(The WebComponents specification is a series of latest specifications, which can be used to create reusable Web Parts. When the Web Parts used in the page are updated to the new version, no other code in the page need to be repaired. The components mentioned here are visual components that can realize interaction with users. Developers can use HTML code and JavaScript script code to develop these components. The WebComponents specification defines how to develop these widgets. Xbaixing People's Network)