ONLINE CONTENT MANAGEMENT SYSTEM WITH UNDO AND REDO OPERATIONS

Techniques are disclosed for facilitating the process of undoing and redoing modifications that are made to content using an online content management system (CMS). As a user makes changes to content, such as by editing a webpage using a web-based CMS, a history of the user's modifications is generated and stored locally on the client. When the user invokes an undo command, the modification history can be used to determine a previous state of the content and restore the content to that previous state. Similarly, when the user invokes a redo command, the modification history can be used to return to a state that had previously been undone. In some embodiments, the process of undoing or redoing the user's modifications is selectively performed on either a client side or a server side of the online system, depending on the type of content that is being manipulated.