation effects have always been the key to attracting users’ attention. In CSS, we can create animation effects using the @keyframes rule. The infinite keyword can be used to set the number of loops for an animation, allowing it to repeat indefinitely. This article will detail the implementation and application of infinitely looping animations in CSS.

@keyframes Rule

In CSS, the @keyframes rule is used to create animations. Using the @keyframes rule, we can define keyframes to control the style changes of an element at different points in time. The following is the syntax of the @keyframes rule:

@keyframes animationName {
0% {
/* Initial state */
}

100% {
/* End state */
}
}

In the @keyframes rule, animationName is the custom animation name, which we can later reference using the animation-name attribute. The percentage value represents the animation’s progress, with 0% representing the start state and 100% representing the end state. Keyframes allow us to define the style of an element at different points in time, such as position, color, and size.

animation Property

In CSS, we use the animation property to define animations. The animation property is a compound property that contains multiple animation property values. Among them, animation-name is used to specify the name of the animation to be applied, animation-duration is used to specify the duration of the animation, animation-timing-function is used to specify the timing function of the animation, animation-delay is used to specify the delay before the animation starts, and animation-iteration-count is used to specify the number of times the animation loops.

Here is the syntax for the animation property:

element {
animation-name: animationName;
animation-duration: 3s;
animation-timing-function: linear;
animation-delay: 0s;
animation-iteration-count: infinite; /* Infinite loop */
}

In the above code, the animation-iteration-count property is set to infinite, indicating that the animation will loop indefinitely. Of course, we can also set a specific number of loops. Additionally, we can set the animation’s direction using the animation-direction property. For example, normal indicates forward playback, while alternate indicates forward playback on odd-numbered iterations and reverse playback on even-numbered iterations.

Infinite Loop Animation Example

Next, let’s use a specific example to demonstrate how to create an infinite looping animation. Let’s say we want to create an animation effect where an element rotates infinitely.

First, we define the keyframe rotate:

@keyframes rotate { 
from { 
transform: rotate(0deg); 
} 

to { 
transform: rotate(360deg); 
} 
} 

Then, we define the element’s style and animation properties:

#box { 
width: 100px; 
height: 100px; 
background-color: red; 
animation-name: rotate; 
animation-duration: 2s; 
animation-timing-function: linear; 
animation-iteration-count: infinite; 
} 

Finally, add the element to the HTML and apply the animation:

<div id="box"></div> 

Through the above code, We’ve defined a red square element, #box, with a width and height of 100px and applied an infinitely looping rotation animation called rotate.

Running Results

When we run the above code in an HTML page, you’ll see that the element #box rotates 360 degrees linearly and infinitely. This animation effect is often used in web design to draw user attention and create a lively and engaging page.

Through this article, we’ve learned how to implement infinitely looping animations in CSS and its application scenarios.