Page load into the background, back to refresh, and only refresh once, to avoid unlimited refresh

In a lot of times, we want to load the page in the background to read the data, then you can use Ajax to enter the background query database, and then the data transfer back, but the transmission back may need to refresh to display, we know that Ajax has callback function success and error, We can write the refresh in the callback function, but the problem still exists, the refresh is to reload the page, then the Ajax will be executed, which is caught in the infinite refresh, then can be solved with sessionstorage, but the overall effect seems not very good

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