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<!doctype html>
< html lang = "en-us" >
< head >
< meta http-equiv = "Content-Type" content = "text/html; charset=utf-8" >
< title > WebPerl Sync HTTP Demo< / title >
<!--
This is a demo of dynamically loading modules via synchronous
XMLHttpRequests.
WARNING: Please note that https://xhr.spec.whatwg.org/ says:
"Synchronous XMLHttpRequest outside of workers is in the process of
being removed from the web platform as it has detrimental effects to
the end user’
years.)"
The method was first described by LanX at
https://www.perlmonks.org/?node_id=1225490
Thank you! : - )
-->
< script src = "webperl.js" > < / script >
< script type = "text/perl" >
use warnings ;
use 5.028 ;
use WebPerl qw / js js _new / ;
BEGIN {
push @ INC , sub {
my ( undef , $file ) = @ _ ;
# sadly , MetaCPAN doesn 't send CORS headers (yet)
#my $url = ' https : //fastapi.metacpan.org/v1/source/'
# . ( $file = ~ s / \ //::/r =~ s/\.pm$//ir );
# this requires one to copy Dump . pm into web / Data / :
my $url = $file ;
my $xhr = js _new ( 'XMLHttpRequest' ) ;
$xhr - > open ( 'GET' , $url , 0 ) ;
$xhr - > send ( ) ;
if ( $xhr - > { status } == 200 )
{ return \ $xhr - > { responseText } }
else { return }
} ;
}
use Data : : Dump 'pp' ;
js ( 'window' ) - > alert ( pp ( { Hello => "World!" } ) ) ;
< / script >
< / head >
< body >
< p > Output: see JS console< / p >
< / body >
< / html >