JSPL - The bridge between JavaScript and Perl

JSPL is a bridge between Perl and JavaScript (the SpiderMonkey engine specifically). JSPL makes it easier for JavaScript programmers to write stand-alone, out-of-the-browser, applications. For Perl programmers JSPL allows you to extend your application using JavaScript. JSPL is open source software. The core of JSPL is a reflection engine and a life cycle synchronizer allowing you to write programs using both languages at the same time.

To start using JSPL see the README file.

Download 1.07

Examples for JS programmers:

We want to use JavaScript as the general purpose language that it is. But, having been born on the client-side web it was lacking a library. We ended up giving it the best 'library' that we know of: CPAN. Using JSPL you can do:


say('Hello World!');

say('Are you ' + Sys.Env.USER + '?');

    say('My argv: ' + Sys.Argv());

require('POSIX', 'POSIX', -1);

// POSIX.read needs an override, can't pass $buf by reference, so:
POSIX.read = new PerlSub(
    'my $buf; my($fd, $len) = @_; POSIX::read($fd, $buf, $len); $buf'

if(Argv.length != 1) 
    throw new Error("Usage: "+PrgName+" <file>");

var file = Argv[0];
say(sprintf("Opening: '%s'", file));

var fd = POSIX.open(file, POSIX.O_RDONLY);
if(typeof fd == 'undefined') {
    var err = POSIX.errno();
    throw new Error(sprintf("%s (%d)", POSIX.strerror(err), err));
} else {
    POSIX.lseek(fd, -6, POSIX.SEEK_END)
    say("The last 5 chars reads: '", POSIX.read(fd, 5), "'");

require('Gtk2', 'Gtk2');
install('Gtk2.Window', 'Gtk2::Window');
install('Gtk2.Button', 'Gtk2::Button');


var window = new Gtk2.Window('toplevel');
var button = new Gtk2.Button('Quit');

button.signal_connect('clicked', function() {

say('Thats all folks!');


require('DBI', 'DBI');

var dbh = DBI.connect('dbi:SQLite:dbname=foo', '', '');

dbh.do("create table colors(name text primary key, feeling text)");

dbh.do("insert into colors values ('green', 'happy')");
dbh.do("insert into colors values ('black', 'sad')");

var all_colors = dbh.selectall_hashref('select * from colors', 'name');

for(var color in all_colors) {
    say(color + ' is a ' + all_colors[color].feeling + ' color');