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Re: How to write a browser based timer

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Gene Wirchenko wrote on 21 feb 2012 in comp.lang.javascript:

> On Tue, 21 Feb 2012 13:04:24 -0800 (PST), Scott Sauyet
> <scott.sauyet@gmail.com> wrote:
> 
> [snip]
> 
>>I assume you mean "appropriate language".
>>
>>You can certainly do what you want with Javascript.  And it shouldn't
>>be difficult.
>>
>>You need to look at three features of Javascript:
>>
>>    - Keyboard Events, to listen for the keystrokes that matter
>>    - setTimeout or setInterval to occasionally check the time
>>    - DOM manipulation to display the results
>>
>>Alternately, you can probably search the web for Javascript stopwatch
>>implementations and find one that either does exactly what you want or
>>could easily be modified to do so.
> 
>      Are they very accurate?
> 
>      Pause a second, update, then repeat will be inaccurate because of
> the execution time being indeterminate.
> 
>      Following the clock will be somewhat more CPU-intensive.

Not at all.

During run, display every [say] 200ms: 
    actualTime - lapStartTime + endCountLastLap 

During pause, display static:
    display endCountLastLap

Reset:
   endCountLastLap = 0
   setPause


> 
>      Assuming it exists, what is the third way that works well?
> 
> Sincerely,
> 
> Gene Wirchenko



-- 
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

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Thread

How to write a browser based timer " Cal Who" <CalWhoNOSPAM@roadrunner.com> - 2012-02-21 15:50 -0500
  Re: How to write a browser based timer Scott Sauyet <scott.sauyet@gmail.com> - 2012-02-21 13:04 -0800
    Re: How to write a browser based timer Gene Wirchenko <genew@ocis.net> - 2012-02-21 13:45 -0800
      Re: How to write a browser based timer "Evertjan." <exjxw.hannivoort@interxnl.net> - 2012-02-21 22:40 +0000
        Re: How to write a browser based timer Gene Wirchenko <genew@ocis.net> - 2012-02-21 15:04 -0800
          Re: How to write a browser based timer "Evertjan." <exjxw.hannivoort@interxnl.net> - 2012-02-21 23:27 +0000
            Re: How to write a browser based timer Gene Wirchenko <genew@ocis.net> - 2012-02-21 16:08 -0800
              Re: How to write a browser based timer "Evertjan." <exjxw.hannivoort@interxnl.net> - 2012-02-22 15:41 +0000
                Re: How to write a browser based timer Gene Wirchenko <genew@ocis.net> - 2012-02-22 09:19 -0800
                Re: How to write a browser based timer "Evertjan." <exjxw.hannivoort@interxnl.net> - 2012-02-22 21:55 +0000
                Re: How to write a browser based timer Gene Wirchenko <genew@ocis.net> - 2012-02-22 15:01 -0800
        Re: How to write a browser based timer RobG <rgqld@iinet.net.au> - 2012-02-21 18:18 -0800
          Re: How to write a browser based timer Dr J R Stockton <reply1208@merlyn.demon.co.uk> - 2012-02-23 19:31 +0000
            Re: How to write a browser based timer Gene Wirchenko <genew@ocis.net> - 2012-02-23 16:38 -0800
              Re: How to write a browser based timer Dr J R Stockton <reply1208@merlyn.demon.co.uk> - 2012-02-25 20:29 +0000
                Re: How to write a browser based timer "Evertjan." <exjxw.hannivoort@interxnl.net> - 2012-02-26 23:02 +0000
      Re: How to write a browser based timer Dr J R Stockton <jrs@merlyn.demon.co.uk> - 2012-02-22 18:51 +0000
    Re: How to write a browser based timer " Cal Who" <CalWhoNOSPAM@roadrunner.com> - 2012-02-23 10:23 -0500
      Re: How to write a browser based timer Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-02-23 22:13 +0100
        Re: How to write a browser based timer Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-02-24 09:41 +0100

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