There are several sites that you can go to in order to take the challenge yourself. We’ve seen several sites used in the videos on TikTok and each one has a counter that looks slightly different.
Sporcle.com has a game on their quiz site that gives a 30-second timer and the goal is to achieve 300 hits of the spacebar within that time. CodePen has a spacebar counter, but this one doesn’t contain any sort of time limit, but will count to what seems indefinitely. Also, MentalFloss has a spacebar counter quiz that encourages the user to hit 225 strokes of the keyboard within 30 seconds.
To take the challenge, head to one of these sites on your computer and using your phone, record a TikTok video of yourself taking the spacebar challenge.
Source : https://www.distractify.com/p/tiktok-spacebar-challenge