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Rescuing 1 sources and tagging 0 as dead.) #IABot (v2.0.9.5) (Tomkozak61 - 26997

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{{Short description|Open source browser engine}}
{{Infobox Software
| name = KHTML
| logo =
| screenshot = Konqueror web browser screenshot of nl wikipedia.png
| caption = [[Konqueror]] using KHTML to render the Dutch [[Wikipedia]] front page in 2009
| developer = [[KDE]]
| discontinued = yes
| programming language = [[C++]]<ref>{{cite web |url=https://invent.kde.org/frameworks/khtml/-/graphs/master/charts| title=KHTML repository analytics|website=invent.kde.org|access-date=2020-08-15}}</ref>
| operating system = 
| genre = [[Browser engine]]
| repo = {{URL|https://invent.kde.org/frameworks/khtml}}
| license = [[GNU Lesser General Public License]]
| website =
}}

'''KHTML''' is a discontinued<ref name="discontinued"/> [[browser engine]] that was developed by the [[KDE]] project. It originated as the engine of the [[Konqueror]] browser in the late 1990s, but active development ceased in 2016.<ref name="git_log"/><ref name="kde 6"/> It was officially discontinued in 2023.<ref name="discontinued">{{cite web |title=KHTML repository |quote=Removed for KF6, the 'kf5' branch contains the last maintained state. |url=https://github.com/KDE/khtml/tree/6d89b39ddb93aa5b655508c0b5295f3f4db626b8 |website=GitHub |access-date=5 May 2023}}</ref>

Built on the [[KParts]] framework and written in [[C++]], KHTML had relatively good [[KHTML#Standards compliance|support for Web standards]] during its prime. Engines forked from KHTML are used by most of the browsers that are widely used today, including [[WebKit]] ([[Safari (web browser)|Safari]]) and [[Blink (browser engine)|Blink]] ([[Google Chrome]], [[Chromium (web browser)|Chromium]], [[Microsoft Edge]], [[Opera (web browser)|Opera]], [[Vivaldi (web browser)|Vivaldi]], [[Opera GX]], [[Opera Mini]], [[Opera Mobile]], [[Yandex Browser]], [[Orion Browser|Orion]], [[Arc (web browser)|Arc]] (On [[iOS]]), [[GNOME Web|Epiphany]], [[Midori (web browser)|Midori]], [[Konqueror]], [[Otter Browser]], [[Dooble]], [[Epic (web browser)|Epic Privacy Browser]], [[SlimBrowser|Slimjet]], [[Comodo Dragon]], [[SRWare Iron]], [[Cốc Cốc]], [[Torch (web browser)|Torch Browser]], [[Orbitum (Web Browser)|Orbitum]], [[UC Browser]], [[Kiwi Browser]], [[Samsung Internet]], [[Bromite (Web Browser)|Bromite]], Blisk, [[Colibri Browser]], Min Browser, [[Ungoogled-chromium|Ungoogled Chromium]], [[Iridium Browser]], [[Avast Secure Browser]], [[Avast Secure Browser|AVG Secure Browser]] and [[Brave (web browser)|Brave]]).

==History==
===Origins===
KHTML was preceded by an earlier engine called ''khtmlw'' or ''the KDE HTML Widget'', developed by Torben Weis and Martin Jones,<ref name="auto">{{cite web |url=https://www.youtube.com/watch?v=Tldf1rT0Rn0 |title=Lars Knoll and George Staikos: From KDE to WebKit |date=26 August 2011 |publisher=[[YouTube]] |access-date=1 September 2019}}</ref><ref>{{cite web |url=https://github.com/KDE/kde1-kdelibs |title=KDE/kde1-kdelibs/khtmlw |website=GitHub |language=en |access-date=2020-01-23}}</ref> which implemented support for [[HTML]] 3.2, [[HTTP]] 1.0, and [[Frame (World Wide Web)|HTML frames]], but not the [[Document Object Model|DOM]], [[Cascading Style Sheets|CSS]], or [[JavaScript]].

