javascript - Sending the timing from the page load to the last occurrence of a button click? -

javascript - Sending the timing from the page load to the last occurrence of a button click? -

i want maintain track of time takes user utilize configuration page, total time first loading page lastly time user presses save button. pressing save button not reload page.

i not want rely on google's average page time calculation since calculation not count lastly visited page , not accurate.

i perform

ga('send', 'timing', 'savetime', 'savetimevar', timespent);

after every time save button pressed not give me time value want, total time page load lastly save button press. problem due fact impossible know if current save event lastly one.

any ideas?

javascript php jquery google-analytics