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count-down.js
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| /** | |
| * count-down.js | |
| * | |
| * | |
| * @version 0.1.0 | |
| * @author think49 | |
| * @url https://gist.github.com/think49/10d745ebf9aef92b40e698af695f5d2c | |
| * @license http://www.opensource.org/licenses/mit-license.php (The MIT License) | |
| */ | |
| 'use strict'; | |
| const CountDown = (()=>{ | |
| function handleInterval (countDown, interval) { | |
| countDown.element.textContent = countDown.count; | |
| if (--countDown.count < 0) clearInterval(interval.id), countDown.busy = false; | |
| } | |
| return class CountDown { | |
| constructor (element, count) { | |
| this.element = element; | |
| this.startCount = count; | |
| this.busy = false; | |
| } | |
| start () { | |
| if (this.busy) return; | |
| this.count = this.startCount; | |
| this.busy = true; | |
| const interval = {}; | |
| interval.id = setInterval(handleInterval, 1000, this, interval); | |
| } | |
| } | |
| })(); |
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| <!DOCTYPE html> | |
| <title>test</title> | |
| <style> | |
| .count-down { | |
| font-weight: bold; | |
| font-size: 600%; | |
| line-height: 1em; | |
| padding: 0; | |
| } | |
| </style> | |
| <div class="count-down">0</div> | |
| <script src="./count-down-0.1.0.js"></script> | |
| <script> | |
| 'use strict'; | |
| const cd = new CountDown(document.querySelector('.count-down'), 3); | |
| cd.start(); | |
| cd.start(); | |
| cd.start(); | |
| cd.start(); | |
| </script> |
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