Unfocus client from input on timer start

index.html

@@ -27,6 +27,7 @@
 				(e, s = t.value.split(':').reduce((a, x) => (60 * a) + +x)) => e.keyCode == 13 && !on
 					? (
 						on = true,
+						t.blur(),
 						tmr = setInterval(() => s == 0
 							? (on = false, clearInterval(tmr), t.value = "")
 							: t.value = (new Date(s-- * 1000)).toISOString().substr(11, 8).replace(/:/g, ' : '), 1000)