<s>
jQuery	B-Language
is	O
a	O
JavaScript	B-Language
framework	I-Language
designed	O
to	O
simplify	O
HTML	B-General_Concept
DOM	I-General_Concept
tree	O
traversal	O
and	O
manipulation	O
,	O
as	O
well	O
as	O
event	O
handling	O
,	O
CSS	B-Application
animation	I-Application
,	O
and	O
Ajax	B-General_Concept
.	O
</s>
<s>
It	O
is	O
free	B-Application
,	I-Application
open-source	I-Application
software	I-Application
using	O
the	O
permissive	O
MIT	B-License
License	I-License
.	O
</s>
<s>
As	O
of	O
Aug	O
2022	O
,	O
jQuery	B-Language
is	O
used	O
by	O
77%	O
of	O
the	O
10	O
million	O
most	O
popular	O
websites	O
.	O
</s>
<s>
Web	O
analysis	O
indicates	O
that	O
it	O
is	O
the	O
most	O
widely	O
deployed	O
JavaScript	B-Language
library	I-Language
by	O
a	O
large	O
margin	O
,	O
having	O
at	O
least	O
3	O
to	O
4	O
times	O
more	O
usage	O
than	O
any	O
other	O
JavaScript	B-Language
library	I-Language
.	O
</s>
<s>
jQuery	B-Language
's	O
syntax	O
is	O
designed	O
to	O
make	O
it	O
easier	O
to	O
navigate	O
a	O
document	O
,	O
select	O
DOM	B-General_Concept
elements	B-General_Concept
,	O
create	O
animations	O
,	O
handle	O
events	O
,	O
and	O
develop	O
Ajax	B-General_Concept
applications	O
.	O
</s>
<s>
jQuery	B-Language
also	O
provides	O
capabilities	O
for	O
developers	O
to	O
create	O
plug-ins	B-Application
on	O
top	O
of	O
the	O
JavaScript	B-Language
library	I-Language
.	O
</s>
<s>
This	O
enables	O
developers	O
to	O
create	O
abstractions	B-Application
for	O
low-level	O
interaction	O
and	O
animation	O
,	O
advanced	O
effects	O
and	O
high-level	O
,	O
theme-able	O
widgets	O
.	O
</s>
<s>
The	O
modular	O
approach	O
to	O
the	O
jQuery	B-Language
library	I-Language
allows	O
the	O
creation	O
of	O
powerful	O
dynamic	O
web	O
pages	O
and	O
Web	O
applications	O
.	O
</s>
<s>
The	O
set	O
of	O
jQuery	B-Language
core	O
features	O
—	O
DOM	B-General_Concept
element	O
selections	O
,	O
traversal	O
,	O
and	O
manipulation	O
—	O
enabled	O
by	O
its	O
selector	O
engine	O
(	O
named	O
"	O
Sizzle	B-Language
"	O
from	O
v1.3	O
)	O
,	O
created	O
a	O
new	O
"	O
programming	O
style	O
"	O
,	O
fusing	O
algorithms	O
and	O
DOM	B-General_Concept
data	O
structures	O
.	O
</s>
<s>
This	O
style	O
influenced	O
the	O
architecture	O
of	O
other	O
JavaScript	B-Language
frameworks	I-Language
like	O
YUI	B-Language
v3	I-Language
and	O
Dojo	B-General_Concept
,	O
later	O
stimulating	O
the	O
creation	O
of	O
the	O
standard	O
Selectors	O
API	O
.	O
</s>
<s>
Microsoft	O
and	O
Nokia	O
bundle	O
jQuery	B-Language
on	O
their	O
platforms	O
.	O
</s>
<s>
Microsoft	O
includes	O
it	O
with	O
Visual	B-Application
Studio	I-Application
for	O
