US Patent 9690764 Delivery and display of page previews using shadow DOM

A content server retrieves the code and other content of a page and generates a preview of the page. The page preview could be an image that depicts a snapshot of the page, such as a screenshot, or an image map that includes links selectable by a user. The content server further modifies the original code used to load the page such that the modified code instructs a browser application to render and display the page preview for a first period of time and to render and display the actual page in place of the page preview after the first period of time. The content server may use the shadow document object model (DOM) framework to provide the page preview.