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POAdd a minute to hh:mm with JavaScript
 

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  1. POAdd a minute to hh:mm with JavaScript
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    <p>I'm a PHP programmer who seldom uses Javascript, so I need help figuring out how to accomplish this with JS or JQuery (I currently have jquery-1.7.min.js). I've created three clocks showing the time in different timezones with PHP, and I'd like to use JS to increment the times every minute.</p> <p>The HTML for a clock is like this:</p> <pre><code>&lt;div class="clock"&gt; &lt;div class="pm"&gt;&lt;/div&gt; &lt;div class="time"&gt;11:59&lt;/div&gt; &lt;/div&gt; </code></pre> <p>After adding one minute it should be like this:</p> <pre><code>&lt;div class="clock"&gt; &lt;div class="am"&gt;&lt;/div&gt; &lt;div class="time"&gt;00:00&lt;/div&gt; &lt;/div&gt; </code></pre> <p>This is what I've got so far:</p> <pre><code>var myVar = setInterval(function(){setClocks()},60000); function setClocks() { $(".clock").each(function() { var ampm = $("div:first-child"); var time = $(".time"); // add one minute to time and toggle am/pm if needed time.innerHTML = newTime; } } </code></pre> <p>Any help would be greatly appreciated.</p> <p><strong>UPDATE:</strong></p> <p>I've got it, thanks to Dead133 and kei. This is my updated code:</p> <pre><code>var myVar = setInterval(function(){setClocks()}, 60000); function setClocks() { $(".clock").each(function() { var ampm = $("div:first-child", $(this)); var time = $(".time", $(this)); var parts = time.text().split(':'); var hours = parseInt(parts[0], 10); var minutes = parseInt(parts[1], 10); ++minutes; if (minutes == 60) { minutes = 0; ++hours; if (hours == 12) { ampm.toggleClass('am'); ampm.toggleClass('pm'); } } if (hours &gt; 12) hours -= 12; if (hours.toString().length &lt; 2) hours = "0" + hours; if (minutes.toString().length &lt; 2) minutes = "0" + minutes; time.text(hours + ':' + minutes); }) } </code></pre> <p>Thanks for the help, everybody! I'd done this kind of thing in PHP, so I knew the logic. It was just the JS/JQ that was hanging me up.</p>
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    1. COwhy don't use `Date.getHours()` and `Date.getMinutes()`?
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      1. POAdd a minute to hh:mm with JavaScript
      1. USandy
    2. COAgreed. The text displayed on the page should not be your SPOT (single point of truth). Leverage the browsers system clock, specify your times in offsets relative to that, then just re-render the clocks every minute.
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      1. POAdd a minute to hh:mm with JavaScript
      1. USMike Edwards
    3. CO@andy I didn't want to deal with current time and offsets in my JS, because that doesn't take DST into account. I'm already dealing with that in PHP and just need JS to increment those values every minute after that.
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      1. USgr8dane
 

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