Project News

v11.12.0 - Summer, hot and rainy.

·joshgoebeljoshgoebel

Parser Engine:

  • fix(parser) count named capture groups when rewriting backreferences spokodev

New Grammars:

  • add FreeDesktop config file (.desktop / systemd) grammar gg582
  • added 3rd party Cedar grammar to SUPPORTED_LANGUAGES Dhruv Maniya
  • added 3rd party DAX and M (Power Query) grammars to SUPPORTED_LANGUAGES jiaopengzi
  • added 3rd party Djot grammar to SUPPORTED_LANGUAGES Mark Scherer
  • added 3rd party Igor Pro grammar to SUPPORTED_LANGUAGES Ryne Andal
  • added 3rd party Jaiva grammar to SUPPORTED_LANGUAGES Lehlogonolo Poole
  • added 3rd party Liquidsoap grammar to SUPPORTED_LANGUAGES Romain Beauxis
  • added 3rd party MoonBit grammar to SUPPORTED_LANGUAGES Kaida-Amethyst
  • added 3rd party Pkl grammar to SUPPORTED_LANGUAGES Dan Chao
  • added 3rd party RAScript grammar to SUPPORTED_LANGUAGES Joshua Raphael
  • added 3rd party Veryl grammar to SUPPORTED_LANGUAGES Naoya Hatta
  • added 3rd party Why3 grammar to SUPPORTED_LANGUAGES JGalego
  • added 3rd party Xojo grammar to SUPPORTED_LANGUAGES patricksalo
  • referenced existing 3rd party ES|QL grammar in SUPPORTED_LANGUAGES Styx0x6

Core Grammars:

  • fix(c) only match real atomic_* type names, not C11 atomic functions, issue #3837 Mark Xian
  • fix(c, cpp) bound the run of type tokens in front of a function name (ReDoS), issue #4362 Jayesh Bhade
  • fix(c, cpp) scope angle-bracket header string to #include, issue #3505 Pablo
  • fix(c, cpp) stop a raw string's closing delimiter from swallowing quotes, issue #3585 David Pavlovschii
  • enh(cmake) add block and endblock keywords Anonymous Maarten
  • fix(cmake) only highlight standalone numbers, not digits that begin an identifier (e.g. 3rdparty), issue #4170 Mark Xian
  • fix(cpp) require a word boundary before numeric literals so digits inside identifiers aren't highlighted as numbers, issue #4231 Mark Xian
  • fix(crystal) stop treating integer division // as a regex literal Zain Asif
  • enh(csharp) support digit separators in binary literals and numeric type suffixes, and stop highlighting the leading _ of an identifier, issue #4258 Sarath Francis
  • enh(css) add corner-shape properties Hama Tanveer
  • enh(css) support six-digit unicode-range values Konstantin Baltsat
  • enh(dart) add highlighting for class and function names guuido
  • enh(dns) highlight registered CAA property tags, issue #4475 Joey Huang
  • enh(dns) improve grammar: character strings, TXT, classes, escapes, addresses Checconio
  • enh(dos) add batch as an alias, issue #4395 Hashim Khan
  • enh(gherkin) update keyword list Hirse
  • enh(gherkin) variables can't contain whitespace Hirse
  • enh(gherkin) docstrings can use backticks Hirse
  • enh(go) recognize binary integer literals spokodev
  • enh(groovy) support underscores in numeric literals greymoth
  • fix(haskell) highlight where in GADT and closed type-family declarations, issue #3753 Konstantin Baltsat
  • enh(java) improve detection of types, including generic and array types Hannes Wallnoefer
  • enh(javascript) add self to built-in variables Dsaquel
  • enh(kotlin) add ktm and ktx aliases DarkMatter-999
  • fix(leaf) fix bug in Leaf keyword highlighting Francesco Paolo Severino
  • fix(lisp) preserve highlighting after quoted multiplication expressions arturict
  • enh(llvm) support block C-style comments utam-1
  • enh(lua) add Lua 5.5 global keyword Nibiri
  • fix(markdown) don't treat a *** or ___ thematic break as the start of bold text, issue #3719 Mayank Gupta
  • enh(nsis) enhance NSIS rules Jan T. Sott
  • enh(python) add missing builtins: aiter and anext (3.10), frozendict and sentinel (3.15) Hugo van Kemenade
  • enh(python) correctly highlight lazy import syntax from PEP 810 Peter Bierma
  • enh(python) support t-strings Nicolas Le Cam
  • fix(ruby) don't treat the scope resolution operator :: as a symbol, issue #4294 Hashim Khan
  • enh(rust) add safe keyword Frances Wingerter
  • enh(rust) include the raw borrow operator in keywords Shiva Kiran Koninty
  • enh(rust) parse f16 and f128 literals usamoi
  • fix(rust) allow function invocations whose names start with a keyword Xia Li-yao
  • fix(rust) recognize \\ and \" char-literal escapes so highlighting doesn't leak, issue #4351 Sarath Francis
  • enh(shell) match period (.) as part of shell prompt Ian Wienand
  • enh(sqf) update to Arma 3 v2.22 LouMontana
  • fix(xml) remove recursive sublanguage references to prevent ReDoS petejm

