Adding a digital clock with HH:MM:SS displaying to storyline

Hi - Great question.

I may be able to help - we are just developing/testing a 'real-time' clock for use in Storyline. It appears to work OK - but still testing

RealtimeClock (profilelearning.com)

The key bit of JavaScript you need is this:

const date = new Date();
const time = date.toTimeString();
const hours = time.substring(0,2);
const minutes = time.substring(3,5);
const seconds = time.substring(6,8);
//Get Player and set variables
var player = GetPlayer();
player.SetVar("H",hours);
player.SetVar("M",minutes);
player.SetVar("S",seconds);

This assumes you have three string variables "H", "M" and "S"  defined in your Storyline Code.