w3c/css-houdini-drafts

View on GitHub

Stars: 1.9k
Forks: 149
Open beginner issues: 0
Indexed issues: 268

Dominant language: Bikeshed
License: No license data
Last GitHub push: Aug 6, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

Open All

268 open issues indexed

[css-typed-om] `StylePropertyMap.set()` doesn't define how to handle empty values argument Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

w3c/css-houdini-drafts#1176 · Opened Jun 8, 2026
[css-typed-om] `StylePropertyMap.set()` is inconsistent with how it handles invalid `values` Open

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

w3c/css-houdini-drafts#1175 · Opened Jun 8, 2026
[css-animation-worklet-1] Update examples for AnimationWorklet Open

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

w3c/css-houdini-drafts#1174 · Opened Jun 2, 2026
[meta] ishoudinireadyyet.com is down Open

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

w3c/css-houdini-drafts#1169 · 1 reaction · Opened Mar 4, 2026
[css-typed-om] Add `styleMap` to `CSSNestedDeclarations` Open

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

w3c/css-houdini-drafts#1167 · Opened Feb 17, 2026
[css-typed-om] Serialization of 2D CSSScale should never skip the second value Open

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

w3c/css-houdini-drafts#1161 · 3 comments · Opened Nov 18, 2025
[css-typed-om] Can we avoid property-specific reification rules for most cases? Open

css-typed-om-1

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

w3c/css-houdini-drafts#1159 · 13 comments · 2 reactions · Opened Oct 14, 2025
[css-typed-om] Recursion in CSSUnparsedValue isn't handled in serialization algorithm Open

css-typed-om-1

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

w3c/css-houdini-drafts#1158 · Opened Oct 3, 2025
[css-typed-om] `StylePropertyMap.set()` and `.append()` don't reject string `var()` references Open

css-typed-om-1

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

w3c/css-houdini-drafts#1157 · 1 comment · Opened Oct 3, 2025
[css-typed-om] Unclear how to get the source string when multiple CSSStyleValues are created from USVString Open

css-typed-om-1

Difficulty 5/5 Over a week Newbie friendliness 30/100

w3c/css-houdini-drafts#1156 · Opened Sep 19, 2025
[css-typed-om] CSSMatrixComponent handles `is2D` inconsistently Open

css-typed-om-1

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

w3c/css-houdini-drafts#1155 · 1 comment · Opened Sep 16, 2025
[css-typed-om] Should serialize a CSSUnparsedValue append /**/ between USVStrings? Open

css-typed-om-1

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

w3c/css-houdini-drafts#1154 · Opened Sep 13, 2025
[css-typed-om] `CSSTransformComponent` attributes are under- or incorrectly specced Open

css-typed-om-1

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

w3c/css-houdini-drafts#1153 · Opened Sep 12, 2025
[css-typed-om-1] Several algorithms are missing handling for CSSMathClamp Open

css-typed-om-1

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

w3c/css-houdini-drafts#1152 · Opened Aug 19, 2025
[css-typed-om-1] "Serialize a CSSNumericValue" doesn't pass "nested" and "paren-less" to CSSMathValue Open

css-typed-om-1

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

w3c/css-houdini-drafts#1151 · Opened Aug 19, 2025
[css-typed-om] Serialization for CSSUnparsedValue doesn't match tested behaviour Open

css-typed-om-1

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

w3c/css-houdini-drafts#1148 · Opened Aug 14, 2025
[css-typed-om] CSSKeywordValue should serialize using "serialize an identifier" Open

css-typed-om-1

Difficulty 1/5 Under an hour Newbie friendliness 45/100

w3c/css-houdini-drafts#1147 · Opened Aug 14, 2025
[css-typed-om-1] Missing definitions Open

css-typed-om-1

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

w3c/css-houdini-drafts#1146 · Opened Aug 14, 2025
[css-properties-values-api] Allow custom properties to be used for initial-value inside @property Open

css-properties-values-api-1

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

w3c/css-houdini-drafts#1140 · 1 comment · Opened Mar 22, 2025
[css-typed-om] Apply the percent hint returns a value which is never used Open

css-typed-om-1

Difficulty 1/5 Under an hour Newbie friendliness 68/100

w3c/css-houdini-drafts#1135 · 1 reaction · Opened Dec 13, 2024
[css-typed-om] Clarification on the behavior of StylePropertyMapReadOnly.get() (disagreement between spec and WPT) Open

css-typed-om-1

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

w3c/css-houdini-drafts#1133 · Opened Nov 13, 2024
[css-properties-values-api-1] Define `syntax` with `<string> | <syntax>` Open

css-properties-values-api-1

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

w3c/css-houdini-drafts#1132 · 1 reaction · Opened Oct 25, 2024
[css-properties-values-api-1] Is `@property` valid with `initial-value: smaller` and non-unversal `syntax`? Open

css-properties-values-api-1

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

w3c/css-houdini-drafts#1131 · Opened Oct 8, 2024
[css-properties-values-api-1] Should `@property` always be invalid with CSS-wide keywords or property substitutions for `initial-value`? Open

css-properties-values-api-1

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

w3c/css-houdini-drafts#1130 · Opened Oct 8, 2024
[css-typed-om-1] `currentColor` is not the only non-absolute color Open

css-typed-om-1

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

w3c/css-houdini-drafts#1125 · 3 comments · Opened Mar 21, 2024
[css-animation-worklet-1] how to enable CSS.animationWorklet Open

