# NAME
Promise::ES6 - ES6-style promises in Perl
# SYNOPSIS
my $promise = Promise::ES6->new( sub {
my ($resolve_cr, $reject_cr) = @_;
# ..
} );
my $promise2 = $promise->then( sub { .. }, sub { .. } );
my $promise3 = $promise->catch( sub { .. } );
my $promise4 = $promise->finally( sub { .. } );
my $resolved = Promise::ES6->resolve(5);
my $rejected = Promise::ES6->reject('nono');
my $all_promise = Promise::ES6->all( \@promises );
my $race_promise = Promise::ES6->race( \@promises );
# DESCRIPTION
This is a rewrite of [Promise::Tiny](
https://metacpan.org/pod/Promise::Tiny) that implements fixes for
certain bugs that proved hard to fix in the original code. This module
also removes superfluous dependencies on [AnyEvent](
https://metacpan.org/pod/AnyEvent) and [Scalar::Util](
https://metacpan.org/pod/Scalar::Util).
The interface is the same, except:
- Promise resolutions and rejections accept exactly one argument,
not a list. (This accords with the standard.)
- A `finally()` method is defined.
- Unhandled rejections are reported via `warn()`. (See below
for details.)
# COMPATIBILITY
Right now this doesn’t try for interoperability with other promise
classes. If that’s something you want, make a feature request.
# UNHANDLED REJECTIONS
As of version 0.05, unhandled rejections prompt a warning _only_ if one
of the following is true:
- 1) The unhandled rejection happens outside of the constructor.
- 2) The unhandled rejection happens via an uncaught exception
(even within the constructor).
# SEE ALSO
If you’re not sure of what promises are, there are several good
introductions to the topic. You might start with
[this one](
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_promises).