Documentation:

  • docs(php) explain the difference between php and php-template Zain Asif
  • document LLVM IR in SUPPORTED_LANGUAGES Jan Schultke
  • document the existing pwsh alias for PowerShell helpimnotdrowning
  • list languages with category "common" in SUPPORTED_LANGUAGES Marc Bernard
  • remind contributors to run npm i Proliecan
  • fix typos in README.CDN.md Zitrone

Themes:

Build / Tooling:

  • (build) allow third-party packages to override default languages Lysxia
  • (build) use Trusted Publishers in the publishing pipeline allejo
  • fix(types) allow RegExp in Mode.keywords KJyang-0114
  • refactor(tools) replace @colors/colors with ansis webdiscus
  • chore: dependency updates

CONTRIBUTORS

v11.11.2 - This Summer's Hottest Release

·allejoallejo

Happy belated Summer Solstice to all who celebrate. This is a maintenance release that includes all of the merged PRs through July 2025 (last year).

[!NOTE]

As you may have noticed, highlight.js has been inactive since last summer, through no one's fault; maintaining open source projects is time-consuming. I'll be doing my best to keep the lights on around here, but I'll need the community's help. If you are interested in helping review pull requests, contributing, or even becoming a maintainer, speak up in https://github.com/highlightjs/highlight.js/issues/1678.

[!IMPORTANT]

The 11.11.2 Git tag was published on June 22, 2026, and the npm package was published on August 11, 2026. For any cautious onlookers, nothing malicious has happened. In December 2025, npm revoked all classic tokens for improved security. Since we haven't had a release since July 2025, I didn't notice that our release pipeline was broken because it uses a now-revoked token. Pull request #4427 was opened to fix our release pipeline, and it took some time to get things right. Version 11.11.2 was published to npm after the PR was merged and we had a successful run of the new release workflow.

If you see two 11.11.2 releases on your GitHub feed circa June 2026, this was an accident by a maintainer. A 11.11.2 tag was created prematurely on GitHub and caused a run failure during the release pipeline since all work to bump the release had not been completed. There was no version 11.11.2 that was accidentally published to npm or the CDNs; therefore, the Git tag has been recreated to point to f273f007f85e2096de41c42bf40b870dcb5a5a05.

Parser Engine:

  • fix illegal handling at end of input code Josh Goebel

New Grammars:

  • added 3rd party Aiken grammar to SUPPORTED_LANGUAGES Josh Marchand
  • added 3rd party VoltScript grammar to SUPPORTED_LANGUAGES Chester Moses
  • added 3rd party Gleam grammar to SUPPORTED_LANGUAGES Filip Hoffmann
  • added 3rd party Magik grammar to SUPPORTED_LANGUAGES Sebastiaan Speck
  • added 3rd party Prisma grammar to SUPPORTED_LANGUAGES SungHyun Kim
  • added 3rd party Bicep grammar to SUPPORTED_LANGUAGES Anthony Martin
  • added 3rd party L4 grammar to SUPPORTED_LANGUAGES Thomas Gorissen
  • added 3rd party Abc Notation grammar to SUPPORTED_LANGUAGES NriotHrreion

Core Grammars:

  • fix(cpp) exclude keywords from function calls Eisenwave
  • enh(csp) add missing directives / keywords from MDN (7 more) Max Liashuk
  • enh(ada) add new parallel keyword, allow [] for Ada 2022 Max Reznik
  • fix(javascript) correctly highlight 'for await' again [wolfgang42][]
  • fix(diff) fix unified diff hunk header regex to allow unpaired numbers Chris Wilson
  • enh(php) support single line and hash comments in attributes, constructor and functions Antoine Musso
  • fix(ex) adds support for ?' char literal and missing defguardp keyword Kevin Bloch
  • enh(json) add json5 support Kerry Shetline
  • fix(csharp) Support digit separators te-ing
  • fix(css) unicode-range parsing, issue #4253 Kerry Shetline

Documentation:

Themes:

  • Fix: cybertopia themes render correctly in shadow DOM hbgl
  • added "vs Dark " theme Twineee1

CONTRIBUTORS

v11.11.1 - Merry Christmas!