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

w3c/css-houdini-drafts#1123 · 1 reaction · Opened Feb 29, 2024
[css-properties-values-api] `initial-value` for `*` with arbitrary substitution values Open

Closed Accepted by Editor Discretion css-properties-values-api-1 Needs Edits

Difficulty 4/5 3-5 days Newbie friendliness 42/100

w3c/css-houdini-drafts#1120 · 4 comments · Opened Jan 29, 2024
[scroll-customization-api] is there still interest/ongoing discussions for scroll customization? Open

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

w3c/css-houdini-drafts#1118 · 5 comments · 4 reactions · Opened Dec 13, 2023
[css-properties-values-api-1] `CSSPropertyRule.initialValue` should not be nullable Open

css-properties-values-api-1

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

w3c/css-houdini-drafts#1115 · 1 comment · Opened Nov 8, 2023
[css-properties-values-api] Clarify parsing of duplicate descriptor declarations Open

css-properties-values-api-1

Difficulty 2/5 1-3 hours Newbie friendliness 58/100

w3c/css-houdini-drafts#1112 · Opened Oct 18, 2023
[css-properties-values-api] `<transform-function>` interpolation between different function types Open

css-properties-values-api-1

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

w3c/css-houdini-drafts#1110 · Opened Oct 17, 2023
[css-properties-values-api] Make `initial-value` descriptor optional Open

css-properties-values-api-1

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

w3c/css-houdini-drafts#1109 · 1 reaction · Opened Oct 12, 2023
[css-properties-values-api] Providing a way for @property to be opinionated about its usage Open

css-properties-values-api-2

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

w3c/css-houdini-drafts#1108 · 8 reactions · Opened Sep 5, 2023
[css-properties-values-api] Clarify whether lengths using viewport units are "computationally independent" Open

css-properties-values-api-1

Difficulty 1/5 Under an hour Newbie friendliness 45/100

w3c/css-houdini-drafts#1105 · Opened Aug 18, 2023
[css-typed-om] structuredClone for typed-om objects Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

w3c/css-houdini-drafts#1101 · 6 comments · Opened Jul 9, 2023
[css-properties-values-api] JS API should use CSSOMString Open

css-properties-values-api-1

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

w3c/css-houdini-drafts#1099 · Opened Jun 26, 2023
[css-typed-om] StylePropertyMapReadOnly.get return type should be nullable Open

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

w3c/css-houdini-drafts#1095 · Opened May 8, 2023
[css-typed-om] ratio Open

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

w3c/css-houdini-drafts#1094 · 1 reaction · Opened May 3, 2023
[css-typed-om] what is "hint" in "add two types" step 3 Open

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

w3c/css-houdini-drafts#1093 · 3 comments · Opened Apr 25, 2023
[css-typed-om] do types have hints? Open

Closed Accepted as Obvious Bugfix css-typed-om-1 Needs Edits

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

w3c/css-houdini-drafts#1092 · 1 comment · Opened Apr 25, 2023
[css-typed-om] Math functions that correspond css math functions declared in css-values-4 Open

css-typed-om-1

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

w3c/css-houdini-drafts#1090 · 4 comments · 1 reaction · Opened Apr 10, 2023
[css-typed-om] Make CSSUnitValue use unrestricted double Open

css-typed-om-1 Needs Edits

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

w3c/css-houdini-drafts#1089 · 1 comment · Opened Mar 27, 2023
[css-properties-values-api][css-paint-api] Feature proposal: Value Transform worklets Open

css-properties-values-api-2

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

w3c/css-houdini-drafts#1088 · 5 comments · 2 reactions · Opened Mar 25, 2023
[css-layout-api] Is there any way to access the properties of children of an element that uses `display: layout(foo)` ? Open

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

w3c/css-houdini-drafts#1082 · 2 comments · Opened Jan 19, 2023
Dependency Cycles via Relative Units with unit algebra Open

css-properties-values-api-1 Needs Edits

Difficulty 5/5 Over a week Newbie friendliness 30/100

w3c/css-houdini-drafts#1080 · 3 comments · Opened Dec 2, 2022
[css-animation-worklet-1] Broken references in CSS Animation Worklet API Open

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

w3c/css-houdini-drafts#1079 · 1 comment · Opened Nov 16, 2022
[css-typed-om] "create a sum value" behavior is undefined for CSSMathClamp type Open

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

w3c/css-houdini-drafts#1078 · Opened Oct 18, 2022
should paint() take <custom-ident> rather than <ident>? Open

css-paint-api-1

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

w3c/css-houdini-drafts#1077 · 1 comment · 1 reaction · Opened Jul 14, 2022
initial value for universal ("*") syntax definition should not allow CSS-wide keywords Open

css-properties-values-api-1

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

w3c/css-houdini-drafts#1076 · 4 comments · Opened Jul 13, 2022
[css-layout-api] Add markup to define `layout()` Open

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

w3c/css-houdini-drafts#1074 · Opened Jun 19, 2022

w3c/css-houdini-drafts

Get new issues in your inbox