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Stopwatch in javascript
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| Copyright (c) 2010-2015 Giulia Alfonsi <electric.g@gmail.com> | |
| Modified work Copyright 2017 Andy Woods | |
| Permission is hereby granted, free of charge, to any person | |
| obtaining a copy of this software and associated documentation | |
| files (the "Software"), to deal in the Software without | |
| restriction, including without limitation the rights to use, | |
| copy, modify, merge, publish, distribute, sublicense, and/or sell | |
| copies of the Software, and to permit persons to whom the | |
| Software is furnished to do so, subject to the following | |
| conditions: | |
| The above copyright notice and this permission notice shall be | |
| included in all copies or substantial portions of the Software. | |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES | |
| OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT | |
| HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
| WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
| FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
| OTHER DEALINGS IN THE SOFTWARE. |
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| <!doctype html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Stopwatch</title> | |
| </head> | |
| <body onload="show();"> | |
| <div>Time: <span id="time"></span></div> | |
| <script> | |
| var my_stopwatch = stopwatch('stopwatch') | |
| my_stopwatch.start() | |
| </script> | |
| </body> | |
| </html> |
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| var stopwatch = function(my_element_id) { | |
| var $time = document.getElementById(my_element_id) | |
| if(!$time) return | |
| var api = {} | |
| var duration = 50 | |
| var time = 0 | |
| var clocktimer | |
| var h, m, s, ms | |
| function pad(num, size) { | |
| var s = "0000" + String(num) | |
| return s.substr(s.length - size) | |
| } | |
| function formatTime() { | |
| time += duration | |
| h = Math.floor( time / (60 * 60 * 1000) ) | |
| m = Math.floor( time / (60 * 1000) % 60) | |
| s = Math.floor( time / 1000 % 60 ) | |
| ms = time % 1000 / 10 | |
| return pad(h, 2) + ':' + pad(m, 2) + ':' + pad(s, 2) + ':' + pad(ms, 2) | |
| } | |
| function update() { | |
| $time.innerHTML = formatTime() | |
| } | |
| api.start = function() { | |
| clocktimer = setInterval(update, duration) | |
| } | |
| api.stop = function() { | |
| clearInterval(clocktimer) | |
| } | |
| api.formatTime = formatTime | |
| return api | |
| } | |
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In stopwatch.html line 10,
"var my_stopwatch = stopwatch('time')"