·joshgoebeljoshgoebel

Version 11.11.1

  • Fixes regressions with Rust grammar in 11.11.0 release.

v11.11.0 - Happy Holidays

·joshgoebeljoshgoebel

Version 11.11.0

CAVEATS / POTENTIALLY BREAKING CHANGES

  • Nothing.

Core Grammars:

  • fix(rust) - adds emoji support in single quote strings [joshgoebel][]
  • fix(apache) - support line continuation via \ Josh Goebel
  • fix(makefile) - allow strings inside $() expressions aneesh98
  • enh(arcade) updated to ArcGIS Arcade version 1.29 Kristian Ekenes
  • enh(css) add all properties listed on MDN (96 additions including anchor-name, aspect-ratio, backdrop-filter, container, margin-trim, place-content, scroll-timeline, ...) BaliBalo
  • enh(excel) add built-in functions for Excel 365 release to 2024 Danny Winrow
  • enh(erlang) OTP 27 triple-quoted strings nixxquality
  • enh(erlang) OTP 27 doc attribute nixxquality
  • enh(erlang) OTP 27 Sigil type nixxquality
  • enh(erlang) OTP25/27 maybe statement nixxquality
  • enh(dart) Support digit-separators in number literals [Sam Rawlins][]
  • enh(csharp) add Contextual keywords file, args, dynamic, record, required and scoped Alvin Joy
  • enh(lua) add 'pluto' as an alias Sainan
  • enh(bash) add reserved keywords time and coproc Álvaro Mondéjar
  • enh(nix) update keywords [h7x4][]
  • enh(nix) support paths [h7x4][]
  • enh(nix) support lookup paths [h7x4][]
  • enh(nix) support operators [h7x4][]
  • enh(nix) support REPL keywords [h7x4][]
  • enh(nix) support markdown comments [h7x4][]
  • enh(nix) support basic function params [h7x4][]
  • enh(nix) better parsing of attrsets [h7x4][]
  • fix(c) - Fixed hex numbers with decimals Dxuian
  • fix(typescript) - Fixedoptional property not highlighted correctly Dxuian
  • fix(ruby) - fix |= operator false positives (as block arguments) Aboobacker MK
  • enh(gcode) rewrote language for modern gcode support Barthélémy Bonhomme
  • fix(sql) - Fixed sql primary key and foreign key spacing issue Dxuian
  • fix(cpp) added flat_set and flat_map as a part of cpp 23 version Lavan
  • fix(yaml) - Fixed special chars in yaml Dxuian
  • fix(basic) - Fixed closing quotation marks not required for a PRINT statement Somya
  • fix(nix) remove add builtin [h7x4][]
  • fix(nix) mark or as builtin instead of literal [h7x4][]
  • fix(nix) handle ''' string escapes [h7x4][]
  • fix(nix) handle backslash string escapes [h7x4][]
  • fix(nix) don't mix escapes for " and '' strings [h7x4][]
  • fix(swift) - Fixed syntax highlighting for class func/var declarations guuido
  • fix(yaml) - Fixed wrong escaping behavior in single quoted strings guuido
  • enh(nim) - Add concept and defer to list of Nim keywords Jake Leahy

New Grammars:

  • added 3rd party TTCN-3 grammar to SUPPORTED_LANGUAGES Osmocom
  • added 3rd party Odin grammar to SUPPORTED_LANGUAGES clsource
  • added 3rd party Liquid grammar to SUPPORTED_LANGUAGES Laurel King

Developer Tools:

  • Nothing yet.

Themes:

Improvements:

  • Resolve the memory leak problem when creating multiple Highlight.js instances Imken

CONTRIBUTORS

11.10.0 - Welcome to the 2024 Mega-smorgisbord update.

·joshgoebeljoshgoebel

Sorry for the wait, this one is a doozie, thanks to all the contributors who made it possible!

CAVEATS / POTENTIALLY BREAKING CHANGES

[!IMPORTANT] This version drops support for Node 16.x, which is no longer supported by Node.js.

Core Grammars:

