<s>
CSS-in-JS	B-Language
is	O
a	O
styling	O
technique	O
by	O
which	O
JavaScript	B-Language
is	O
used	O
to	O
style	O
components	O
.	O
</s>
<s>
When	O
this	O
JavaScript	B-Language
is	O
parsed	O
,	O
CSS	B-Language
is	O
generated	O
(	O
usually	O
as	O
a	O
<style>	O
element	O
)	O
and	O
attached	O
into	O
the	B-General_Concept
DOM	I-General_Concept
.	O
</s>
<s>
It	O
enables	O
the	O
abstraction	O
of	O
CSS	B-Language
to	O
the	O
component	O
level	O
itself	O
,	O
using	O
JavaScript	B-Language
to	O
describe	O
styles	O
in	O
a	O
declarative	O
and	O
maintainable	O
way	O
.	O
</s>
<s>
For	O
example	O
,	O
using	O
styled	O
components	O
in	O
a	O
React	B-Application
project	O
would	O
look	O
like	O
the	O
following	O
:	O
</s>
<s>
Some	O
outcomes	O
that	O
may	O
be	O
achieved	O
through	O
CSS-in-JS	B-Language
can	O
not	O
be	O
obtained	O
using	O
traditional	O
CSS	B-Language
techniques	O
.	O
</s>
<s>
Programmers	O
may	O
also	O
write	O
more	O
modular	O
code	O
,	O
with	O
CSS	B-Language
being	O
encapsulated	O
in	O
the	O
same	O
block	O
as	O
the	O
programmer	O
's	O
JavaScript	B-Language
,	O
scoping	O
it	O
to	O
that	O
module	O
only	O
.	O
</s>
<s>
CSS-in-JS	B-Language
is	O
used	O
by	O
Reddit	B-Application
,	O
Patreon	O
,	O
Target	O
,	O
Atlassian	O
,	O
Vogue	O
,	O
GitHub	B-Application
and	O
Coinbase	O
.	O
</s>
