javascript - "Please wait, loading" alert on button click -


i have button- when clicked, alert shows up, prompting input, after user puts in data, data sent server, processed, , result comes out. can last 30 seconds-1 min, because have handle quite large amount of data, need show "loading, please wait" alert, while server-side job running, user won't think things not working.

can offer suggestions, please?
quite new javascript , jquery. have feeling has done ajax, don't know how.

i think same question has been asked here - how display "busy" indicator jquery? , verified answer code provided.


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