JS 列出 pf 对象

在 JS 中，可以使用 pf（Player Framework）对象来管理和控制音频和视频的播放。pf 对象是 Microsoft 开发的用于 HTML5 和 Silverlight 媒体播放的一个跨平台播放器框架。下面将介绍如何列出 pf 对象。

使用浏览器开发工具

在浏览器中打开一个包含播放器的页面，在页面中右键单击并选择“检查”或“开发者工具”，打开浏览器开发者工具。

在开发者工具中找到“控制台”选项卡，并在控制台中输入以下代码：

console.log(pf);

点击“回车”键，控制台将输出 pf 对象的所有属性和方法，如下所示：

Object {
  "___id": "microsoftPlayer",
  "___param": Object {
    "divId": "player",
    "markup": "<object id='microsoftPlayer' data='data:application/x-silverlight-2,' type='application/x-silverlight-2'\"><param name='source' value='./Player.xap'/><param name='initParams' value='MediaUrl=/media/video.mp4'/><param name='onLoad' value='onSilverlightLoad'/><param name='onError' value='onSilverlightError'/><param name='background' value='white' /><param name='minRuntimeVersion' value='5.0.61118.0' /><param name='autoUpgrade' value='true' /><param name='enableHtmlAccess' value='true' /></object>",
    "params": Object {
      "MediaUrl": "/media/video.mp4"
    }
  },
  "activeVideoPlugin": Object {
    "pluginName": "Html5PlayerFramework.VideoPlugin",
    "plugins": Array[1],
    "options": Object {
      "loadPlayerErrorCode": 0,
      "mediaUrl": "/media/video.mp4",
      "posterUrl": "",
      "autoplay": false,
      "preload": "metadata",
      "playerId": "microsoftPlayer",
      "publicAccessPolicy": "",
      "serverBaseUrl": "",
      "token": "",
      "adaptiveStreaming": false,
      "startAt": 0,
      "autoplayOnError": false,
      "playButtonVisible": true,
      "playButtonText": "Play",
      "pauseButtonText": "Pause",
      "volumeButtonVisible": true,
      "mutedButtonVisible": true,
      "fullscreenButtonVisible": true,
      "timeDisplayVisible": true,
      "timeDisplayFormat": "{0} / {1}",
      "markers": Array[0],
      "multiplexedStreamsEnabled": false,
      "onPause": null,
      "onPlay": null,
      "onEnded": null,
      "onSeek": null,
      "onError": null,
      "onDisplayError": null,
      "onLoad": null,
      "onUpdateLayout": null,
      "onActivateMediaPlugin": null,
      "navigateTo: null
    }
  },
  "activePlugin": Object {
    "pluginName": "Html5PlayerFramework.Silverlight.PlayerPlugin",
    "plugins": Array[1],
    "options": Object {
      "posterUrl": "",
      "autoplay": false,
      "preload": "metadata",
      "playerId": "microsoftPlayer",
      "publicAccessPolicy": "",
      "serverBaseUrl": "",
      "token": "",
      "adaptiveStreaming": false,
      "startAt": 0,
      "html5Test": true,
      "playButtonVisible": true,
      "playButtonText": "Play",
      "pauseButtonText": "Pause",
      "volumeButtonVisible": true,
      "mutedButtonVisible": true,
      "fullscreenButtonVisible": true,
      "timeDisplayVisible": true,
      "timeDisplayFormat": "{0} / {1}",
      "markers": Array[0],
      "multiplexedStreamsEnabled": false,
      "onPause": null,
      "onPlay": null,
      "onEnded": null,
      "onSeek": null,
      "onError": null,
      "onDisplayError": null,
      "onLoad": null,
      "onUpdateLayout": null,
      "onActivateMediaPlugin": null,
      "navigateTo": null
    }
  },
  "autoplayEnabled": false,
  "paused": true,
  "duration": 0,
  "currentTime": 0,
  "bufferedPercentage": 0,
  "volume": 1,
  "muted": false,
  "fullscreen": false,
  "markers": Array[0],
  "onPause": null,
  "onPlay": null,
  "onEnded": null,
  "onSeek": null,
  "onError": null,
  "onDisplayError": null,
  "onLoad": null,
  "onUpdateLayout": null,
  "onActivateMediaPlugin": null,
  "navigateTo": null
}

结论

从输出信息中可以看到 pf 对象包含了播放器的属性和方法，我们可以根据自己的需要使用这些属性和方法来控制音频和视频的播放。