I want to make a date divider like in the Slack app. This is a divider in a select task. Messages belonging to a certain date appear under the divider. When I scroll up the page, the divider goes up to the top of the area in which it is located and starts to act as sticky. When it comes to the previous date, the date inside the divider select changes with the other date and continues to perform the same function. I added the example of what I wanted as a screen recording via loom.