<s>
KHTML	B-Language
is	O
a	O
browser	B-Protocol
engine	I-Protocol
developed	O
by	O
the	O
KDE	B-Application
project	O
.	O
</s>
<s>
It	O
is	O
the	O
default	O
engine	O
of	O
the	O
Konqueror	B-Application
browser	B-Application
,	O
but	O
it	O
has	O
not	O
been	O
actively	O
worked	O
on	O
since	O
2016	O
.	O
</s>
<s>
Moreover	O
,	O
KHTML	B-Language
will	O
be	O
discontinued	O
for	O
KDE	B-Language
Frameworks	I-Language
6	O
.	O
</s>
<s>
Built	O
on	O
the	O
KParts	B-Language
framework	O
and	O
written	O
in	O
C++	B-Language
,	O
KHTML	B-Language
had	O
relatively	O
good	O
support	O
for	O
Web	O
standards	O
during	O
its	O
prime	O
.	O
</s>
<s>
Engines	O
forked	O
from	O
KHTML	B-Language
are	O
used	O
by	O
some	O
of	O
the	O
world	O
's	O
most	O
widely	O
used	O
browsers	B-Application
,	O
among	O
them	O
Google	B-Application
Chrome	I-Application
,	O
Safari	B-Application
,	O
Opera	B-Application
,	O
Vivaldi	B-Language
,	O
and	O
Microsoft	B-Application
Edge	I-Application
.	O
</s>
<s>
KHTML	B-Language
was	O
preceded	O
by	O
an	O
earlier	O
engine	O
called	O
khtmlw	O
or	O
the	O
KDE	B-Application
HTML	B-Language
Widget	O
,	O
developed	O
by	O
Torben	O
Weis	O
and	O
Martin	O
Jones	O
,	O
which	O
implemented	O
support	O
for	O
HTML	B-Language
3.2	O
,	O
HTTP	B-Protocol
1.0	I-Protocol
,	O
and	O
HTML	B-General_Concept
frames	I-General_Concept
,	O
but	O
not	O
the	O
W3C	O
DOM	B-General_Concept
,	O
CSS	B-Language
,	O
or	O
JavaScript	B-Language
.	O
</s>
<s>
KHTML	B-Language
itself	O
came	O
into	O
existence	O
on	O
November	O
4	O
,	O
1998	O
,	O
as	O
a	O
fork	B-Application
of	O
the	O
khtmlw	O
library	O
,	O
with	O
some	O
slight	O
refactoring	O
and	O
the	O
addition	O
of	O
Unicode	O
support	O
and	O
changes	O
to	O
support	O
the	O
move	O
to	O
Qt	B-Language
2	O
.	O
</s>
<s>
Waldo	O
Bastian	O
was	O
among	O
those	O
who	O
did	O
the	O
work	O
of	O
creating	O
that	O
early	O
version	O
of	O
KHTML	B-Language
.	O
</s>
<s>
The	O
real	O
work	O
on	O
KHTML	B-Language
actually	O
started	O
between	O
May	O
and	O
October	O
1999	O
,	O
with	O
the	O
realization	O
that	O
the	O
choice	O
facing	O
the	O
project	O
was	O
"	O
either	O
do	O
a	O
significant	O
effort	O
to	O
move	O
KHTML	B-Language
forward	O
or	O
to	O
use	O
Mozilla	B-Operating_System
"	O
and	O
with	O
adding	O
support	O
for	O
JavaScript	B-Language
as	O
the	O
highest	O
priority	O
.	O
</s>
<s>
So	O
in	O
May	O
1999	O
,	O
Lars	O
Knoll	O
began	O
doing	O
research	O
with	O
an	O
eye	O
toward	O
implementing	O
the	O
W3C	O
DOM	B-General_Concept
specification	O
,	O
finally	O
announcing	O
on	O
August	O
16	O
,	O
1999	O
that	O
he	O
had	O
checked	O
in	O
what	O
amounted	O
to	O
a	O
complete	O
rewrite	O
of	O
the	O
KHTML	B-Language
library	O
—	O
changing	O
KHTML	B-Language
to	O
use	O
the	O
standard	O
W3C	O
DOM	B-General_Concept
as	O
its	O
internal	O
document	O
representation	O
.	O
</s>
<s>
That	O
in	O
turn	O
allowed	O
the	O
beginnings	O
of	O
JavaScript	B-Language
support	O
