less/less.js

Less. The dynamic stylesheet language.

Stars: 17k
Forks: 3.4k
Open beginner issues: 0
Indexed issues: 175
Avg merge: 7h 42m
Merged PRs (30d): 26

Dominant language: JavaScript
License: Apache-2.0
Last GitHub push: Sep 2, 2026
Latest indexed: Sep 18, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue

Beginner friendly Everything

Open All

175 open issues indexed

Extend within container query Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 64/100

less/less.js#4540 · 1 reaction · Opened Sep 16, 2026
rgb(from … r g b / <alpha>) throws under --math=always (Operation on an invalid type) Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 68/100

less/less.js#4528 · 3 comments · 1 reaction · Opened Sep 8, 2026
page Open

bug needs info

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

less/less.js#4508 · 1 reaction · Opened Aug 15, 2026
Security issues in "image-size" dependency Open

bug

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

less/less.js#4455 · 11 reactions · Opened Jun 17, 2026
LESS if() function collides with CSS if() function Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 52/100

less/less.js#4384 · 17 comments · 1 reaction · Opened Nov 11, 2025
attr() declaration with type function breaks parsing Open

bug

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

less/less.js#4371 · 7 comments · 2 reactions · Opened Oct 13, 2025
Unable to load plugin (yarn pnp issue?) Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 30/100

less/less.js#4367 · 3 comments · 1 reaction · Opened Sep 17, 2025
Parser doesn't error on invalid variable interpolation syntax Open

bug

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

less/less.js#4338 · 4 comments · 1 reaction · Opened Apr 9, 2025
Incorrect wording. Please correct. Open

bug

Difficulty 1/5 Under an hour Newbie friendliness 85/100

less/less.js#4330 · 1 comment · 1 reaction · Opened Mar 24, 2025
Error. Please correct it. Open

bug

Difficulty 1/5 Under an hour Newbie friendliness 50/100

less/less.js#4328 · 2 comments · 1 reaction · Opened Mar 23, 2025
Documentation error. Please fix it. Open

bug

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

less/less.js#4326 · 2 comments · 1 reaction · Opened Mar 20, 2025
[Note] Core contributors needed Open

community & promotion good first issue up-for-grabs

less/less.js#4288 · 8 comments · 1 reaction · 1 assignee · Opened Nov 25, 2024
import styles undefined Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 28/100

less/less.js#4277 · 5 comments · 1 reaction · Opened Aug 24, 2024
Strip empty rulesets that contain only CSS comments Open

bug feature request

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

less/less.js#4276 · 1 comment · 3 reactions · Opened Aug 14, 2024
Lessc to provide preserve comments option Open

bug feature request

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

less/less.js#4269 · 1 comment · 1 reaction · Opened May 3, 2024
Whether the official statement "Selectors with variables will not match" is wrong? Open

bug

less/less.js#4248 · 1 comment · 1 assignee · Opened Nov 30, 2023
Can not find variable when a variable be created in plugin. Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 25/100

less/less.js#4241 · 2 comments · Opened Oct 29, 2023
"Selector Interpolation with Extend" possibly contains outdated info (doc states not supported, but works) Open

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

less/less.js#4228 · 5 comments · Opened Sep 4, 2023
Find less file path match error in npm package Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

less/less.js#4220 · 1 comment · Opened Aug 25, 2023
Multiple scoped imports via (reference) fail Open

bug

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

less/less.js#3813 · 2 comments · Opened Jul 27, 2023
Update `make-dir` to resolve vulnerable dependency Open

bug

less/less.js#3806 · 6 comments · 1 reaction · 1 assignee · Opened Jul 6, 2023
Urdu Translation Open

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

less/less.js#3805 · 1 comment · Opened Jul 2, 2023
[Feature request] CSS Nesting support Open

