Pop-up windows refer to windows that pop up automatically when opening web pages, software, mobile apps, etc. The main popular pop-up method is a quick way to quickly enter web games. Filter the message type messages, in reverse order of release time, store redux (truncate the array to limit the length of 3, discard the long message). This template is a flow chart of the technical solution for the pop-up window, and the specific content is for reference.