11. One or more non-transitory storage media storing instructions which, when executed by one or more processors, cause: generating a first process for a first document; generating a second process for a second document that is related to the first document; generating a third process for a third document that is related to the first document or the second document; generating, by the first process, a message that includes target content that indicates time data that indicates when the first document loaded, wherein the time data is used after the first document is loaded to determine, at a later time, whether to replace the first document with a fourth document; sending, by the first process, the message to the second process; determining, by the second process, that the third process is to receive the target content within the message; and sending, by the second process, the target content to the third process.
16. The one or more non-transitory storage media of claim 11 , wherein the instructions, when executed by the one or more processors, further cause: generating a fourth process for a fourth document; generating a fifth process for a fifth document that is related to the fourth document; generating a sixth process for a sixth document that is related to the fourth document or the fifth document; wherein two documents of the fourth document, the fifth document, and the sixth document are included in the other document of the fourth document, the fifth document, or the sixth document; generating, by the first process, a message that includes second target content that indicates a highlight instruction that the sixth process is to use to visually distinguish the sixth document.