rum real user monitoring

triggered when Ajax properties ReadyState changed. In this event, when the server response is ready to be processed (that is, readystate=4 and status=200), we specify what task the server will do, and here we specify that the results retrieved from the database be exported to the span label with the id "checkbox." ⑥ through the checkname.php, query the database, will be the query results (that is, the response of the server, the corresponding flowchart in the "Query Database"), the data is stil

the response when the response is ready. Generally for some small request, Async=false is also OK, but at this time do not write onreadystatechange functiononReadyStateChange Event: This event is triggered when Ajax properties ReadyState changed. In this event, when the server response is ready to be processed (that is, readystate=4 and status=200), we specify what task the server will do, and here we specify that the results retrieved from the database be exported to the span label with the id