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Valeri173

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Valeri173
Nov 28th, 2021
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  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4. <meta charset="UTF-8">
  5. <meta http-equiv="X-UA-Compatible" content="IE=edge">
  6. <meta name="viewport" content="width=device-width, initial-scale=1.0">
  7. <title>Countdown</title>
  8. </head>
  9. <body>
  10. <input type="text" id="time" style="border:3px solid blue; text-align:center; font-size:2em;" disabled="true"/>
  11. <script>
  12. //setInterval();
  13. window.onload = function() {
  14. countdown(600);
  15. }
  16.  
  17. function countdown(startTime){
  18. let time = startTime;
  19. let output = document.getElementById("time");
  20.  
  21. let timer = setInterval(tick, 1000);
  22.  
  23. function tick() {
  24. time--;
  25. if (time <= 0) {
  26. clearInterval(timer);
  27. }
  28. output.value = `${Math.floor(time / 60)}:${('0' + time % 60).slice(-2)}`;
  29. }
  30. }
  31. </script>
  32.  
  33. </body>
  34. </html>
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