<s>
MooTools	B-Language
(	O
My	O
Object-Oriented	B-Language
Tools	O
)	O
is	O
a	O
lightweight	O
,	O
object-oriented	B-Language
JavaScript	B-Language
framework	I-Language
.	O
</s>
<s>
It	O
is	O
released	O
under	O
the	O
free	B-License
,	I-License
open-source	I-License
MIT	B-License
License	I-License
.	O
</s>
<s>
MooTools	B-Language
provides	O
the	O
user	O
with	O
a	O
number	O
of	O
options	O
beyond	O
native	O
JavaScript	B-Language
.	O
</s>
<s>
An	O
extensible	O
and	O
modular	O
framework	B-Architecture
allowing	O
developers	O
to	O
choose	O
their	O
own	O
customized	O
combination	O
of	O
components	O
.	O
</s>
<s>
MooTools	B-Language
follows	O
object-oriented	B-Language
practices	O
and	O
the	O
DRY	O
principle	O
.	O
</s>
<s>
Enhancements	O
to	O
the	B-General_Concept
DOM	I-General_Concept
,	O
enabling	O
developers	O
to	O
easily	O
add	O
,	O
modify	O
,	O
select	O
,	O
and	O
delete	O
DOM	B-General_Concept
elements	O
.	O
</s>
<s>
The	O
framework	B-Architecture
includes	O
built-in	O
functions	O
for	O
manipulation	O
of	O
CSS	B-Language
,	O
DOM	B-General_Concept
elements	O
,	O
native	O
JavaScript	B-Language
objects	O
,	O
Ajax	B-General_Concept
requests	O
,	O
DOM	B-General_Concept
effects	O
,	O
and	O
more	O
.	O
</s>
<s>
MooTools	B-Language
also	O
provides	O
a	O
detailed	O
,	O
coherent	O
application	B-Application
programming	I-Application
interface	I-Application
(	O
API	B-Application
)	O
,	O
as	O
well	O
as	O
a	O
custom	O
downloads	O
module	O
allowing	O
developers	O
to	O
download	O
only	O
the	O
modules	O
and	O
dependencies	O
they	O
need	O
for	O
a	O
particular	O
app	O
.	O
</s>
<s>
Valerio	O
Proietti	O
first	O
authored	O
the	O
framework	B-Architecture
and	O
released	O
it	O
in	O
September	O
2006	O
taking	O
as	O
his	O
inspiration	O
Prototype	B-Language
and	O
Dean	O
Edward	O
's	O
.	O
</s>
<s>
MooTools	B-Language
originated	O
from	O
Moo.fx	O
,	O
a	O
popular	O
JavaScript	B-Language
effects	O
library	O
released	O
in	O
October	O
2005	O
by	O
Valerio	O
Proietti	O
as	O
an	O
add-on	O
to	O
the	O
Prototype	B-Language
Javascript	I-Language
Framework	I-Language
.	O
</s>
<s>
It	O
can	O
be	O
used	O
as	O
a	O
lighter	O
alternative	O
to	O
script.aculo.us	B-Language
or	O
other	O
,	O
bigger	O
libraries	O
.	O
</s>
<s>
Whereas	O
Prototype	B-Language
extendedprototypedmany	O
of	O
JavaScript	B-Language
's	O
native	O
String	O
,	O
Array	O
,	O
and	O
Function	O
objects	O
with	O
additional	O
methods	O
,	O
Proietti	O
desired	O
a	O
framework	B-Architecture
that	O
(	O
at	O
the	O
time	O
)	O
further	O
extended	O
the	O
native	O
Element	O
object	O
as	O
well	O
to	O
offer	O
greater	O
control	O
of	O
the	O
Document	B-General_Concept
Object	I-General_Concept
Model	I-General_Concept
(	O
DOM	B-General_Concept
)	O
.	O
</s>
<s>
MooTools	B-Language
includes	O
a	O
number	O
of	O
components	O
,	O
but	O
not	O
all	O
need	O
to	O
be	O
loaded	O
for	O
each	O
application	O
.	O
</s>
<s>
Natives	O
:	O
A	O
collection	O
of	O
JavaScript	B-Language
Native	O
Object	O
enhancements	O
.	O
</s>
<s>
Element	O
:	O
Contains	O
a	O
large	O
number	O
of	O
enhancements	O
and	O
compatibility	O
standardization	O
to	O
the	O
HTML	B-General_Concept
Element	I-General_Concept
object	O
.	O
</s>
<s>
Fx	O
:	O
An	O
advanced	O
effects-API	O
to	O
animate	O
page	O
elements	O
.	O
</s>
<s>
Request	O
:	O
Includes	O
XHR	B-Protocol
interface	O
,	O
Cookie	O
,	O
JSON	B-General_Concept
,	O
and	O
HTML	B-Language
retrieval-specific	O
tools	O
for	O
developers	O
to	O
exploit	O
.	O
</s>
<s>
MooTools	B-Language
is	O
compatible	O
and	O
tested	O
with	O
:	O
</s>
<s>
Every	O
JavaScript	B-Language
framework	I-Language
has	O
its	O
philosophy	O
,	O
and	O
MooTools	B-Language
is	O
interested	O
in	O
taking	O
full	O
advantage	O
of	O
the	O
flexibility	O
and	O
power	O
of	O
JavaScript	B-Language
in	O
a	O
way	O
that	O
emphasizes	O
greater	O
modularity	O
and	O
code	O
reuse	O
.	O
</s>
<s>
MooTools	B-Language
accomplishes	O
these	O
goals	O
intuitively	O
to	O
a	O
developer	O
coming	O
from	O
a	O
class-based	B-Application
inheritance	I-Application
language	O
like	O
Java	O
with	O
the	O
MooTools	B-Language
Class	O
object	O
.	O
</s>
<s>
Class	O
is	O
effortlessly	O
mixed	O
and	O
extended	O
with	O
other	O
Class	O
instantiations	O
allowing	O
for	O
the	O
most	O
excellent	O
focus	O
of	O
MooTools	B-Language
:	O
Code	O
reuse	O
achieved	O
through	O
maximizing	O
the	O
power	O
of	O
JavaScript	B-Language
's	O
prototypical	O
inheritance	O
but	O
in	O
a	O
Class	O
object	O
syntax	O
more	O
familiar	O
to	O
classical	O
inheritance	O
models	O
.	O
</s>
<s>
MooTools	B-Language
contains	O
a	O
robust	O
Class	O
creation	O
and	O
inheritance	O
system	O
that	O
resembles	O
most	O
classically	O
based	O
Object-oriented	B-Language
programming	I-Language
languages	I-Language
.	O
</s>
<s>
For	O
example	O
,	O
the	O
following	O
is	O
MooTools	B-Language
 '	O
equivalent	O
of	O
the	O
examples	O
in	O
Wikipedia	O
's	O
polymorphism	O
page	O
:	O
</s>
