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danmu.js

v1.1.13

Published

HTML5 danmu (danmaku) plugin for any DOM element

Downloads

17,224

Readme

概述

运用 danmu.js 可以方便地使用弹幕功能,满足任意 Web DOM 元素使用(包括 video)。弹幕实现了顶部居中、底部居中、彩色弹幕、无遮挡滚动(具体算法参考前端算法之弹幕设计),以及其它常用的弹幕使用方式。

起步

  1. 安装

    $ npm install danmu.js
  2. 使用

  • Step 1:

    <div id="vs"></div>
    <video id="mse" controls>
      <source src="demo.mp4" type="video/mp4" />
    </video>
  • Step 2:

    import DanmuJs from 'danmu.js'
    
    let danmujs = new DanmuJs({
      container: document.getElementById('vs'), //弹幕容器,该容器发生尺寸变化时会自动调整弹幕行为
      containerStyle: {
        //弹幕容器样式
        zIndex: 100
      },
      player: document.getElementsByTagName('video')[0], //配合音视频元素(video或audio)同步使用时需提供该项
      comments: [
        //弹幕预存数组,配合音视频元素(video或audio)同步使用时需提供该项
        {
          duration: 20000, //弹幕持续显示时间,毫秒(最低为5000毫秒)
          //moveV: 100, //弹幕匀速移动速度(单位: px/秒),设置该项时duration无效
          id: '1', //弹幕id,需唯一
          start: 2000, //弹幕出现时间(毫秒)
          prior: true, //该条弹幕优先显示,默认false
          color: true, //该条弹幕为彩色弹幕,默认false
          txt: '长弹幕长弹幕长弹幕长弹幕长弹幕', //弹幕文字内容
          style: {
            //弹幕自定义样式
            color: '#ff9500',
            fontSize: '20px',
            padding: '2px 11px'
          },
          mode: 'top', //显示模式,top顶部居中,bottom底部居中,scroll滚动,默认为scroll
          like: {
            // 点赞相关参数
            el: likeDOM, // el 仅支持传入 dom
            style: {
              // el 绑定样式
              paddingLeft: '10px',
              color: '#ff0000'
            }
          }
          // el: DOM //直接传入一个自定义的DOM元素作为弹幕,使用该项的话会忽略所提供的txt和style
        }
      ],
      area: {
        //弹幕显示区域
        start: 0, //区域顶部到播放器顶部所占播放器高度的比例
        end: 1, //区域底部到播放器顶部所占播放器高度的比例
        lines: undefined // 弹幕虚拟轨道显示行数。当指定行数时,显示范围 start/end 不生效;当弹幕字体大小超过所需要的总虚拟轨道数时,弹幕也不会出现在轨道上,因此请设置好弹幕fontSize及影响弹幕高度的其他样式,让弹幕和轨道高度匹配
      },
      channelSize: 40, // 轨道大小
      mouseControl: true, // 打开鼠标控制, 打开后可监听到 bullet_hover 事件。danmu.on('bullet_hover', function (data) {})
      mouseControlPause: false, // 鼠标触摸暂停。mouseControl: true 生效
      //bOffset: 1000, // 可调节弹幕横向间隔(毫秒)
      defaultOff: true, // 开启此项后弹幕不会初始化,默认初始化弹幕
      chaseEffect: true // 开启滚动弹幕追逐效果, 默认为true
    })

这是 danmu.js 的 npm 使用方法,cdn 使用可以参考示例。DEMO

Properties

danmu.status // 主进程运行状态 'idle' | 'paused' | 'playing' | 'closed'
danmu.state : {
    status: danmu.status,
    comments: Array<CommentData>, // 弹幕数据池
    bullets: Array<Bullet>, // 在轨弹幕数据
    displayArea: { width: number, height: number } // 弹幕显示区域状态
}

API

danmu.start() //弹幕初始化并播放(内部默认已调用)
danmu.pause() //弹幕暂停
danmu.play() //弹幕继续播放
danmu.stop() //弹幕停止并消失

// 单条更新弹幕数据,适合在用户发送弹幕时调用
danmu.sendComment({
  //发送弹幕
  duration: 15000,
  id: 'id',
  start: 3000, //不提供该项则立即发送
  txt: '弹幕内容',
  style: {
    color: '#ff9500',
    fontSize: '20px',
    border: 'solid 1px #ff9500',
    borderRadius: '50px',
    padding: '5px 11px',
    backgroundColor: 'rgba(255, 255, 255, 0.1)'
  }
})

// 批量更新弹幕数据,适合在从接口中获取到批量数据时调用
danmu.updateComments([
  {
    duration: 15000,
    id: 'id',
    start: 3000, //不提供该项则立即发送
    txt: '弹幕内容',
    style: {
      color: '#ff9500',
      fontSize: '20px',
      border: 'solid 1px #ff9500',
      borderRadius: '50px',
      padding: '5px 11px',
      backgroundColor: 'rgba(255, 255, 255, 0.1)'
    }
  },
  ...
])

danmu.setCommentDuration(id, duration) //按照id改变某一个弹幕的持续显示时间
danmu.setAllDuration(mode, duration) // 改变所有弹幕的持续显示时间,包括已加入队列弹幕
danmu.setPlayRate(mode, 1) // 设置弹幕播放速率,在弹幕播放速度上乘以一个系数,控制速度的变化。支持有不同显示时长弹幕的需求
danmu.setCommentID(oldID, newID) //改变某一个弹幕的id
danmu.hide(mode) //屏蔽某一类弹幕(参数可选值 scroll | top | bottom | color)
danmu.show(mode) //显示某一类弹幕(参数可选值 scroll | top | bottom | color)
danmu.setArea(area) // 修改弹幕显示区域, 参考上方config中area的配置
danmu.setOpacity(opacity) // 设置透明度
danmu.setFontSize(size, channelSize) // 设置样式 size 为字体大小 channelSize 如果不需要修改轨道大小则无需传入 channelSize
danmu.setCommentLike(id, {
  el: likeDOM,
  style: {
    paddingLeft: '10px',
    color: '#ff0000'
  }
}) // 这是点赞样式,id 为 commentid

Dev

我们为开发者提供了示例,使用方式如下:

$ git clone [email protected]:bytedance/danmu.js.git
$ cd danmu.js
$ npm install
$ npm run build
$ http-server

访问 http://localhost:8080/demo/index.html

License

MIT