use	O
within	O
Microsoft	O
's	O
ASP.NET	B-Application
AJAX	I-Application
and	O
ASP.NET	B-Language
MVC	I-Language
frameworks	I-Language
while	O
Nokia	O
has	O
integrated	O
it	O
into	O
the	O
Web	O
Run-Time	O
widget	O
development	O
platform	O
.	O
</s>
<s>
jQuery	B-Language
,	O
at	O
its	O
core	O
,	O
is	O
a	O
Document	B-General_Concept
Object	I-General_Concept
Model	I-General_Concept
(	O
DOM	B-General_Concept
)	O
manipulation	O
library	O
.	O
</s>
<s>
The	B-General_Concept
DOM	I-General_Concept
is	O
a	O
tree-structure	O
representation	O
of	O
all	O
the	O
elements	B-General_Concept
of	O
a	O
Web	O
page	O
.	O
</s>
<s>
jQuery	B-Language
simplifies	O
the	O
syntax	O
for	O
finding	O
,	O
selecting	O
,	O
and	O
manipulating	O
these	O
DOM	B-General_Concept
elements	B-General_Concept
.	O
</s>
<s>
For	O
example	O
,	O
jQuery	B-Language
can	O
be	O
used	O
for	O
finding	O
an	O
element	O
in	O
the	O
document	O
with	O
a	O
certain	O
property	O
(	O
e.g.	O
</s>
<s>
all	O
elements	B-General_Concept
with	O
an	O
h1	O
tag	B-General_Concept
)	O
,	O
changing	O
one	O
or	O
more	O
of	O
its	O
attributes	O
(	O
e.g.	O
</s>
<s>
jQuery	B-Language
also	O
provides	O
a	O
paradigm	O
for	O
event	O
handling	O
that	O
goes	O
beyond	O
basic	O
DOM	B-General_Concept
element	O
selection	O
and	O
manipulation	O
.	O
</s>
<s>
jQuery	B-Language
also	O
aims	O
to	O
incorporate	O
other	O
highly	O
used	O
JavaScript	B-Language
functionality	O
(	O
e.g.	O
</s>
<s>
fade	O
ins	O
and	O
fade	O
outs	O
when	O
hiding	O
elements	B-General_Concept
,	O
animations	O
by	O
manipulating	O
CSS	B-Language
properties	O
)	O
.	O
</s>
<s>
The	O
principles	O
of	O
developing	O
with	O
jQuery	B-Language
are	O
:	O
</s>
<s>
Separation	O
of	O
JavaScript	B-Language
and	O
HTML	B-Language
:	O
The	O
jQuery	B-Language
library	I-Language
provides	O
simple	O
syntax	O
for	O
adding	O
event	O
handlers	O
to	O
the	B-General_Concept
DOM	I-General_Concept
using	O
JavaScript	B-Language
,	O
rather	O
than	O
adding	O
HTML	B-Language
event	O
attributes	O
to	O
call	O
JavaScript	B-Language
functions	O
.	O
</s>
<s>
Thus	O
,	O
it	O
encourages	O
developers	O
to	O
completely	O
separate	O
JavaScript	B-Language
code	O
from	O
HTML	B-General_Concept
markup	I-General_Concept
.	O
</s>
<s>
Brevity	O
and	O
clarity	O
:	O
jQuery	B-Language
promotes	O
brevity	O
and	O
clarity	O
with	O
features	O
like	O
"	O
chainable	O
"	O
functions	O
and	O
shorthand	O
function	O
names	O
.	O
</s>
<s>
Elimination	O
of	O
cross-browser	B-Architecture
incompatibilities	O
:	O
The	O
JavaScript	B-Language
engines	O
of	O
different	O
browsers	O
differ	O
slightly	O
so	O
JavaScript	B-Language
