<s>
PhantomJS	B-Protocol
is	O
a	O
discontinued	O
headless	B-Protocol
browser	I-Protocol
used	O
for	O
automating	O
web	O
page	O
interaction	O
.	O
</s>
<s>
PhantomJS	B-Protocol
provides	O
a	O
JavaScript	B-Language
API	O
enabling	O
automated	O
navigation	O
,	O
screenshots	O
,	O
user	O
behavior	O
and	O
assertions	O
making	O
it	O
a	O
common	O
tool	O
used	O
to	O
run	O
browser-based	O
unit	O
tests	O
in	O
a	O
headless	B-Application
system	I-Application
like	O
a	O
continuous	O
integration	O
environment	O
.	O
</s>
<s>
PhantomJS	B-Protocol
is	O
based	O
on	O
WebKit	B-Language
making	O
it	O
a	O
similar	O
browsing	O
environment	O
to	O
Safari	B-Application
and	O
Google	B-Application
Chrome	I-Application
(	O
before	O
Chrome	B-Application
's	O
fork	O
of	O
WebKit	B-Language
evolved	O
into	O
Blink	B-Language
)	O
.	O
</s>
<s>
It	O
is	O
open-source	B-Application
software	I-Application
released	O
under	O
the	O
BSD	B-Operating_System
License	I-Operating_System
.	O
</s>
<s>
PhantomJS	B-Protocol
was	O
released	O
January	O
23	O
,	O
2011	O
by	O
Ariya	B-Protocol
Hidayat	I-Protocol
after	O
several	O
years	O
in	O
development	O
.	O
</s>
<s>
The	O
logo	O
commonly	O
used	O
to	O
pictorially	O
refer	O
to	O
PhantomJS	B-Protocol
is	O
a	O
fluorescent	O
blue	O
ghost	O
atop	O
a	O
black	O
background	O
.	O
</s>
<s>
This	O
refers	O
to	O
the	O
lack	O
of	O
graphical	O
user	O
interface	O
,	O
or	O
main	O
body	O
of	O
the	O
browser	O
,	O
making	O
PhantomJS	B-Protocol
users	O
seem	O
like	O
ghosts	O
.	O
</s>
<s>
In	O
March	O
2018	O
,	O
the	O
development	O
of	O
PhantomJS	B-Protocol
was	O
suspended	O
due	O
to	O
lack	O
of	O
active	O
contributions	O
.	O
</s>
<s>
The	O
PhantomJS	B-Protocol
JavaScript	B-Language
API	O
can	O
be	O
used	O
to	O
open	O
web	O
pages	O
,	O
take	O
screenshots	O
,	O
execute	O
user	O
actions	O
,	O
and	O
run	O
injected	O
JavaScript	B-Language
in	O
the	O
page	O
context	O
.	O
</s>
<s>
PhantomJS	B-Protocol
became	O
valuable	O
enough	O
that	O
similar	O
projects	O
adopted	O
the	O
API	O
as	O
a	O
standard	O
way	O
of	O
interacting	O
with	O
headless	B-Protocol
browsers	I-Protocol
.	O
</s>
<s>
SlimerJS	O
provided	O
a	O
PhantomJS-like	O
API	O
,	O
but	O
on	O
top	O
of	O
Mozilla	B-Operating_System
's	O
Gecko	B-Language
browser	I-Language
engine	I-Language
rather	O
than	O
WebKit	B-Language
.	O
</s>
<s>
Similarly	O
,	O
trifleJS	O
targeted	O
the	O
MSHTML	B-Application
engine	O
of	O
Internet	B-Application
Explorer	I-Application
.	O
</s>
<s>
Shortly	O
after	O
the	O
release	O
of	O
PhantomJS	B-Protocol
,	O
Nicolas	O
Perriault	O
wrote	O
CasperJS	O
,	O
a	O
suite	O
of	O
libraries	O
on	O
top	O
of	O
PhantomJS	B-Protocol
that	O
extend	O
its	O
capabilities	O
as	O
a	O
client	O
for	O
automated	O
web	O
page	O
testing	O
,	O
allowing	O
users	O
to	O
create	O
BDD	O
tests	O
leveraging	O
PhantomJS	B-Protocol
.	O
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
developed	O
a	O
version	O
of	O
YSlow	O
that	O
leverages	O
PhantomJS	B-Protocol
to	O
gather	O
performance	O
metrics	O
for	O
websites	O
.	O
</s>
<s>
Several	O
notable	O
companies	O
have	O
used	O
PhantomJS	B-Protocol
.	O
</s>
<s>
Twitter	B-Application
used	O
QUnit	B-Language
and	O
PhantomJS	B-Protocol
for	O
unit	O
testing	O
as	O
of	O
2015	O
.	O
</s>
<s>
LinkedIn	B-Application
used	O
PhantomJS	B-Protocol
based	O
tools	O
for	O
performance	O
testing	O
as	O
of	O
2011	O
.	O
</s>
<s>
Netflix	O
used	O
Sketchy	O
,	O
a	O
headless	B-Protocol
browser	I-Protocol
built	O
with	O
PhantomJS	B-Protocol
,	O
to	O
understand	O
what	O
it	O
's	O
doing	O
without	O
having	O
to	O
visit	O
the	O
site	O
as	O
of	O
2014	O
.	O
</s>
<s>
Time	O
Warner	O
Cable	O
used	O
PhantomJS	B-Protocol
with	O
CoffeeScript	B-Application
,	O
Jasmine	B-Language
,	O
and	O
JUnit	B-Language
XML	O
for	O
Jenkins	B-Language
continuous	O
integration	O
as	O
of	O
2012	O
.	O
</s>
