Web Front-endCSS TutorialCSS Animation Tutorial: Teach you step by step how to implement pulse effects
CSS Animation Tutorial: Teach you step-by-step to implement pulse effects, specific code examples are required
Introduction:
CSS animation is a commonly used effect in web design. It can add energy and visual appeal to web pages. This article will give you an in-depth understanding of how to use CSS to achieve pulse effects, and provide specific code examples to teach you how to complete it step by step.
1. Understand the pulse effect
The pulse effect is a cyclic animation effect, usually used on buttons, icons or other elements to give it a beating and flashing effect. We can easily achieve this effect through CSS animation properties and keyframes.
2. Preparation
Before we start, we need to prepare an HTML document and add an element that needs to add pulse effects. As shown below:
<!DOCTYPE html>
<html>
<head>
<title>CSS脉冲特效教程</title>
<link rel="stylesheet" type="text/css" href="styles.css">
</head>
<body>
<div class="pulse-effect"></div>
</body>
</html>3. CSS style settings
Next, we need to set the style and animation effects of the elements in the CSS file. Add the following code to the styles.css file:
@keyframes pulse {
0% {
transform: scale(1);
opacity: 1;
}
50% {
transform: scale(1.2);
opacity: 0.8;
}
100% {
transform: scale(1);
opacity: 1;
}
}
.pulse-effect {
width: 100px;
height: 100px;
background-color: #ff0000;
border-radius: 50%;
animation: pulse 2s infinite;
} In the above code, we first define a keyframe animation named pulse. Keyframe animation is defined by the @keyframes rule, where 0% represents the state where the animation starts, and 100% represents the state where the animation ends. In this example, we style the element to gradually enlarge and then shrink, and make the element less opaque at 50%.
Then, we added the .pulse-effect class to the element and specified its width, height, background color, rounded corners and other style attributes. Finally, we apply keyframe animation to the element via the animation property and set the duration of the animation to 2 seconds and set it to an infinite loop.
4. View the effect
Save the HTML and CSS files, and then open the HTML file in the browser, you will see a red circle with a pulse effect. The circle will flash repeatedly for 2 seconds.
5. Summary
Through this tutorial, we learned how to use CSS to achieve pulse effects and provided specific code examples. I hope this article can help you better understand CSS animation and provide inspiration for your web design.
Note: The CSS code used in this article is for example reference only. You can modify and upgrade it according to your own needs.
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