<s>
cdnjs	B-Application
is	O
a	O
free	B-License
and	I-License
open-source	I-License
software	I-License
(	O
FOSS	B-License
)	O
content	B-Operating_System
delivery	I-Operating_System
network	I-Operating_System
(	O
CDN	B-Operating_System
)	O
hosted	O
by	O
Cloudflare	B-Application
.	O
</s>
<s>
As	O
of	O
May	O
2021	O
,	O
it	O
serves	O
4,013	O
JavaScript	B-Language
and	O
CSS	B-Language
libraries	O
,	O
which	O
are	O
stored	O
publicly	O
on	O
GitHub	B-Application
.	O
</s>
<s>
It	O
is	O
included	O
in	O
millions	O
of	O
websites	O
,	O
or	O
12.4	O
%	O
of	O
the	O
websites	O
on	O
the	O
Internet	O
,	O
making	O
it	O
the	O
second	O
most	O
popular	O
CDN	B-Operating_System
for	O
JavaScript	B-Language
.	O
</s>
<s>
In	O
January	O
2011	O
,	O
Ryan	O
Kirkman	O
and	O
Thomas	O
Davis	O
created	O
the	O
service	O
,	O
launching	O
it	O
on	O
GitHub	B-Application
on	O
February	O
25	O
,	O
2011	O
.	O
</s>
<s>
On	O
June	O
15	O
,	O
2011	O
,	O
cdnjs	B-Application
partnered	O
with	O
Cloudflare	B-Application
,	O
who	O
provided	O
the	O
CDN	B-Operating_System
and	O
subdomain	B-Protocol
cdnjs.cloudflare.com	O
for	O
the	O
project	O
.	O
</s>
<s>
On	O
November	O
1	O
,	O
2019	O
,	O
the	O
founders	O
turned	O
over	O
control	O
of	O
cdnjs	B-Application
to	O
Cloudflare	B-Application
,	O
citing	O
"	O
technical	O
and	O
commercial	O
reasons.	O
"	O
</s>
<s>
According	O
to	O
the	O
community	O
maintainers	O
,	O
the	O
project	O
was	O
difficult	O
to	O
manage	O
because	O
of	O
limited	O
access	O
to	O
the	O
GitHub	B-Application
repository	O
,	O
inactive	O
founders	O
,	O
and	O
a	O
small	O
budget	O
.	O
</s>
<s>
The	O
service	O
is	O
maintained	O
by	O
the	O
community	O
and	O
Cloudflare	B-Application
.	O
</s>
<s>
As	O
of	O
May	O
2021	O
,	O
there	O
have	O
been	O
1,443	O
contributors	O
to	O
the	O
main	O
GitHub	B-Application
repository	O
,	O
and	O
88	O
contributors	O
to	O
the	O
newer	O
package	O
configuration	O
GitHub	B-Application
repository	O
.	O
</s>
<s>
It	O
is	O
also	O
sponsored	O
by	O
DigitalOcean	B-Application
,	O
Algolia	B-Application
,	O
Heroku	B-General_Concept
,	O
Atlassian	O
,	O
Sentry	O
,	O
and	O
Lean20	O
.	O
</s>
<s>
There	O
is	O
a	O
public	O
JSON	B-General_Concept
API	B-General_Concept
for	O
developers	O
to	O
query	O
cdnjs	B-Application
library	O
metadata	O
.	O
</s>
<s>
Resources	O
on	O
cdnjs	B-Application
can	O
be	O
loaded	O
using	O
a	O
number	O
of	O
connection	O
protocols	O
–	O
HTTP/2	B-Protocol
,	O
HTTP	B-Protocol
,	O
HTTPS	B-Protocol
or	O
SPDY	B-Protocol
.	O
</s>
<s>
The	O
cdnjs.cloudflare.com	O
domain	O
is	O
part	O
of	O
the	O
HSTS	B-Protocol
preload	O
list	O
.	O
</s>
<s>
There	O
exist	O
websites	O
that	O
host	O
clones	O
of	O
cdnjs	B-Application
libraries	O
on	O
their	O
own	O
servers	O
:	O
</s>
