Created
April 26, 2022 10:57
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Countdown using JavaScript setInterval
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <meta http-equiv="X-UA-Compatible" content="IE=edge"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <title>JavaScript Countdown</title> | |
| <style> | |
| body { | |
| background-color: #383838; | |
| } | |
| section { | |
| width: 100%; | |
| height: 100vh; | |
| display: flex; | |
| justify-content: center; | |
| align-items: center; | |
| flex-flow: column; | |
| } | |
| h1 { | |
| font-size: 180px; | |
| color: #fff; | |
| text-shadow: 0 0 15px #ff8800; | |
| } | |
| </style> | |
| <script> | |
| let i = 100; | |
| let timer; | |
| function counter() { | |
| timer = setInterval(() => { | |
| i--; | |
| let extraZ = (i < 10) ? '0' : ''; | |
| document.getElementById("counter").innerHTML = extraZ + i; | |
| if(i <= 0) { | |
| clearInterval(timer); | |
| document.getElementById("startBtn").disabled = false; | |
| document.getElementById("stopBtn").disabled = true; | |
| document.getElementById("pauseBtn").disabled = true; | |
| document.getElementById("resumeBtn").disabled = true; | |
| } | |
| }, 1000); | |
| } | |
| function start() { | |
| document.getElementById("startBtn").disabled = true; | |
| document.getElementById("stopBtn").disabled = false; | |
| document.getElementById("pauseBtn").disabled = false; | |
| document.getElementById("resumeBtn").disabled = true; | |
| i = 100; | |
| counter(); | |
| } | |
| function pause() { | |
| clearInterval(timer); | |
| document.getElementById("pauseBtn").disabled = true; | |
| document.getElementById("resumeBtn").disabled = false; | |
| } | |
| function resume() { | |
| counter(); | |
| document.getElementById("pauseBtn").disabled = false; | |
| document.getElementById("resumeBtn").disabled = true; | |
| } | |
| function stop() { | |
| i = 0; | |
| clearInterval(timer); | |
| document.getElementById("counter").innerHTML = "00"; | |
| document.getElementById("startBtn").disabled = false; | |
| document.getElementById("stopBtn").disabled = true; | |
| document.getElementById("pauseBtn").disabled = true; | |
| document.getElementById("resumeBtn").disabled = true; | |
| } | |
| </script> | |
| </head> | |
| <body> | |
| <section> | |
| <h1 id="counter">00</h1> | |
| <div class="btn"> | |
| <button type="button" id="startBtn" onclick="start()">Start</button> | |
| <button type="button" disabled id="pauseBtn" onclick="pause()">Pause</button> | |
| <button type="button" disabled id="resumeBtn" onclick="resume()">Resume</button> | |
| <button type="button" disabled id="stopBtn" onclick="stop()">Stop</button> | |
| </div> | |
| </section> | |
| </body> | |
| </html> |
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