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WDI Lesson Timer
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Countdown</title> | |
| <style type="text/css"> | |
| html, body { | |
| font-family: helvetica; | |
| font-weight: lighter; | |
| margin: 0; | |
| height: 100%; | |
| } | |
| #buttons { | |
| text-align: center; | |
| position: relative; | |
| top: 50%; | |
| transform: translateY(-50%); | |
| } | |
| button { | |
| font-size: 20px; | |
| padding: 20px; | |
| } | |
| input { | |
| font-size: 20px; | |
| padding: 20px; | |
| width: 60px; | |
| margin-left: 20px; | |
| } | |
| #time { | |
| font-size: 160px; | |
| text-align: center; | |
| position: relative; | |
| top: 50%; | |
| transform: translateY(-50%); | |
| } | |
| .inside-minute { | |
| color: red; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="buttons"> | |
| minutes:<br> | |
| <button>1</button> | |
| <button>2</button> | |
| <button>3</button> | |
| <button>4</button> | |
| <button>5</button> | |
| <button>10</button> | |
| <input id="custom" type="number"> | |
| <button>custom</button> | |
| </div> | |
| <div id="time"></div> | |
| <script> | |
| (function() { | |
| var secs, timer, text, | |
| el = document.getElementById('time'); | |
| document.getElementById('buttons').addEventListener('click', function(evt) { | |
| if (evt.srcElement === document.getElementById('custom')) return; | |
| this.style.display = 'none'; | |
| secs = (evt.srcElement.innerHTML === 'custom') ? | |
| parseInt(document.getElementById('custom').value) * 60 : | |
| parseInt(evt.srcElement.innerHTML) * 60; | |
| updateDisplay(); | |
| timer = setInterval(function() { | |
| secs--; | |
| updateDisplay(); | |
| }, 1000); | |
| }); | |
| function updateDisplay() { | |
| if (secs === 0) { | |
| clearInterval(timer); | |
| text = "BAM!"; | |
| } else { | |
| text = (secs % 60) < 10 ? '0' + secs % 60 : '' + secs % 60; | |
| text = Math.floor(secs / 60).toString() + ':' + text; | |
| } | |
| if (secs === 60) el.className = 'inside-minute'; | |
| el.innerHTML = text; | |
| } | |
| })(); | |
| </script> | |
| </body> | |
| </html> |
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