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

less/less.js#3781 · 4 comments · 7 reactions · Opened Mar 31, 2023
CSS min and max function calls that hold CSS variables fail with "Operation on an invalid type" Open

bug good first issue

Difficulty 4/5 3-5 days Newbie friendliness 35/100

less/less.js#3777 · 23 comments · Opened Feb 8, 2023
"math" option in compilerconfig defaults not working Open

needs info

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

less/less.js#3773 · 6 comments · Opened Jan 16, 2023
Remove PhantomJS stuff Open

good first issue up-for-grabs

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

less/less.js#3772 · 6 comments · Opened Jan 8, 2023
Global Variables with a literal "." in the value causes the variable to be undefined Open

bug

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

less/less.js#3767 · 14 comments · 1 reaction · Opened Dec 13, 2022
Importing less files from a third party library crashes the build. Open

bug

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

less/less.js#3750 · 1 comment · Opened Sep 14, 2022
import styles from the library into the library Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

less/less.js#3749 · 3 comments · Opened Sep 5, 2022
Mixin followed by !important is not correctly compiled Open

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

less/less.js#3747 · 1 comment · Opened Aug 29, 2022
Multiple less files with variable interpolation is not compiling properly Open

bug

less/less.js#3730 · 3 comments · 1 assignee · Opened Jun 14, 2022
less with @import on main thread - Chrome > 101 Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

less/less.js#3727 · 5 comments · Opened May 12, 2022
Custom Plugin (Functions) promise async Open

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

less/less.js#3720 · Opened Apr 27, 2022
Can't use package.json property `imports` to import subpath module. Open

bug feature request good first issue up-for-grabs

Difficulty 4/5 3-5 days Newbie friendliness 38/100

less/less.js#3715 · 5 comments · Opened Apr 20, 2022
Cannot override variable imported via :extend() Open

bug

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

less/less.js#3706 · 2 comments · Opened Mar 29, 2022
[Feat] add a filter() method for the lists Open

feature request low priority

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

less/less.js#3705 · 2 comments · Opened Mar 26, 2022
Variable alias breaks unrelated detached rulesets call Open

needs info question

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

less/less.js#3677 · 3 comments · Opened Dec 22, 2021
LESS detects @apply as variable (ISSUE) Open

bug feature request good first issue up-for-grabs

less/less.js#3675 · 5 comments · 1 assignee · Opened Dec 15, 2021
How to create a LESS variable with a Plugin Open

question support as plugin

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

less/less.js#3659 · 4 comments · Opened Oct 21, 2021
default function Cannot analysis t he Open

needs decision question

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

less/less.js#3648 · Opened Sep 9, 2021
Unexpected extracted variable in second looped ruleset Open

question

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

less/less.js#3647 · 1 reaction · Opened Sep 9, 2021
Out of memory when trying to bundle AdminLTE and Bootstrap Open

research needed

Difficulty 4/5 3-5 days Newbie friendliness 38/100

less/less.js#3627 · 4 comments · Opened Jun 17, 2021
Cannot namespace detached ruleset Open

bug needs decision

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

less/less.js#3624 · 2 comments · Opened Jun 7, 2021
When modifying less files, a memory leak occurs in the packaging Open

needs info

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

less/less.js#3623 · 2 comments · Opened Jun 4, 2021
support pseudo-class function which contains less `Variable` or other edge case Open

bug high priority

less/less.js#3622 · 6 comments · 1 assignee · Opened May 19, 2021
help | how to use(or possibility to) mixin with function? Open

question

Difficulty 3/5 1-2 days Newbie friendliness 25/100

less/less.js#3617 · 1 comment · Opened Apr 16, 2021
RangeError: Maximum call stack size exceeded Open

bug needs decision

Difficulty 4/5 3-5 days Newbie friendliness 35/100

less/less.js#3614 · 5 comments · Opened Apr 12, 2021
support CSS variables in color function Open

needs decision research needed

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

less/less.js#3611 · 6 comments · 1 reaction · Opened Mar 22, 2021
data-uri svg output Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

less/less.js#3610 · 1 comment · Opened Mar 17, 2021
How do I use a variable in less js as a command that appears before a parenthesis? Open

question

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

less/less.js#3606 · Opened Feb 25, 2021

A short digest of beginner-friendly GitHub issues.