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date-math

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ifeanyi234 / countdown-timer

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A precision Vanilla JavaScript countdown timer demonstrating continuous DOM updates and time-based state management. Features include Date object arithmetic, interval lifecycle handling (Start/Pause/Reset), and real-time millisecond conversion into days, hours, minutes, and seconds.

state-management html5 frontend css3 vanilla-javascript dom-manipulation javscript setinterval countdown-timer time-tracking date-math
  • Updated Jul 27, 2026
  • CSS

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