I have a problem. I generate data from mySQL and if there is too much of it, it takes 2-4 seconds for the graph to appear, which can be confusing for users.
Is there a way to insert information into the chart before loading that the chart is loading?
Graph: https://luhamet.cz/teplota-vlhkost/#tep ... 20-01-01.3
Code: https://pastebin.com/guX4x8mT
Thank you very much for your help.