oddbird/css-anchor-positioning

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Polyfill for CSS Anchor Positioning

Stars: 493
Forks: 18
Open beginner issues: 0
Indexed issues: 52
Avg merge: 12h 37m
Merged PRs (30d): 5

Dominant language: TypeScript
License: BSD-3-Clause
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

Beginner friendly Everything

Open All

52 open issues indexed

Support `position-anchor: match-parent` Open

Difficulty 5/5 Over a week Newbie friendliness 42/100

oddbird/css-anchor-positioning#465 · Opened Aug 19, 2026
Support `@container anchored(fallback: ...)` queries Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 42/100

oddbird/css-anchor-positioning#462 · 2 comments · Opened Aug 15, 2026
[BUG] Repeat `polyfill()` runs grow the inline `style` attributes Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

oddbird/css-anchor-positioning#461 · Opened Aug 14, 2026
[BUG] Inline styles inside shadow roots are never collected Open

bug

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

oddbird/css-anchor-positioning#460 · Opened Aug 13, 2026
[BUG] Inset shorthand expansion overrides non-shorthands Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 78/100

oddbird/css-anchor-positioning#456 · Opened Aug 9, 2026
Improve file organization to reduce cycles Open

bug

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

oddbird/css-anchor-positioning#455 · Opened Aug 3, 2026
ReferenceError: ShadowRoot is not defined when auto-polyfill runs without global ShadowRoot Open

Difficulty 3/5 1-2 days Newbie friendliness 67/100

oddbird/css-anchor-positioning#451 · 3 comments · Opened Aug 1, 2026
[BUG] anchor-name and position-anchor set via CSSOM are invisible to the polyfill Open

bug

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

oddbird/css-anchor-positioning#445 · Opened Jul 25, 2026
Explore opportunities to remove external deps. Open

oddbird/css-anchor-positioning#430 · 1 assignee · Opened Jul 10, 2026
Lint example scripts Open

demo-site enhancement good first issue

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

oddbird/css-anchor-positioning#386 · 1 reaction · Opened Mar 13, 2026
[BUG] Non-HTML elements (SVG, MathML) can not be positioned Open

bug

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

oddbird/css-anchor-positioning#369 · 3 comments · Opened Nov 29, 2025
[BUG] Scrolling the viewport moves popovertarget downwards if inside a container with position: sticky Open

bug

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

oddbird/css-anchor-positioning#350 · 2 comments · Opened Sep 14, 2025
[BUG] Fonts with relative paths load from the wrong location Open

bug

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

oddbird/css-anchor-positioning#332 · 3 comments · 1 reaction · Opened May 21, 2025
Allow original styleheet to remain in head Open

enhancement

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

oddbird/css-anchor-positioning#331 · 3 comments · Opened May 3, 2025
Apply polyfill to styles in CSS @imports Open

enhancement

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

oddbird/css-anchor-positioning#326 · 1 reaction · Opened Apr 22, 2025
[BUG] Fallback behavior differences from Chromium implementation Open

bug

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

oddbird/css-anchor-positioning#325 · Opened Apr 21, 2025
[BUG] Popover finds different anchor Open

bug

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

oddbird/css-anchor-positioning#322 · Opened Apr 15, 2025
[BUG] `inset` not overridden correctly in fallbacks Open

bug

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

oddbird/css-anchor-positioning#319 · 2 comments · Opened Apr 14, 2025
Should the demo site use the production builds? Open

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

oddbird/css-anchor-positioning#313 · 2 comments · 1 reaction · Opened Apr 8, 2025
[BUG] Polyfill doesn't handle Vite loading CSS files as JS Open

bug question

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

oddbird/css-anchor-positioning#303 · 5 comments · 1 reaction · Opened Mar 29, 2025
`elements` option should find inline styles on descendent elements Open

enhancement good first issue

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

oddbird/css-anchor-positioning#289 · 3 reactions · Opened Jan 15, 2025
Improve layout for examples on the demo page Open

demo-site enhancement

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

oddbird/css-anchor-positioning#284 · 1 reaction · Opened Dec 18, 2024
[BUG] Pseudo-element anchor demo is broken Open

bug demo-site

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

oddbird/css-anchor-positioning#278 · 1 reaction · Opened Nov 22, 2024
Support implicit anchors Open

