PrismJS/prism

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Lightweight, robust, elegant syntax highlighting.

Stars: 13k
Forks: 1.4k
Open beginner issues: 1
Indexed issues: 395
Avg merge: 15h 36m
Merged PRs (30d): 3

Dominant language: JavaScript
License: MIT
Last GitHub push: Sep 15, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue help wanted

Beginner friendly Everything

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395 open issues indexed

Removing $placeholder changes how an unquoted template attribute value, attribute name, or tag name parses (13 languages) Open

Difficulty 5/5 Over a week Newbie friendliness 28/100

PrismJS/prism#4119 · Opened Sep 17, 2026
An unchanged diff line takes only the last selector reading, so a construct spanning into a deleted line renders half-highlighted Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

PrismJS/prism#4118 · Opened Sep 17, 2026
diff:<lang> glues hunks and files together, so one unterminated construct contaminates the rest Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

PrismJS/prism#4117 · Opened Sep 17, 2026
Use the token overlay helper for the remaining structure-merging code Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

PrismJS/prism#4111 · 1 comment · Opened Sep 15, 2026
Changed lines in `diff:<lang>` blocks are visually unmarked Open

bug themes

Difficulty 4/5 3-5 days Newbie friendliness 68/100

PrismJS/prism#4109 · Opened Sep 15, 2026
Swift class regex doesn't support private names (ex. '_Foo') Open

Difficulty 1/5 Under an hour Newbie friendliness 88/100

PrismJS/prism#4100 · Opened Aug 21, 2026
New Language: CakePHP Open

language-definitions new language

Difficulty 3/5 1-2 days Newbie friendliness 55/100

PrismJS/prism#4099 · Opened Aug 16, 2026
E Open

Difficulty 5/5 Over a week Newbie friendliness 10/100

PrismJS/prism#4097 · Opened Jul 31, 2026
SCSS/LESS selector, property, and atrule patterns have O(n^2) polynomial backtracking (masked by a suppressed scslre Move report) Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PrismJS/prism#4092 · 1 reaction · Opened Jul 1, 2026
Add support for Mozilla's Project Fluent localization syntax Open

language-definitions new language

Difficulty 3/5 1-2 days Newbie friendliness 55/100

PrismJS/prism#4089 · 1 comment · Opened Jun 24, 2026
Language components can fail in Vite/Rolldown production builds because Prism is a free global Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

PrismJS/prism#4088 · 1 reaction · Opened Jun 19, 2026
Throw Error when the language is core Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

PrismJS/prism#4085 · Opened Jun 3, 2026
`wiki` renders nested template tags incorrectly/inconsistently Open

language-definitions

Difficulty 3/5 1-2 days Newbie friendliness 65/100

PrismJS/prism#4074 · Opened Apr 9, 2026
F5 Network iRule Language Definition Open

language-definitions new language

Difficulty 3/5 1-2 days Newbie friendliness 52/100

PrismJS/prism#4061 · Opened Mar 3, 2026
Ink Open

language-definitions new language

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PrismJS/prism#4059 · Opened Feb 14, 2026
New Language Request: Typst Open

language-definitions new language

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PrismJS/prism#4055 · 3 reactions · Opened Jan 17, 2026
shell-session: support for PS2 and multi-line command continuation Open

language-definitions

Difficulty 3/5 1-2 days Newbie friendliness 50/100

PrismJS/prism#4054 · Opened Jan 13, 2026
German deskription Open

language-definitions new language

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

PrismJS/prism#4052 · Opened Dec 25, 2025
Support for Vento (.vto) Open

language-definitions new language

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PrismJS/prism#4050 · Opened Dec 18, 2025
Correctly highlight the behind glyph ⍛ Open

language-definitions

Difficulty 2/5 1-3 hours Newbie friendliness 52/100

PrismJS/prism#4043 · Opened Nov 26, 2025
Support code-folding for large code blocks / multi-file code snippets Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

PrismJS/prism#4042 · Opened Nov 26, 2025
Multiline R strings are not correctly highlighted Open

language-definitions

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PrismJS/prism#4040 · Opened Nov 25, 2025
Documentation of Unescaped Markup plugin contains duplicated sections Open

