package Foo {
  use Moo;
  has a => (is => "ro");
  has b => (is => "ro");
}

my $bar = Foo->new(a => 42);

# Print only 'a'
say $_ for keys %{ $bar }

# Print all attributes
say $_ for keys( %{
   'Moo'->_constructor_maker_for('Foo')->all_attribute_specs
});

Analyze and debug JavaScript (or Sass or LESS) code bloat through source maps.

The source map explorer determines which file each byte in your minified code came from. It shows you a treemap visualization to help you debug where all the code is coming from.