My aim is to offer a “count up” option to user. He/she should be able to add present (or passed) date and a time, hit button “start” and a counter starts dynamically counting years, months, days, hours, minutes and seconds from that. As it’s for a single user, the date/time inserted should be saved in some way, meaning that when user later returns to the page, the countup continues from the time/date previously entered. And some kind of reset button in case the already set time variables need to be changed.
I have found what seems to be a perfect countup script here: https://codepen.io/anuar_ars/pen/ZwXvjW. But it lacks user input. Is it possible to combine that with e.g. this?:
Any other suggestions, hints or advice highly appreciated.