code	O
that	O
works	O
for	O
one	O
browser	O
may	O
not	O
work	O
for	O
another	O
.	O
</s>
<s>
Like	O
other	O
JavaScript	B-Language
toolkits	O
,	O
jQuery	B-Language
handles	O
all	O
these	O
cross-browser	B-Architecture
inconsistencies	O
and	O
provides	O
a	O
consistent	O
interface	O
that	O
works	O
across	O
different	O
browsers	O
.	O
</s>
<s>
Extensibility	B-Architecture
:	O
New	O
events	O
,	O
elements	B-General_Concept
,	O
and	O
methods	O
can	O
be	O
easily	O
added	O
and	O
then	O
reused	O
as	O
a	O
plugin	B-Application
.	O
</s>
<s>
jQuery	B-Language
was	O
originally	O
created	O
in	O
January	O
2006	O
at	O
BarCamp	O
NYC	O
by	O
John	O
Resig	O
,	O
influenced	O
by	O
Dean	O
Edwards	O
 '	O
earlier	O
cssQuery	B-Language
library	O
.	O
</s>
<s>
It	O
is	O
currently	O
maintained	O
by	O
a	O
team	O
of	O
developers	O
led	O
by	O
Timmy	O
Willison	O
(	O
with	O
the	O
jQuery	B-Language
selector	O
engine	O
,	O
Sizzle	B-Language
,	O
being	O
led	O
by	O
Richard	O
Gibson	O
)	O
.	O
</s>
<s>
jQuery	B-Language
was	O
originally	O
licensed	O
under	O
the	O
CC	O
BY-SA	O
2.5	O
,	O
and	O
relicensed	O
to	O
the	B-License
MIT	I-License
license	I-License
in	O
2006	O
.	O
</s>
<s>
At	O
the	O
end	O
of	O
2006	O
,	O
it	O
was	O
dual-licensed	B-License
under	O
GPL	B-License
and	O
MIT	B-License
licenses	I-License
.	O
</s>
<s>
As	O
this	O
led	O
to	O
some	O
confusion	O
,	O
in	O
2012	O
the	O
GPL	B-License
was	O
dropped	O
and	O
is	O
now	O
only	O
licensed	O
under	O
the	B-License
MIT	I-License
license	I-License
.	O
</s>
<s>
In	O
2015	O
,	O
jQuery	B-Language
was	O
used	O
on	O
62.7	O
%	O
of	O
the	O
top	O
1	O
million	O
websites	O
(	O
according	O
to	O
BuiltWith	O
)	O
,	O
and	O
17%	O
of	O
all	O
Internet	O
websites	O
.	O
</s>
<s>
In	O
2017	O
,	O
jQuery	B-Language
was	O
used	O
on	O
69.2	O
%	O
of	O
the	O
top	O
1	O
million	O
websites	O
(	O
according	O
to	O
Libscore	O
)	O
.	O
</s>
<s>
In	O
2018	O
,	O
jQuery	B-Language
was	O
used	O
on	O
78%	O
of	O
the	O
top	O
1	O
million	O
websites	O
.	O
</s>
<s>
In	O
2019	O
,	O
jQuery	B-Language
was	O
used	O
on	O
80%	O
of	O
the	O
top	O
1	O
million	O
websites	O
(	O
according	O
to	O
BuiltWith	O
)	O
,	O
and	O
74.1	O
%	O
of	O
the	O
top	O
10	O
million	O
(	O
per	O
W3Techs	O
)	O
.	O
</s>
<s>
As	O
of	O
Apr	O
2021	O
,	O
jQuery	B-Language
is	O
used	O
by	O
77.8	O
%	O
of	O
the	O
top	O
10	O
million	O
websites	O
(	O
according	O
to	O
W3Techs	O
)	O
.	O
</s>
<s>
jQuery	B-Language
includes	O
the	O
following	O
features	O
:	O
</s>
<s>
Compatibility	O
methods	O
that	O
are	O
natively	O
available	O
in	O
modern	O
browsers	O
,	O
but	O
need	O
fallbacks	O
for	O
old	O
browsers	O
,	O
such	O
as	O