  • enh(typescript) add support for satisfies operator Kisaragi Hiu
  • enc(c) added more C23 keywords Melkor-1
  • enh(json) added jsonc as an alias BackupMiles
  • enh(gml) updated to latest language version (GML v2024.2) gnysek
  • enh(c) added more C23 keywords and preprcoessor directives Eisenwave
  • enh(js/ts) support namespaced tagged template strings Aral Balkan
  • enh(perl) fix false-positive variable match at end of string Josh Goebel
  • fix(cpp) not all kinds of number literals are highlighted correctly Lê Duy Quang
  • fix(css) fix overly greedy pseudo class matching Bradley Mackey
  • enh(arcade) updated to ArcGIS Arcade version 1.24 Kristian Ekenes
  • fix(typescript): params types Mohamed Ali
  • fix(rust) fix escaped double quotes in string Mohamed Ali
  • fix(rust) fix for r# raw identifier not being highlighted correctly. JaeBaek Lee
  • enh(rust) Adding union to be recognized as a keyword in Rust. JaeBaek Lee
  • fix(yaml) fix for yaml with keys having brackets highlighted incorrectly Aneesh Kulkarni
  • fix(csharp) add raw string highlighting for C# 11. Tara
  • fix(bash) fix # within token being detected as the start of a comment Felix Uhl
  • fix(python) fix or conflicts with string highlighting Mohamed Ali
  • enh(python) adds a scope to the self variable [Lee Falin][]
  • enh(delphi) allow digits to be omitted for hex and binary literals Jonah Jeleniewski
  • enh(delphi) add support for digit separators Jonah Jeleniewski
  • enh(delphi) add support for character strings with non-decimal numerics Jonah Jeleniewski
  • fix(javascript) incorrect function name highlighting CY Fung
  • fix(1c) fix escaped symbols "+-;():=,[]" literals Vitaly Barilko
  • fix(swift) correctly highlight generics and conformances in type definitions Bradley Mackey
  • enh(swift) add package keyword Bradley Mackey
  • fix(swift) ensure keyword attributes highlight correctly Bradley Mackey
  • fix(types) fix interface LanguageDetail > keywords Patrick Chiu
  • enh(java) add goto to be recognized as a keyword in Java Alvin Joy
  • enh(bash) add keyword sudo Alvin Joy
  • fix(haxe) captures new keyword without capturing it within variables/class names Cameron Taylor
  • fix(go) fix go number literals to accept _ separators, add hex p exponents Lisa Ugray
  • enh(markdown) add entity support David Schach TaraLei
  • enh(css) add justify-items and justify-self attributes Vasily Polovnyov
  • enh(css) add accent-color, appearance, color-scheme, rotate, scale and translate attributes Carl Räfting
  • fix(fortran) fixes parsing of keywords delimited by dots Julien Bloino
  • enh(css) add select, option, optgroup, picture and source to list of known tags Vasily Polovnyov
  • enh(css) add inset, inset-*, border-start-*-radius and border-end-*-radius attributes Vasily Polovnyov
  • enh(css) add text-decoration-skip-ink, text-decoration-thickness and text-underline-offset attributes Vasily Polovnyov

New Grammars:

  • added 3rd party CODEOWNERS grammar to SUPPORTED_LANGUAGES nataliia-radina
  • added 3rd party Luau grammar to SUPPORTED_LANGUAGES Robloxian Demo
  • added 3rd party ReScript grammar to SUPPORTED_LANGUAGES Paul Tsnobiladzé
  • added 3rd party Zig grammar to SUPPORTED_LANGUAGES [Hyou BunKen][]
  • added 3rd party WGSL grammar to SUPPORTED_LANGUAGES Arman Uguray
  • added 3rd party Unison grammar to SUPPORTED_LANGUAGES Rúnar Bjarnason
  • added 3rd party Phix grammar to SUPPORTED_LANGUAGES PeteLomax
  • added 3rd party Mirth grammar to SUPPORTED_LANGUAGES Sierra
  • added 3rd party JSONata grammar to SUPPORTED_LANGUAGES Vlad Dimov

Developer Tool:

Themes:

  • Added 1c-light theme a like in the IDE 1C:Enterprise 8 (for 1c) Vitaly Barilko

New Website

·allejoallejo

Our previous website was created by Ivan Sagalaev, the original creator of highlight.js. Our old website served us well for years but due to age, became dated and hard to maintain. So, it's my pleasure to introduce our brand-new website powered by Next.js with a few new features that had been requested over the years. Our hope is, that with a more modern website, we'll be able to better maintain it and welcome more contributions from the community.

Demo Page

Whenever you're navigating the internet for libraries to use in your project, you look for demos of how said libraries behave. But what about highlight.js? Where's the demo section where you can put code snippets and test out the highlighting behavior and our plethora of themes?

Say no more, introducing our new demo page where you can test code snippets and preview themes! But wait, there's more!

You can share the code snippets you write on our demo page! We're not storing these code snippets in any databases. It's all stored in the URL. So be mindful of sharing extremely large code snippets.

Download Page

We've heard you! You want to be able to save your download configurations and have us bundle your package for you. Our download page now also supports specifying your languages and persisting them in the URL. Revisit the URL after a few weeks and if there's been any updates to the grammars you included, you'll automatically download the new bundle. 🎉

Open Source

Of course, our new website is open source and welcomes contributions! Just like the main highlight.js repo, create an issue to request features or discuss implementations of features if you'd like to contribute.

More to Come

Now that our website has been modernized, we look forward to a pleasant style with more regular updates and features added.

Thank you for highlighting with highlight.js!