to	O
be	O
added	O
in	O
October	O
1999	O
,	O
with	O
the	O
integration	O
of	O
Harri	O
Porten	O
's	O
KJS	B-Language
following	O
shortly	O
afterwards	O
.	O
</s>
<s>
In	O
the	O
closing	O
months	O
of	O
1999	O
and	O
first	O
few	O
months	O
of	O
2000	O
,	O
Knoll	O
did	O
further	O
work	O
with	O
Antti	O
Koivisto	O
and	O
Dirk	O
Mueller	O
to	O
add	O
CSS	B-Language
support	O
and	O
to	O
refine	O
and	O
stabilize	O
the	O
KHTML	B-Language
architecture	O
,	O
with	O
most	O
of	O
that	O
work	O
being	O
completed	O
by	O
March	O
2000	O
.	O
</s>
<s>
Among	O
other	O
things	O
,	O
those	O
changes	O
enabled	O
KHTML	B-Language
to	O
become	O
the	O
second	O
browser	B-Application
after	O
Internet	B-Application
Explorer	I-Application
to	O
correctly	O
support	O
Hebrew	O
and	O
Arabic	O
and	O
languages	O
written	O
right-to-left	O
—	O
before	O
Mozilla	B-Operating_System
had	O
such	O
support	O
.	O
</s>
<s>
KDE	B-Application
2.0	O
was	O
the	O
first	O
KDE	B-Application
release	O
(	O
on	O
October	O
23	O
,	O
2000	O
)	O
to	O
include	O
KHTML	B-Language
(	O
as	O
the	O
rendering	O
engine	O
of	O
the	O
new	O
Konqueror	B-Application
file	B-Application
and	O
web	B-Application
browser	I-Application
,	O
which	O
replaced	O
the	O
monolithic	O
KDE	B-Application
File	B-Application
Manager	I-Application
)	O
.	O
</s>
<s>
KSVG	O
was	O
first	O
developed	O
in	O
2001	O
by	O
Nikolas	O
Zimmermann	O
and	O
Rob	O
Buis	O
;	O
however	O
,	O
by	O
2003	O
,	O
it	O
was	O
decided	O
to	O
fork	B-Application
the	O
then-current	O
KSVG	O
implementation	O
into	O
two	O
new	O
projects	O
:	O
KDOM/KSVG2	O
(	O
to	O
improve	O
the	O
state	O
of	O
DOM	B-General_Concept
rendering	O
in	O
KHTML	B-Language
underneath	O
a	O
more	O
formidable	O
SVG	B-Application
1.0	O
render	O
state	O
)	O
and	O
Kcanvas	O
(	O
to	O
abstract	O
any	O
rendering	O
done	O
within	O
khtml/ksvg2	O
in	O
a	O
single	O
shared	O
library	O
,	O
with	O
multiple	O
backends	O
for	O
it	O
,	O
e.g.	O
,	O
Cairo/Qt	O
,	O
etc	O
.	O
</s>
<s>
KSVG2	O
is	O
also	O
a	O
part	O
of	O
WebKit	B-Language
.	O
</s>
<s>
KHTML	B-Language
is	O
set	O
to	O
be	O
removed	O
in	O
KDE	B-Language
Frameworks	I-Language
6	O
.	O
</s>
<s>
It	O
has	O
not	O
had	O
active	O
development	O
since	O
2016	O
,	O
just	O
the	O
necessary	O
maintenance	O
to	O
work	O
with	O
updates	O
to	O
Frameworks	B-Language
5	I-Language
.	O
</s>
<s>
The	O
following	O
standards	O
are	O
supported	O
by	O
the	O
KHTML	B-Language
engine	O
:	O
</s>
<s>
KHTML	B-Language
and	O
KJS	B-Language
were	O
adopted	O
by	O
Apple	O
in	O
2002	O
for	O
use	O
in	O
the	O
Safari	B-Application
web	I-Application
browser	I-Application
.	O
</s>
<s>
Apple	O
publishes	O
the	O
source	O
code	O
for	O
their	O
fork	B-Application
of	O
the	O
KHTML	B-Language
engine	O
,	O
called	O
WebKit	B-Language
.	O
</s>
<s>
In	O
2013	O
,	O
Google	B-Application
began	O
development	O
on	O
a	O
fork	B-Application
of	O
WebKit	B-Language
,	O
called	O
Blink	B-Language
.	O
</s>