jQuery.inArray( )	O
and	O
jQuery.each( )	O
.	O
</s>
<s>
jQuery	B-Language
3.0	O
and	O
newer	O
supports	O
"	O
current1	O
versions	O
"	O
(	O
meaning	O
the	O
current	O
stable	O
version	O
of	O
the	O
browser	O
and	O
the	O
version	O
that	O
preceded	O
it	O
)	O
of	O
Firefox	B-Application
(	O
and	O
ESR	O
)	O
,	O
Chrome	B-Application
,	O
Safari	B-Application
,	O
and	O
Edge	B-Application
as	O
well	O
as	O
Internet	B-Application
Explorer	I-Application
9	I-Application
and	O
newer	O
.	O
</s>
<s>
On	O
mobile	O
it	O
supports	O
iOS	B-Application
7	O
and	O
newer	O
,	O
and	O
Android	B-Application
4.0	O
and	O
newer	O
.	O
</s>
<s>
The	O
jQuery	B-Language
library	I-Language
is	O
typically	O
distributed	O
as	O
a	O
single	O
JavaScript	B-Language
file	O
that	O
defines	O
all	O
its	O
interfaces	O
,	O
including	O
DOM	B-General_Concept
,	O
Events	O
,	O
and	O
Ajax	B-General_Concept
functions	O
.	O
</s>
<s>
jQuery	B-Language
has	O
a	O
content	B-Operating_System
delivery	I-Operating_System
network	I-Operating_System
(	O
CDN	O
)	O
hosted	O
by	O
MaxCDN	O
.	O
</s>
<s>
Example	O
of	O
linking	O
a	O
copy	O
of	O
the	O
library	O
from	O
jQuery	B-Language
's	O
public	O
CDN	O
:	O
</s>
<s>
jQuery	B-Language
provides	O
two	O
kinds	O
of	O
functions	O
,	O
static	B-Language
utility	I-Language
functions	I-Language
and	O
jQuery	B-Language
object	B-Language
methods	I-Language
.	O
</s>
<s>
Both	O
are	O
accessed	O
through	O
jQuery	B-Language
's	O
main	O
identifier	O
:	O
jQuery	B-Language
.	O
</s>
<s>
The	O
jQuery	B-Language
function	O
is	O
a	O
factory	B-Language
for	O
creating	O
a	O
jQuery	B-Language
object	O
that	O
represents	O
one	O
or	O
more	O
DOM	B-General_Concept
nodes	O
.	O
</s>
<s>
jQuery	B-Language
objects	O
have	O
methods	O
to	O
manipulate	O
these	O
nodes	O
.	O
</s>
<s>
These	O
methods	O
(	O
sometimes	O
called	O
commands	O
)	O
,	O
are	O
chainable	O
as	O
each	O
method	O
also	O
returns	O
a	O
jQuery	B-Language
object	O
.	O
</s>
<s>
Access	O
to	O
and	O
manipulation	O
of	O
multiple	O
DOM	B-General_Concept
nodes	O
in	O
jQuery	B-Language
typically	O
begins	O
with	O
calling	O
the	O
$	O
function	O
with	O
a	O
CSS	B-Language
selector	O
string	O
.	O
</s>
<s>
This	O
returns	O
a	O
jQuery	B-Language
object	O
referencing	O
all	O
the	O
matching	O
elements	B-General_Concept
in	O
the	O
HTML	B-Language
page	O
.	O
</s>
<s>
$( 	O
"	O
div.test	O
"	O
)	O
,	O
for	O
example	O
,	O
returns	O
a	O
jQuery	B-Language
object	O
with	O
all	O
the	O
div	O
elements	B-General_Concept
of	O
class	O
test	O
.	O
</s>
<s>
This	O
node	O
set	O
can	O
be	O
manipulated	O
by	O
calling	O
methods	O
on	O
the	O
returned	O
jQuery	B-Language
