The source element enables multiple media sources to be specified for audio and video elements.
empty (void element)
global attributes & src★ & type & media
The source element is a void element. A source element must have a start tag but must not have an end tag.
Each separate media source specified within a source element is a complete set of media data — for example, a complete video file, or a complete audio file).
interface HTMLSourceElement : HTMLElement {
attribute DOMString src;
attribute DOMString type;
attribute DOMString media;
};