<s>
Chakra	B-Language
is	O
a	O
free	B-License
and	I-License
open-source	I-License
JavaScript	B-Language
engine	I-Language
developed	O
by	O
Microsoft	O
for	O
its	O
Microsoft	B-Application
Edge	I-Application
Legacy	I-Application
web	B-Application
browser	I-Application
.	O
</s>
<s>
It	O
is	O
a	O
fork	B-Application
of	O
the	O
same-named	B-Language
JScript	I-Language
engine	I-Language
used	O
in	O
Internet	B-Application
Explorer	I-Application
.	O
</s>
<s>
Like	O
the	O
EdgeHTML	B-Application
browser	B-Protocol
engine	I-Protocol
,	O
the	O
declared	O
intention	O
was	O
that	O
it	O
would	O
reflect	O
the	O
"	O
Living	O
Web	O
"	O
.	O
</s>
<s>
The	O
core	O
components	O
of	O
Chakra	B-Language
were	O
open-sourced	O
as	O
ChakraCore	B-Language
.	O
</s>
<s>
Chakra	B-Language
supports	O
ECMAScript	B-Language
5.1	O
with	O
partial	O
support	O
for	O
ECMAScript	B-Language
2015	O
.	O
</s>
<s>
Following	O
an	O
initial	O
announcement	O
on	O
December	O
5	O
,	O
2015	O
,	O
Microsoft	O
open	O
sourced	O
the	O
Chakra	B-Language
engine	O
as	O
ChakraCore	B-Language
,	O
including	O
all	O
the	O
key	O
components	O
of	O
the	O
JavaScript	B-Language
engine	I-Language
powering	O
Microsoft	B-Application
Edge	I-Application
on	O
their	O
GitHub	B-Application
page	O
under	O
the	B-License
MIT	I-License
License	I-License
on	O
January	O
13	O
,	O
2016	O
.	O
</s>
<s>
ChakraCore	B-Language
is	O
essentially	O
the	O
same	O
as	O
the	O
Chakra	B-Language
engine	O
that	O
powers	O
the	O
Microsoft	B-Application
Edge	I-Application
browser	B-Application
,	O
but	O
with	O
platform-agnostic	O
bindings	O
,	O
i.e.	O
</s>
<s>
without	O
the	O
specific	O
interfaces	O
utilised	O
within	O
the	O
Universal	O
Windows	B-Application
App	O
platform	O
.	O
</s>
<s>
Microsoft	O
has	O
also	O
created	O
a	O
project	O
on	O
GitHub	B-Application
that	O
allows	O
Node.js	B-Language
to	O
use	O
ChakraCore	B-Language
as	O
its	O
JavaScript	B-Language
engine	I-Language
instead	O
of	O
V8	B-Language
.	O
</s>