object	O
.	O
</s>
<s>
These	O
are	O
utility	O
functions	O
and	O
do	O
not	O
directly	O
act	O
upon	O
a	O
jQuery	B-Language
object	O
.	O
</s>
<s>
They	O
are	O
accessed	O
as	O
static	B-Language
methods	I-Language
on	O
the	O
jQuery	B-Language
or	O
$	O
identifier	O
.	O
</s>
<s>
For	O
example	O
,	O
$.ajax( )	O
is	O
a	O
static	O
method	O
.	O
</s>
<s>
jQuery	B-Language
provides	O
a	O
$.noConflict( )	O
function	O
,	O
which	O
relinquishes	O
control	O
of	O
the	O
$	O
name	O
.	O
</s>
<s>
This	O
is	O
useful	O
if	O
jQuery	B-Language
is	O
used	O
on	O
a	O
Web	O
page	O
also	O
linking	O
another	O
library	O
that	O
demands	O
the	O
$	O
symbol	O
as	O
its	O
identifier	O
.	O
</s>
<s>
In	O
no-conflict	O
mode	O
,	O
developers	O
can	O
use	O
jQuery	B-Language
as	O
a	O
replacement	O
for	O
$	O
without	O
losing	O
functionality	O
.	O
</s>
<s>
Typically	O
,	O
jQuery	B-Language
is	O
used	O
by	O
putting	O
initialization	O
code	O
and	O
event	O
handling	O
functions	O
in	O
$( handler	O
)	O
.	O
</s>
<s>
This	O
is	O
triggered	O
by	O
jQuery	B-Language
when	O
the	O
browser	O
has	O
finished	O
constructing	O
the	B-General_Concept
DOM	I-General_Concept
for	O
the	O
current	O
Web	O
page	O
.	O
</s>
<s>
Historically	O
,	O
$( document	O
)	O
.ready(callback )	O
has	O
been	O
the	O
de	O
facto	O
idiom	O
for	O
running	O
code	O
after	O
the	B-General_Concept
DOM	I-General_Concept
is	O
ready	O
.	O
</s>
<s>
However	O
,	O
since	O
jQuery	B-Language
3.0	O
,	O
developers	O
are	O
encouraged	O
to	O
use	O
the	O
much	O
shorter	O
$( handler	O
)	O
signature	O
instead	O
.	O
</s>
<s>
jQuery	B-Language
object	B-Language
methods	I-Language
typically	O
also	O
return	O
a	O
jQuery	B-Language
object	O
,	O
which	O
enables	O
the	O
use	O
of	O
method	O
chains	O
:	O
</s>
<s>
This	O
line	O
finds	O
all	O
div	O
elements	B-General_Concept
with	O
class	O
attribute	O
test	O
,	O
then	O
registers	O
an	O
event	O
handler	O
on	O
each	O
element	O
for	O
the	O
"	O
click	O
"	O
event	O
,	O
then	O
adds	O
the	O
class	O
attribute	O
foo	O
to	O
each	O
element	O
.	O
</s>
<s>
Certain	O
jQuery	B-Language
object	B-Language
methods	I-Language
retrieve	O
specific	O
values	O
(	O
instead	O
of	O
modifying	O
state	O
)	O
.	O
</s>
<s>
In	O
these	O
cases	O
,	O
a	O
statement	O
such	O
as	O
$( '#user-email'	O
)	O
.val( )	O
cannot	O
be	O
used	O
for	O
chaining	O
as	O
the	O
return	O
value	O
does	O
not	O
reference	O
a	O
jQuery	B-Language
object	O
.	O
</s>
<s>
Besides	O
accessing	O
existing	O
DOM	B-General_Concept
nodes	O
through	O
jQuery	B-Language
,	O
it	O
is	O
also	O
possible	O
to	O
create	O
new	O
DOM	B-General_Concept
nodes	O
,	O
if	O
the	O
