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How to make a responsive video background using HTML, CSS and jQuery

王林

Oct 24, 2023 am 11:14 AM

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How to make a responsive video background using HTML, CSS and jQuery

In modern web design, video background has become a very popular element. By using HTML, CSS and jQuery, we can easily implement a responsive video background to add dynamic and attractive visual effects to web pages. This article will detail how to make a web page with a responsive video background and provide corresponding code examples.

Preparation
First, we need to prepare a video file suitable as a background. Make sure the video has a small file size so it loads quickly. The video format can be MP4, WebM or Ogg.
HTML Structure
We will use a simple HTML structure to place the video elements and page content. Here is a basic HTML structure example:

<!DOCTYPE html>
<html>
<head>
   <title>响应式视频背景</title>
   <style>
      /* 在这里添加CSS样式 */
   </style>
</head>
<body>
   <video id="bg-video" autoplay loop muted>
      <source src="video.mp4" type="video/mp4">
   </video>
   <div class="content">
      <!-- 页面内容 -->
   </div>
   <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
   <script src="script.js"></script>
</body>
</html>

In the above example, we have placed the video file in the <video></video> tag and added autoplay, loop and muted attributes to achieve automatic video playback, loop playback and mute effects. Video files should be modified according to actual conditions.

CSS Styles
Next, we need to add some CSS styles to define the video element and page content. Here is a basic CSS styling example:

* {
   margin: 0;
   padding: 0;
}

body {
   overflow: hidden;
}

#bg-video {
   position: fixed;
   top: 0;
   left: 0;
   width: 100%;
   height: 100%;
   object-fit: cover;
}

.content {
   position: relative;
   z-index: 1;
   text-align: center;
   padding: 50px;
   color: #fff;
}

In the above example, we set the content of the page (located in <div class="content">) to Position it relative and set its <code>z-index to 1 to ensure the content appears in front of the video background. We also set the body element to overflow: hidden; to ensure that the video only plays in the visible part of the browser window.

jQuery Script
Finally, we will use jQuery to resize the video background to ensure it displays responsively. Here is a simple jQuery script example:

$(document).ready(function() {
   $(window).resize(function() {
      var videoHeight = $(window).height();
      var videoWidth = $(window).width();
      $("#bg-video").css("height", videoHeight);
      $("#bg-video").css("width", videoWidth);
   }).resize();
});

In the above example, we use the $(window).resize() function to detect changes in window size. Whenever the window size changes, we adjust the height and width of the #bg-video element to keep it consistent with the window size.

The above are the basic steps and code examples for using HTML, CSS and jQuery to create a responsive video background. By following the above steps to set up and adjust, we can easily add a dynamic video background with responsive effects to our web pages. I hope this article helps you create responsive video backgrounds!

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