enhancement

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

oddbird/css-anchor-positioning#273 · 4 comments · 2 reactions · Opened Nov 20, 2024
Better handling of stylesheet links that have `disabled` and/or `media` Open

enhancement

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

oddbird/css-anchor-positioning#246 · 1 reaction · Opened Sep 13, 2024
[BUG] Autoupdate functionality should clean up after itself. Open

bug

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

oddbird/css-anchor-positioning#240 · Opened Sep 3, 2024
[BUG] Anchoring in a scrolled element is too permissive. Open

bug needs-prioritization

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

oddbird/css-anchor-positioning#234 · Opened Aug 30, 2024
Fallback doesn't support percentage anchor-side values, or anchor fns passed through custom props Open

bug needs-prioritization

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

oddbird/css-anchor-positioning#232 · Opened Aug 30, 2024
Support `position-area`s as a fallback `try-tactic` Open

enhancement needs-prioritization

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

oddbird/css-anchor-positioning#231 · 2 reactions · Opened Aug 30, 2024
Support `flip-start` Open

enhancement needs-prioritization

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

oddbird/css-anchor-positioning#230 · Opened Aug 30, 2024
Support `position-try-order` Open

enhancement needs-prioritization

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

oddbird/css-anchor-positioning#229 · 1 reaction · Opened Aug 30, 2024
Batch DOM checks for fallback positions Open

enhancement

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

oddbird/css-anchor-positioning#227 · 1 reaction · Opened Aug 2, 2024
Support `anchor-scope` for pseudo-elements Open

enhancement

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

oddbird/css-anchor-positioning#220 · 1 reaction · Opened Jul 23, 2024
Support all part-like pseudo-elements. Open

enhancement

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

oddbird/css-anchor-positioning#219 · 1 comment · 1 reaction · Opened Jul 23, 2024
Document and re-organize codebase Open

documentation

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

oddbird/css-anchor-positioning#216 · Opened Jul 18, 2024
Support anchoring on `:hover` Open

enhancement needs-prioritization

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

oddbird/css-anchor-positioning#214 · 1 comment · Opened Jul 16, 2024
Use Layout/Box tree order instead of DOM Tree order Open

anchor-position-1 enhancement good first issue α alpha

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

oddbird/css-anchor-positioning#209 · Opened Jun 28, 2024
Bottom/right positions incorrect for certain inline targets Open

bug ε epsilon

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

oddbird/css-anchor-positioning#194 · Opened May 17, 2024
Anchor function as fallback in anchor function Open

bug ε epsilon

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

oddbird/css-anchor-positioning#193 · Opened May 17, 2024
Anchors in some multicolumn scenarios positioned incorrectly Open

bug ε epsilon

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

oddbird/css-anchor-positioning#192 · 1 comment · Opened May 17, 2024
Anchors and targets in shadow dom Open

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

oddbird/css-anchor-positioning#191 · 4 reactions · Opened May 17, 2024
Vertical/RTL support Open

bug γ gamma

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

oddbird/css-anchor-positioning#190 · 1 comment · Opened May 17, 2024
Overflow fallback with Grid Open

bug γ gamma

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

oddbird/css-anchor-positioning#189 · Opened May 17, 2024
Support anchors that fragment across columns Open

bug γ gamma

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

oddbird/css-anchor-positioning#188 · Opened May 17, 2024
Conditional hiding with `position-visibility` Open

anchor-position-1 β beta

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

oddbird/css-anchor-positioning#185 · Opened May 17, 2024
Implicit anchor elements using `implicit` keyword Open

anchor-position-1 good first issue γ gamma

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

oddbird/css-anchor-positioning#183 · Opened May 17, 2024
Positioning with `anchor-center` Open

anchor-position-1 γ gamma

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

oddbird/css-anchor-positioning#182 · Opened May 17, 2024
[bug] constantly updating example. Open

bug

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

oddbird/css-anchor-positioning#175 · Opened May 6, 2024
Can I load this in a custom-element, so it can access shadow-dom? Open

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

oddbird/css-anchor-positioning#170 · 4 comments · Opened Apr 22, 2024
Fix WPT reporting Open

oddbird/css-anchor-positioning#153 · 2 comments · 1 assignee · Opened Feb 12, 2024

oddbird/css-anchor-positioning

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