[San-Diego-pm] Question

Chris Grau chris at chrisgrau.com
Mon Oct 20 19:34:45 PDT 2008

On Mon, Oct 20, 2008 at 07:26:51PM -0700, Joel Fentin wrote:
> The following is within a perl program on the server. My goal is to
> know the width of the surfer's screen so that I can make adjustments.
> my ($SWW);
> print qq|
> <script language="JavaScript">
>   var SW = screen.width;
> alert(SW);
> </script>|;
> # $SWW = SW;
> ===========================
> How do you get the javascript value into a perl variable?
> If SW is equal to 1280, how do I get that 1280 into $SWW?

Disclaimer #1: I haven't been a web developer for a few years.

When do you want this into a Perl variable?  On form submission?  That
would be easy enough, just have the JavaScript set a hidden input field.
If you want it at an arbitrary time, people use Ajax for that.

Disclaimer #2: I've never developed anything with Ajax.


There are probably a number of other modules that will do the job, but
that one looks like the simplest for a small script (like
CGI::Application versus Catalyst).
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