<s>
Sails.js	B-Language
(	O
or	O
Sails	O
)	O
is	O
a	O
model	O
–	O
view	O
–	O
controller	O
(	O
MVC	O
)	O
web	B-Application
application	I-Application
framework	I-Application
developed	O
atop	O
the	O
Node.js	B-Language
environment	O
,	O
released	O
as	O
free	B-License
and	I-License
open-source	I-License
software	I-License
under	O
the	B-License
MIT	I-License
License	I-License
.	O
</s>
<s>
It	O
is	O
designed	O
to	O
make	O
it	O
easy	O
to	O
build	O
custom	O
,	O
enterprise-grade	O
Node.js	B-Language
web	B-Application
applications	I-Application
and	O
APIs	B-General_Concept
.	O
</s>
<s>
Emulating	O
the	O
MVC	O
architecture	O
of	O
other	O
frameworks	O
,	O
like	O
Ruby	B-Application
on	I-Application
Rails	I-Application
,	O
it	O
offers	O
similar	O
pattern	O
and	O
familiarity	O
,	O
reducing	O
the	O
cognitive	O
burden	O
when	O
switching	O
between	O
other	O
frameworks/languages	O
.	O
</s>
<s>
Sails.js	B-Language
offers	O
a	O
host	O
of	O
features	O
and	O
attributes	O
.	O
</s>
<s>
It	O
is	O
built	O
on	O
Node.js	B-Language
and	O
Express.js	B-Language
,	O
enabling	O
applications	O
to	O
be	O
made	O
with	O
100%	O
JavaScript	B-Language
.	O
</s>
<s>
Like	O
Ruby	B-Application
on	I-Application
Rails	I-Application
,	O
Sails.js	B-Language
provides	O
an	O
object-relational	B-General_Concept
mapping	I-General_Concept
interface	O
using	O
Waterline.js	O
,	O
which	O
abstracts	O
the	O
database	O
interaction	O
.	O
</s>
<s>
This	O
enables	O
a	O
uniform	O
API	B-General_Concept
regardless	O
of	O
the	O
underlying	O
database	O
being	O
used	O
.	O
</s>
<s>
A	O
number	O
of	O
other	O
packages	O
are	O
included	O
to	O
enable	O
fast	O
auto-generated	O
REST	B-Protocol
APIs	I-Protocol
,	O
WebSockets	B-Protocol
by	O
default	O
using	O
Socket.io	B-Language
;	O
and	O
compatibility	O
features	O
making	O
it	O
front-end	O
agnostic	O
so	O
that	O
many	O
tools	O
and	O
frameworks	O
(	O
AngularJS	B-Application
,	O
React.js	B-Application
,	O
Android	B-Application
,	O
iOS	B-Application
,	O
etc	O
.	O
)	O
</s>