KHTML itself came into existence on November 4, 1998,<ref name="auto"/> as a [[fork (software development)|fork]] of the khtmlw library, with some slight refactoring and the addition of [[Unicode]] support and changes to support the move to [[Qt (software)|Qt]] 2. Waldo Bastian<ref>{{cite web |url=https://behindkde.org/node/37/ |title=Waldo Bastian | Behind KDE |website=Behindkde.org |access-date=1 September 2019 |archive-date=11 April 2023 |archive-url=https://web.archive.org/web/20230411095409/https://behindkde.org/node/37/ |url-status=dead }}</ref> was among those who did the work of creating that early version of KHTML.<ref name="auto"/>

===Re-write and improvement===
The real work on KHTML actually started between May and October 1999, with the realization that the choice facing the project was "either do a significant effort to move KHTML forward or to use [[Mozilla]]"<ref name="auto"/> and with adding support for [[JavaScript]] as the highest priority. So in May 1999, Lars Knoll<ref>{{cite web |url=https://behindkde.org/node/145/ |title=Lars Knoll | Behind KDE |website=Behindkde.org |access-date=1 September 2019 |archive-date=1 September 2019 |archive-url=https://web.archive.org/web/20190901123411/https://behindkde.org/node/145/ |url-status=dead }}</ref> began doing research with an eye toward implementing the [[Document Object Model|DOM]] specification, finally announcing<ref>{{cite web |url=https://marc.info/?l=kfm-devel&m=93489518402924 |title='changes in KHTML' - MARC |website=Marc.info |access-date=1 September 2019}}</ref> on August 16, 1999 that he had checked in<ref>{{cite web |url=https://marc.info/?l=kde-commits&m=93476738632582 |title='khtml_to_dom: kdelibs/khtml' - MARC |website=Marc.info |access-date=1 September 2019}}</ref> what amounted to a complete rewrite of the KHTML library—changing KHTML to use the standard [[Document Object Model|DOM]] as its internal document representation. That in turn allowed the beginnings of [[JavaScript]] support to be added in October 1999,<ref name="auto"/> followed shortly afterwards with the integration of [[KJS (JavaScript engine)|KJS]] by [[Harri Porten]].

In the closing months of 1999 and first few months of 2000, Knoll did further work with Antti Koivisto and Dirk Mueller<ref name="auto"/><ref>{{cite web |url=http://trac.webkit.org/projects/webkit/wiki/WebKit%20Team#AnttiKoivistoanttikreview |title=WebKit Team – WebKit |website=Trac.webkit.org |access-date=1 September 2019}}</ref><ref>{{cite web |url=https://behindkde.org/node/211/ |title=Dirk Mueller | Behind KDE |website=Behindkde.org |access-date=1 September 2019 |archive-date=1 September 2019 |archive-url=https://web.archive.org/web/20190901124926/https://behindkde.org/node/211/ |url-status=dead }}</ref> to add CSS support and to refine and stabilize the KHTML architecture,<ref name="auto"/> with most of that work being completed by March 2000. Among other things, those changes enabled KHTML to become the second browser after [[Internet Explorer]] to correctly support [[Hebrew]] and [[Arabic]] and languages written [[Bi-directional text|right-to-left]]<ref name="auto"/>—before [[Mozilla]] had such support.

[[KDE 2.0]] was the first KDE release (on October 23, 2000) to include KHTML<ref>{{cite web |url=https://www.youtube.com/watch?v=Tldf1rT0Rn0 |title=Lars Knoll and George Staikos: From KDE to WebKit |date=26 August 2011 |publisher=[[YouTube]] |access-date=1 September 2019}}</ref> (as the rendering engine of the new [[Konqueror]] [[file manager|file]] and [[web browser]], which replaced the monolithic KDE File Manager).

===Other modules===
KSVG was first developed in 2001 by Nikolas Zimmermann and Rob Buis; however, by 2003, it was decided to fork the then-current KSVG implementation into two new projects: [[KDOM (module)|KDOM]]/KSVG2 (to improve the state of DOM rendering in KHTML underneath a more formidable SVG 1.0 render state) and Kcanvas (to abstract any rendering done within khtml/ksvg2 in a single shared library, with multiple backends for it, e.g., Cairo/Qt, etc.).<ref>{{Cite web |url=http://mlblog.osdir.com/kde.devel.ksvg/2005-01/msg00004.shtml |title=Archived copy |access-date=2008-11-17 |archive-date=2016-03-03 |archive-url=https://web.archive.org/web/20160303201803/http://mlblog.osdir.com/kde.devel.ksvg/2005-01/msg00004.shtml |url-status=dead }}</ref>

