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Answer to StackOverflow question: "SetInterval(), ClearInterval() timer questions for javascript" – http://stackoverflow.com/questions/23257873/setinterval-clearinterval-timer-questions-for-javascript/23258830#23258830
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| $(function () { | |
| var rounds = 3; | |
| var states = ['work', 'rest', 'wait']; | |
| var lengths = [3, 1, 2]; // In seconds | |
| var start = $('#start'); | |
| var stop = $('#stop'); | |
| var stats = $('#stats'); | |
| var roundEl = $('#round'); | |
| var stateEl = $('#state'); | |
| var cronoEl = $('#crono'); | |
| var timer; | |
| start.click(function () { | |
| var ctimer, date; | |
| // UI | |
| start.prop('disabled', true); | |
| stop.prop('disabled', false); | |
| stats.show(); | |
| // Start round | |
| nextRound(0); | |
| function nextRound(round) { | |
| // Update UI | |
| roundEl.html(round + 1); | |
| if (round < rounds) { | |
| // Start new round | |
| nextState(round, 0); | |
| } else { | |
| // We have finished | |
| stop.click(); | |
| } | |
| } | |
| function nextState(round, state) { | |
| if (state < states.length) { | |
| stateEl.html(states[state]); | |
| // Start crono UI | |
| time = new Date(); | |
| ctimer = setInterval(crono, 15); | |
| // State timer | |
| timer = setTimeout(function () { | |
| clearInterval(ctimer); | |
| nextState(round, state + 1); | |
| }, lengths[state] * 1000); | |
| } else { | |
| nextRound(round + 1); | |
| } | |
| } | |
| function crono() { | |
| cronoEl.html((((new Date()).getTime() - time.getTime()) / 1000).toFixed(2)); | |
| } | |
| }); | |
| stop.click(function () { | |
| clearTimeout(timer); | |
| start.prop('disabled', false); | |
| stop.prop('disabled', true); | |
| stats.hide(); | |
| }); | |
| }); |
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| <html> | |
| <head> | |
| <style> | |
| .stats { | |
| font-family: Helvetica Neue; | |
| font-size: 40px; | |
| } | |
| .stats .state { | |
| text-transform: uppercase; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <input id="start" value="START" type="button" /> | |
| <input id="stop" value="STOP" type="button" disabled /> | |
| <div id="stats" class="stats" style="display:none;"> | |
| Round: <span id="round"></span><br> | |
| State: <span id="state" class="state"></span><br> | |
| Time: <span id="crono"></span>s<br> | |
| </div> | |
| <script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script> | |
| <script src="app.js"></script> | |
| </body> | |
| </html> |
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