Difficulty 1/5 Under an hour Newbie friendliness 88/100

PrismJS/prism#4038 · 1 comment · Opened Nov 24, 2025
KDL support Open

language-definitions new language

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PrismJS/prism#4036 · Opened Nov 23, 2025
RISC-V Assembly Open

language-definitions new language

Difficulty 3/5 1-2 days Newbie friendliness 38/100

PrismJS/prism#4034 · 1 comment · Opened Nov 21, 2025
request for language options Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 1/100

PrismJS/prism#4026 · Opened Oct 31, 2025
Support for phpBB MOD Text Template Open

language-definitions new language

Difficulty 3/5 1-2 days Newbie friendliness 48/100

PrismJS/prism#4014 · Opened Oct 4, 2025
Support for .bat/.cmd scripts Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PrismJS/prism#4006 · Opened Aug 26, 2025
Support for Metal Shading Language (MSL/Metal) Open

language-definitions new language

Difficulty 3/5 1-2 days Newbie friendliness 35/100

PrismJS/prism#4003 · 1 comment · Opened Aug 14, 2025
Support for POV-Ray Open

language-definitions new language

Difficulty 3/5 1-2 days Newbie friendliness 48/100

PrismJS/prism#3997 · Opened Aug 4, 2025
Support for Syntax Mcfunction! Open

language-definitions new language

Difficulty 3/5 1-2 days Newbie friendliness 48/100

PrismJS/prism#3995 · 1 comment · Opened Jul 26, 2025
Support for Syntax Mcfunction! Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 38/100

PrismJS/prism#3994 · Opened Jul 26, 2025
Support for ImpEx Open

language-definitions new language

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PrismJS/prism#3989 · Opened Jul 19, 2025
Support for terraform Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PrismJS/prism#3988 · 2 reactions · Opened Jul 18, 2025
Prism + Line Numbers : Print version will lose line numbers when code listing need to be divided between two pages Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PrismJS/prism#3981 · 1 comment · Opened Jul 10, 2025
from and revert are highlighted as keywords in Solidity code everywhere Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PrismJS/prism#3980 · Opened Jun 30, 2025
Request to add support for Devicetree language Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PrismJS/prism#3969 · Opened Jun 22, 2025
How can I contribute a new language? Open

language-definitions new language

Difficulty 3/5 1-2 days Newbie friendliness 30/100

PrismJS/prism#3967 · 1 reaction · Opened Jun 21, 2025
Light/dark mode support Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 28/100

PrismJS/prism#3938 · 1 comment · 1 reaction · Opened May 15, 2025
Support for DBML (Database Markup Language) Open

language-definitions new language

Difficulty 3/5 1-2 days Newbie friendliness 42/100

PrismJS/prism#3929 · 1 reaction · Opened May 6, 2025
[v2] Language combinations / extensions / embeddings / ... Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

PrismJS/prism#3927 · 6 comments · 1 reaction · Opened May 5, 2025
[v2] Match tokens via named capturing groups Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

PrismJS/prism#3924 · Opened May 1, 2025
[v2] Handle strings in grammars as whole word literals Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PrismJS/prism#3913 · Opened Apr 28, 2025
[v2] `$`-prefix special keys Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

PrismJS/prism#3912 · 1 reaction · Opened Apr 28, 2025
[v2] Simplify hooks Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

PrismJS/prism#3904 · 3 comments · Opened Apr 26, 2025
[v2] Remove `KnownPlugins` data structure Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

PrismJS/prism#3903 · 3 comments · Opened Apr 26, 2025
[v2] Repo + package architecture Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

PrismJS/prism#3901 · 2 comments · Opened Apr 26, 2025
No easy way to build with specific components using npm Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

PrismJS/prism#3900 · 1 comment · Opened Apr 26, 2025
Add support for P4 Language Open

language-definitions new language

Difficulty 3/5 1-2 days Newbie friendliness 45/100

PrismJS/prism#3890 · Opened Apr 14, 2025
AdBlock Pro Filter List Syntax Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 48/100

PrismJS/prism#3883 · Opened Mar 31, 2025

PrismJS/prism

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