KSVG2 is also a part of [[WebKit]].<ref>{{cite web|url=http://webkit.org/projects/svg/|title=The WebKit Open Source Project|website=Webkit.org|date=7 November 2015 |access-date=1 September 2019}}</ref>

===Sunsetting===
KHTML was scheduled to be removed in [[KDE Frameworks]] 6.<ref name="kde 6">{{cite web |url=https://phabricator.kde.org/T11543| title=Port Konqueror away from KHTML|website=phabricator.kde.org|access-date=2023-05-05}}</ref> Active development ended in 2016, just the necessary maintenance to work with updates to Frameworks 5.<ref name="git_log"/> It was officially discontinued in 2023.<ref name="discontinued"/>

==Standards compliance==
The following standards are supported by the KHTML engine:
{{Div col|colwidth=25em}}
* [[HTML]] 4.01
* [[HTML5|HTML 5]] support
* [[Cascading Style Sheets|CSS]] 1
* [[Cascading Style Sheets|CSS]] 2.1 (screen and paged media)
* [[Cascading Style Sheets|CSS]] 3 Selectors (fully as of KDE 3.5.6<ref>{{cite web|url=http://www.kde.org/announcements/changelogs/changelog3_5_5to3_5_6.php|title=KDE 3.5.6 Changelog|publisher=K Desktop Environment}}</ref>)
* [[Cascading Style Sheets|CSS]] 3 Other (multiple backgrounds, box-sizing and text-shadow)
* [[Portable Network Graphics|PNG]], [[Multiple-image Network Graphics|MNG]], [[JPEG]], [[Graphics Interchange Format|GIF]] graphic formats
* [[Document Object Model|DOM]] 1, 2 and partially 3
* [[JavaScript|ECMA-262/JavaScript 1.5]]
* Partial [[Scalable Vector Graphics]] support
{{div col end}}

==Descendants==
{{Main|WebKit#Origins}}
KHTML and [[KJS (software)|KJS]] were adopted by [[Apple Inc.|Apple]] in 2002 for use in the [[Safari (web browser)|Safari]] web browser. Apple publishes the source code for their [[Fork (software development)|fork]] of the KHTML engine, called [[WebKit]]. In 2013, [[Google]] began development on a fork of WebKit, called [[Blink (browser engine)|Blink]],<ref>{{cite web|url=https://blog.chromium.org/2013/04/blink-rendering-engine-for-chromium.html|title=Blink: A rendering engine for the Chromium project|website=Blog.chromium.org|access-date=1 September 2019}}</ref> which is now widely used in browsers such as [[Google Chrome]], [[Microsoft Edge]], [[Opera (web browser)|Opera]], [[Brave (web browser)|Brave]] and more.<ref>{{Cite web |title=What is Blink? {{!}} Web Platform |url=https://developer.chrome.com/docs/web-platform/blink |access-date=2025-10-13 |website=Chrome for Developers |language=en}}</ref>

==See also==
{{Portal|Free and open-source software}}
* {{section link|List of web browsers|KHTML-based}}
* [[Comparison of browser engines]]

==References==
{{Reflist|2}}

==External links==
* [https://apps.kde.org/konqueror/ Web Browser] – the Konqueror website
* [https://techbase.kde.org/Development/Architecture/KDE3/KHTML KHTML – KDE's HTML library] – description at developer.kde.org
* [https://invent.kde.org/frameworks/khtml KHTML at the KDE git repository]
* [https://www.youtube.com/watch?v=Tldf1rT0Rn0 From KDE to WebKit: The Open Source Engine That's Here to Stay] – presentation at Yahoo! office by Lars Knoll and George Staikos on December 8, 2006 (video)

{{Browser engines}}
{{KDE}}

[[Category:1999 software]]
[[Category:Free layout engines]]
[[Category:Free software programmed in C++]]
[[Category:KDE Frameworks]]
[[Category:KDE Platform]]

KHTML - Revision history

imported>InternetArchiveBot: Rescuing 1 sources and tagging 0 as dead.) #IABot (v2.0.9.5) (Tomkozak61 - 26997