string	O
passed	O
as	O
the	O
argument	O
to	O
$( 	O
)	O
factory	B-Language
looks	O
like	O
HTML	B-Language
.	O
</s>
<s>
For	O
example	O
,	O
the	O
below	O
code	O
finds	O
an	O
HTML	B-Language
select	O
element	O
,	O
and	O
creates	O
a	O
new	O
option	O
element	O
with	O
value	O
"	O
VAG	O
"	O
and	O
label	O
"	O
Volkswagen	O
"	O
,	O
which	O
is	O
then	O
appended	O
to	O
the	O
select	O
menu	O
:	O
</s>
<s>
It	O
is	O
possible	O
to	O
make	O
Ajax	B-General_Concept
requests	O
(	O
with	O
cross-browser	B-Architecture
support	O
)	O
with	O
$.ajax( )	O
to	O
load	O
and	O
manipulate	O
remote	O
data	O
.	O
</s>
<s>
These	O
promise	B-Operating_System
callbacks	I-Operating_System
must	O
be	O
used	O
due	O
to	O
the	O
asynchronous	O
nature	O
of	O
Ajax	B-General_Concept
requests	O
.	O
</s>
<s>
jQuery	B-Language
's	O
architecture	O
allows	O
developers	O
to	O
create	O
plug-in	B-Application
code	O
to	O
extend	O
its	O
function	O
.	O
</s>
<s>
There	O
are	O
thousands	O
of	O
jQuery	B-Language
plug-ins	B-Application
available	O
on	O
the	O
Web	O
that	O
cover	O
a	O
range	O
of	O
functions	O
,	O
such	O
as	O
Ajax	B-General_Concept
helpers	O
,	O
Web	O
services	O
,	O
datagrids	O
,	O
dynamic	O
lists	O
,	O
XML	B-Protocol
and	O
XSLT	B-Application
tools	O
,	O
drag	O
and	O
drop	O
,	O
events	O
,	O
cookie	B-Application
handling	O
,	O
and	O
modal	O
windows	O
.	O
</s>
<s>
An	O
important	O
source	O
of	O
jQuery	B-Language
plug-ins	B-Application
is	O
the	O
plugins	B-Application
sub-domain	O
of	O
the	O
jQuery	B-Language
Project	O
website	O
.	O
</s>
<s>
The	O
plugins	B-Application
in	O
this	O
subdomain	O
,	O
however	O
,	O
were	O
accidentally	O
deleted	O
in	O
December	O
2011	O
in	O
an	O
attempt	O
to	O
rid	O
the	O
site	O
of	O
spam	O
.	O
</s>
<s>
The	O
new	O
site	O
is	O
a	O
GitHub-hosted	O
repository	O
,	O
which	O
required	O
developers	O
to	O
resubmit	O
their	O
plugins	B-Application
and	O
to	O
conform	O
to	O
new	O
submission	O
requirements	O
.	O
</s>
<s>
jQuery	B-Language
provides	O
a	O
"	O
Learning	O
Center	O
"	O
that	O
can	O
help	O
users	O
understand	O
JavaScript	B-Language
and	O
get	O
started	O
developing	O
jQuery	B-Language
plugins	B-Application
.	O
</s>
<s>
In	O
order	O
to	O
create	O
these	O
plug-ins	B-Application
,	O
developers	O
can	O
either	O
choose	O
to	O
write	O
their	O
own	O
code	O
from	O
scratch	O
or	O
build	O
on	O
top	O
of	O
an	O
existing	O
structure	O
such	O
as	O
the	O
.	O
</s>
<s>
Version	O
Initial	O
release	O
Latest	O
update	O
Minified	O
size	O
(	O
KB	O
)	O
Additional	O
notes	O
1.0	O
First	O
stable	O
release	O
1.1	O
1.2	O
1.2.6	O
54.5	O
1.3	O
1.3.2	O
55.9	O
Sizzle	B-Language
Selector	O
