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Create a border animation using CSS

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Sep 08, 2023 am 08:57 AM

使用 CSS 创建边框动画

CSS is used to create beautiful and engaging border animations, which add movement and interest to a web page. To create border animation, we will first need to define a border for the element we want to animate, then we'll use CSS transitions and animations to add movement to the border.

Border animations can be used to create hover effects on buttons, links, and other interactive elements. They can also be used to create loading animations that show progress while a page or element is loading. We can also use border animations on call -to-action buttons to make them more noticeable.

Approach - 1

we will create a hover effect that animates the border of an element when a user hovers over it.

Algorithm

Create an HTML document and define the title as "Hover Effect Border Animation".
Add a pulsing animation to the border with an infinite duration and ease-in-out timing. Fade the border from red to green to blue when the mouse is over the box and disable the pulsating animation
Define the pulsing animation with a keyframe that changes the border color from red to green to blue. Add a div element with a box class to the body of the HTML document
Save and view the HTML file in a web browser to see the hover effect border animation.

The Chinese translation of

Example

is:

Example

<!DOCTYPE html>
<html>
<head>
   <title>Hover Effect Border Animation</title>
   <style>
      /* Set up the body with flexbox to center the box */
      body {
         display: flex;
         justify-content: center;
         align-items: center;
         flex-direction: column;
         background-color: #48b6ff;
         min-height: 100vh;
      }
      /* Style the box with a transparent border */
      .box {
         display: inline-block;
         padding: 10px;
         font-size: 18px;
         color: #333;
         border: 2px solid transparent;
         transition: border 0.5s ease;
         /* Add the pulsing animation to the border */
         animation: border-pulse 2s ease-in-out infinite;
      }
      /* When the box is hovered, change the border to a gradient and disable the pulsing animation */
      .box:hover {
         border-image: linear-gradient(to right, #f00, #0f0, #00f);
         border-image-slice: 1;
         animation: none;
      }
      /* Define the pulsing animation */
      @keyframes border-pulse {
         0% {
            border-color: #f00;
         }
         50% {
            border-color: #0f0;
         }
         100% {
            border-color: #00f;
         }
      }
   </style>
</head>
<body>
   <!-- Add the box element to the HTML -->
   <div class="box">
      Hover over me
   </div>
</body>
</html>

Method - 2

Here, we will create a loading animation by animating the border of the loading icon.

Algorithm

Use the declaration to declare the document type as HTML.
Start the HTML document by opening the tag.
Add the
tag inside the tag.
Inside the
tag, add a tag and set the title of the document to "Loading Border Animation".
Add a
Inside the
Add a CSS rule to style the loading animation by setting its size, shape, border color and animation properties.
Use the @keyframes rule to create an animation named "spin".
Add the transform rule to rotate the element 360 degrees.

Inside the

tag, add an

element with a class of "loading" to display the loading animation. The Chinese translation of

Example

is:

Example

<!DOCTYPE html>
<html>
<head>
   <title>Loading Border Animation</title>
   <style>
      /* Styling the body element to center the loading animation */
      body{
         display: flex;
         justify-content: center;
         align-items: center;
         flex-direction: column;
         min-height: 100vh;
         background-color: rgb(253, 114, 114);
      }

      /* Styling the loading element */
      .loading {
         width: 50px;
         height: 50px;
         border: 5px solid #ccc;
         border-top-color: #3498db; /* Changing the top border color */
         border-radius: 50%; /* Making the border round */
         animation: spin 1s linear infinite; /* Adding animation to spin continuously */
         margin: 50px auto; /* Centering the element with margin */
      }

      /* Defining the animation */
      @keyframes spin {
         to {
            transform: rotate(360deg); /* Rotating the element 360 degrees */
         }
      }
   </style>
</head>
<body>
   <div class="loading"></div> <!-- The loading element -->
</body>
</html>

Approach - 3

We will use CSS to apply a border animation to the call-to-action button.

Algorithm

Create a container and center it.
Style the element with an initially transparent border and transition properties so that the border animates in 0.5 seconds.
Create a hover effect for the element that changes the border to a linear gradient of three colors: red, green, and blue.
Define a keyframe animation called "border-pulse" to change the border color of an element over time.
Apply "border-pulse" animation to the element's initial state.
When the element is hovered over, disable the "border-pulse" animation by setting it to "none".

The Chinese translation of

Example

is:

Example

<!DOCTYPE html>
<html>
<head>
   <title>Call to Action Border Animation</title>
   <style>
      /* Set the background color and center content vertically */
      body {
         background-color: #48b6ff;
         font-family: Arial, sans-serif;
         display: flex;
         justify-content: center;
         align-items: center;
         flex-direction: column;
         min-height: 100vh;
      }
      /* Style the button */
      .cta-button {
         display: inline-block;
         position: relative;
         padding: 16px 32px;
         background-color: #ff4d4d;
         color: #fff;
         font-size: 24px;
         text-transform: uppercase;
         text-decoration: none;
         border: none;
         overflow: hidden;
         transition: all 0.4s ease-out;
      }
      /* Add a pseudo-element to create the border animation */
      .cta-button:before {
         content: "";
         display: block;
         position: absolute;
         top: 0;
         left: 50%;
         width: 0;
         height: 100%;
         background-color: #fff;
         transform: translateX(-50%);
         z-index: -1;
         transition: all 0.4s ease-out;
      }
      /* Change the background and text color on hover */
      .cta-button:hover {
         background-color: #fff;
         color: #ff4d4d;
      }
      /* Animate the pseudo-element to create the border animation */
      .cta-button:hover:before {
         width: 110%;
      }
      </style>
</head>
<body>
   <a href="#" class="cta-button">Click Me</a>
</body>
</html>

Conclusion

However, border animations can sometimes cause performance issues, especially when overused or applied to large elements, resulting in slower page load times and lower overall performance. Some older web browsers may not support certain animation techniques.

We can also create border animations using SVG graphics and JavaScript. They allow for more complex animations and provide more control over animations.

The above is the detailed content of Create a border animation using CSS. For more information, please follow other related articles on the PHP Chinese website!

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