How to use the Layui framework to develop a video player that supports online preview of videos

How to use the Layui framework to develop a video player that supports online preview of videos

Introduction:
With the rapid development of the Internet, videos have become people's daily life and an integral part of the job. Nowadays, thousands of video files exist on the Internet, and users hope to preview and play videos online quickly and easily. This article will introduce how to use the Layui framework to develop a video player that supports online preview of videos, and provide specific code examples.

1. Introduction to Layui Framework
Layui is a lightweight front-end framework developed by the Xianxin team. It is characterized by simplicity, ease of use and expansion. It provides a variety of commonly used components and tools, which are very suitable for quickly building web interfaces.

2. Preparation

1. Download the Layui framework and introduce it into the project.
2. Create an HTML page and introduce Layui’s CSS and JS files.

3. Basic construction of video player

1. Use Layui's container component to create a Div container for displaying videos.

<div id="videoContainer"></div>

2. Use Layui's element component to create a control bar for controlling video playback.

<div id="controlBar">
    <button class="layui-btn layui-btn-primary layui-icon layui-icon-play" id="playButton"></button>
    <button class="layui-btn layui-btn-primary layui-icon layui-icon-pause" id="pauseButton"></button>
    <input type="range" id="progressBar" min="0" max="100" value="0" step="1" />
    <span id="currentTime">00:00</span>/<span id="duration">00:00</span>
</div>

4. Logic implementation of video player

1. Use Layui's JavaScript modularization function to define a VideoPlayer module.

layui.define(['jquery'], function(exports) {
    var $ = layui.jquery;
    
    var VideoPlayer = function(options) {
        this.options = $.extend({}, options);
        this.init();
    };
    
    VideoPlayer.prototype = {
        init: function() {
            this.video = document.createElement('video');
            this.video.src = this.options.src;
            $('#videoContainer').append(this.video);
            
            this.playButton = $('#playButton');
            this.pauseButton = $('#pauseButton');
            this.progressBar = $('#progressBar');
            this.currentTime = $('#currentTime');
            this.duration = $('#duration');
            
            this.bindEvents();
        },
        
        bindEvents: function() {
            var _this = this;
            
            this.playButton.on('click', function() {
                _this.play();
            });
            
            this.pauseButton.on('click', function() {
                _this.pause();
            });
            
            this.progressBar.on('change', function() {
                _this.seek();
            });
            
            this.video.addEventListener('timeupdate', function() {
                _this.updateProgress();
            });
        },
        
        play: function() {
            this.video.play();
        },
        
        pause: function() {
            this.video.pause();
        },
        
        seek: function() {
            var progress = this.progressBar.val();
            var duration = this.video.duration;
            var time = (progress / 100) * duration;
            
            this.video.currentTime = time;
        },
        
        updateProgress: function() {
            var currentTime = this.video.currentTime;
            var duration = this.video.duration;
            var progress = (currentTime / duration) * 100;
            
            this.progressBar.val(progress);
            this.currentTime.text(this.formatTime(currentTime));
            this.duration.text(this.formatTime(duration));
        },
        
        formatTime: function(time) {
            var minutes = Math.floor(time / 60);
            var seconds = Math.floor(time % 60);
            
            return (minutes < 10 ? '0' : '') + minutes + ':' + (seconds < 10 ? '0' : '') + seconds;
        }
    };
    
    exports('VideoPlayer', VideoPlayer);
});

2. Introduce the VideoPlayer module into the HTML page and create a video player instance.

<script src="layui.js"></script>
<script>
layui.use(['jquery', 'VideoPlayer'], function() {
    var $ = layui.jquery;
    var VideoPlayer = layui.VideoPlayer;
    
    var videoPlayer = new VideoPlayer({
        src: 'video.mp4'
    });
});
</script>

5. Summary
This article introduces how to use the Layui framework to develop a video player that supports online preview of videos, and provides specific code examples. Developers can beautify the interface and expand functions based on actual needs to meet video playback needs in different scenarios. I hope this article can provide some help to everyone when developing video players using the Layui framework.

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