Engine	O
introduced	O
into	O
core	O
1.4	O
1.4.4	O
76.7	O
1.5	O
1.5.2	O
83.9	O
Deferred	O
callback	O
management	O
,	O
ajax	B-General_Concept
module	O
rewrite	O
1.6	O
1.6.4	O
(	O
)	O
89.5	O
Significant	O
performance	O
improvements	O
to	O
the	O
attr( )	O
and	O
val( )	O
functions	O
1.7	O
1.7.2	O
(	O
)	O
92.6	O
New	O
Event	O
APIs	O
:	O
.on( )	O
and	O
.off( )	O
,	O
while	O
the	O
old	O
APIs	O
are	O
still	O
supported	O
.	O
</s>
<s>
1.8	O
1.8.3	O
(	O
)	O
91.4	O
Sizzle	B-Language
Selector	O
Engine	O
rewritten	O
,	O
improved	O
animations	O
and	O
$( html	O
,	O
props	O
)	O
flexibility	O
.	O
</s>
<s>
1.9	O
1.9.1	O
(	O
)	O
90.5	O
Removal	O
of	O
deprecated	O
interfaces	O
and	O
code	O
cleanup	O
1.10	O
1.10.2	O
(	O
)	O
90.9	O
Incorporated	O
bug	O
fixes	O
and	O
differences	O
reported	O
from	O
both	O
the	O
1.9	O
and	O
2.0	O
beta	O
cycles	O
1.11	O
1.11.3	O
(	O
)	O
93.7	O
1.12	O
1.12.4	O
(	O
)	O
94.9	O
2.0	O
2.0.3	O
(	O
)	O
81.7	O
Dropped	O
IE	O
6	O
–	O
8	O
support	O
for	O
performance	O
improvements	O
and	O
reduction	O
in	O
filesize	O
2.1	O
2.1.4	O
(	O
)	O
82.4	O
2.2	O
2.2.4	O
(	O
)	O
83.6	O
3.0	O
3.0.0	O
(	O
)	O
84.3	O
Promises/A	O
+	O
support	O
for	O
Deferreds	O
,	O
$	O
.ajax	O
and	O
$	O
.when	O
,	O
.data( )	O
HTML5-compatible	O
3.1	O
3.1.1	O
(	O
)	O
84.7	O
jQuery.readyException	O
added	O
,	O
ready	O
handler	O
errors	O
are	O
now	O
not	O
silenced	O
3.2	O
3.2.1	O
(	O
)	O
84.6	O
Added	O
support	O
for	O
retrieving	O
contents	O
of	O
<template>	O
elements	B-General_Concept
,	O
and	O
deprecation	O
of	O
various	O
old	O
methods	O
.	O
</s>
<s>
QUnit	B-Language
is	O
a	O
test	O
automation	O
framework	O
used	O
to	O
test	O
the	O
jQuery	B-Language
project	O
.	O
</s>
<s>
The	O
jQuery	B-Language
team	O
developed	O
it	O
as	O
an	O
in-house	O
unit	O
testing	O
library	O
.	O
</s>
<s>
The	O
jQuery	B-Language
team	O
uses	O
it	O
to	O
test	O
its	O
code	O
and	O
plugins	B-Application
,	O
but	O
it	O
can	O
test	O
any	O
generic	O
JavaScript	B-Language
code	O
,	O
including	O
server-side	O
JavaScript	B-Language
code	O
.	O
</s>
<s>
As	O
of	O
2011	O
,	O
the	O
jQuery	B-Language
Testing	O
Team	O
uses	O
QUnit	B-Language
with	O
TestSwarm	O
to	O
test	O
each	O
jQuery	B-Language
codebase	O
release	O
.	O
</s>
<s>
As	O
cross-browser	B-Architecture
compatibility	I-Architecture
is	O
no	O
longer	O
as	O
much	O
of	O
an	O
issue	O
,	O
most	O
of	O
jQuery	B-Language
can	O
nowadays	O
be	O
replaced	O
with	O
modern	O
web	O
standards	O
,	O
without	O
losing	O
much	O
convenience	O
.	O
</s>
<s>
Partly	O
due	O
to	O
this	O
,	O
GitHub	B-Application
removed	O
jQuery	B-Language
from	O
its	O
pages	O
in	O
2018	O
.	O
</s>
