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JavaScript Timer causes FM to stall

Pbeyrouty
in Web Viewer

Featured Replies

I have a small bug I was hoping someone might be able to help me with. I made a very simple JavaScript timer to display the amount of time spent on a task. Obviously it needs to display through the web viewer. It works well enough, however it sometimes causes Filemaker to get stuck when I attempt to leave the layout. This happens in FileMaker Pro and Go. Has anyone ever encountered a similar problem. I've added the code. It currently had a button to activate it for while I'm testing but I'm planning on having it load automatically. 

"data:text/html," &"
<html>
<head>
<script type="text/javascript">


function setCount()
{
var start = " & GetAsNumber(TimePoints|Today_Workers::Time.Start) & ";
var d = new Date();
var t = d.getHours()*3600 + d.getMinutes()*60 + d.getSeconds();
var diff = t - start; 
var h = Math.floor(diff/3600);

var m = Math.floor( (diff - h*3600)/60);
var s = diff - h*3600 - m*60;
if(h<10) {h='0'+h;}
if(m<10) {m='0'+m;}
if(s<10) {s='0'+s;}
var soFar = h + ':' + m + ':' + s;
document.getElementById('timer').innerHTML = soFar;
var run = setInterval( function(){setCount()},1000);
}
 

</script>
</head>
<body>
<p align="center">Time so far is: <b id='timer'>??</b>
<input type='button' onclick='setCount()' value='Show the Time'/>
</p>
</body></html>"
  • 2 weeks later...
  • Author

Ok, it turns out that I made a stupid mistake. Since I'm not too familiar with JavaScript I wasn't considering how the interval function worked. I just realized that by putting setInterval in the function, it was starting a new cycle of timer updates everytime it ran. In other words, every time it ran it created a duplicate timer. This would increase exponentially every second. This inevitably took up all of the resources allocated to FileMaker. By putting setInterval into a separate function it will run the original function every second without a problem.

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https://fmforums.com/topic/88843-javascript-timer-causes-fm-to-stall/
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