Added maxSeconds prop, where timer starts or 'started' #22
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Added a prop to tell where the timer should start or where it "originally started".
<ReactCountdownClock seconds={30} maxSeconds={60} />Will have the timer started halfways.
<ReactCountdownClock seconds={60} maxSeconds={30} />Will not animate until 30 seconds left
Fiddle (converted to js): https://jsfiddle.net/6wgjyqyk/
Video example
I use the timer in a multiplayer game, and when a new client joins there is no way to display how much time has passed, only how much is left. This feature would help with that.