过去，在网页上播放音频都是通过第三方插件来播放的，如 Flash、QuickTime 和 Silverlight 等，没有统一的音频播放标准。HTML5 通过 audio 元素来提供在网页中嵌入音频的标准方法-Past, play audio through third-party plug-ins to play on the page, such as Flash, QuickTime and Silverlight, etc., there is no unified standard audio playback. HTML5 audio element to provide a standard way to embed audio web page