[developer-signals] monthly digest
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Sep 3, 2026, 11:36:51 AMSep 3
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WebDX CG developer-signals monthly digest
web-platform-dx/developer-signals
This is an automated email summarizing recent activity on the developer-signals repo, which is where web developers add their support for web features that are not yet implemented in all major browsers.
Strong developer demand continues to center on foundational platform capabilities, led by steady engagement on Scroll-driven animations, Anchor positioning, Temporal, JPEG XL, and Customizable <select>. Interest in expressive styling and native logic also accelerated across corner-shape, border-shape, @mixin, and @function, where developers emphasized that lacking primitives like @function and if() continues to mandate repetitive stylesheets and unnecessary JavaScript fallbacks. Meanwhile, persistent engine gaps across specialized capabilities such as Sanitizer API, Speech recognition, Window management, and Background fetch continue to force teams into shipping heavy polyfills or restricting browser support. Coupled with implementation hurdles in form controls like showPicker() for <input>, the overarching sentiment remains that achieving cross-browser parity on native logic and device APIs is essential to shedding external library dependencies and delivering streamlined web applications.
3 closed features (became Baseline Newly Available)
- sibling-count() and sibling-index() (#361)
- Exception references with exnref (WebAssembly) (#256)
- EXT_texture_compression_rgtc WebGL extension (#120)
12 newly created features
- Responsive iframes (#914)
- window-drag (#913)
- Connection allowlists (#912)
- Soft navigation performance entries (#911)
- Interaction contentful paint (#910)
- alpha() (#909)
- <template for> (#908)
- HTML processing instructions (#907)
- flex-wrap: balance (#906)
- Anchor positioning animations and transitions (#905)
- Text import attributes (#899)
- Scroll method promises (#898)
150 active features
- Scroll-driven animations (#207)
- 👍 +14
- 💬 +1
- "I'm using brave browser and it did not work. I used it in another test project and it worked. So, I think maybe heavy projects do not work ..." (@ahmed-adel2)
- Temporal (#291)
- 👍 +12
- 💬 +2
- "## What I want to do with this feature Let's see I am using temporal for zdt (ZonedDateTime) and IANA time zone names and time zone support..." (@anthonymhumphreys)
- "@anthonymhumphreys I took the liberty to apply the template to your comment. I did not change the content of your comment, I only added the ..." (@captainbrosset)
- Anchor positioning (#245)
- 👍 +12
- JPEG XL (#215)
- 👍 +11
- Customizable <select> (#278)
- 👍 +10
- corner-shape (#398)
- 👍 +9
- @mixin (#877)
- 👍 +7
- border-shape (#555)
- 👍 +7
- Sanitizer API (#363)
- 👍 +5
- 💬 +1
- "## What I want to do with this feature Sanitizing user HTML, e.g. for https://privatebin.net/ ## What I'm having to do in the meantime <!..." (@rugk)
- @function (#300)
- 👍 +5
- 💬 +1
- "## What I want to do with this feature 1. The most obvious advantage is reusability. I want to interpolate between two values; with `@funct..." (@navedm1424)
- Speculation rules (#186)
- 👍 +5
- 💬 +1
- "## What I want to do with this feature Intelligently prefetch pages using my existing, simple Rails-based stack without cumbersome SPA/ fro..." (@Maferep)
- <input type="checkbox" switch> (#875)
- 👍 +5
- Lazy-loading media (#534)
- 👍 +5
- Custom media queries (#445)
- 👍 +5
- Masonry (#308)
- 👍 +5
- attr() (#293)
- 👍 +5
- line-clamp (#267)
- 👍 +4
- 💬 +3
- "Pls restricted the FF Flip letters ..." (@fernandoatorres13-creator)
- "And tyyy..." (@fernandoatorres13-creator)
- "#267..." (@fernandoatorres13-creator)
- element() (#297)
- 👍 +4
- 💬 +1
- "Does the spec really even exist if Firefox is the only browser that implements it? (9 years and counting)..." (@Simon-Tang)
- Eyedropper (#158)
- 👍 +4
- 💬 +1
- "## What I want to do with this feature We created a color input for our website, we hooked EyeDropper API to a button which toggles EyeDrop..." (@dogakorkmaz35)
- popover="hint" (#274)
- 👍 +4
- Container scroll-state queries (#272)
- 👍 +4
- calc-size() (#252)
- 👍 +4
- User agent client hints (#242)
- 👍 +4
- <datalist> (#51)
- 👍 +4
- overflow-clip-margin (#311)
- 👍 +3
- 💬 +1
- "## What I want to do with this feature Let a small interactive affordance (e.g. a column-resize handle) overhang a couple px past its conta..." (@deviprsd)
- if() (#303)
- 👍 +3
- 💬 +1
- "## What I want to do with this feature Modulate component styling according to app color scheme. (There are four schemes available, not two..." (@Quelklef)
- Barcode detector (#121)
- 👍 +3
- 💬 +1
- "I needed this when trying to build a collaborative game via WebRTC using QR codes for signaling. The flow needed two QR codes, but using the..." (@LeaVerou)
- Heading offset (#876)
- 👍 +3
- Interest invokers (#464)
- 👍 +3
- interpolate-size (#253)
- 👍 +3
- CloseWatcher (#249)
- 👍 +3
- Media element pseudo-classes (#166)
- 👍 +3
- Virtual keyboard (#153)
- 👍 +3
- Share targets (#107)
- 👍 +3
- Fullscreen API (#93)
- 👍 +3
- Battery status (#45)
- 👍 +3
- OpaqueRange (#579)
- 👍 +2
- 💬 +1
- "HBIE..." (@sahajoydev289-coder)
- Speech recognition (#318)
- 👍 +2
- 💬 +1
- "## What I want to do with this feature Allow users to record notes without having to type, specifically useful for when assembling somethin..." (@solonovamax)
- Badging (#117)
- 👍 +2
- 💬 +1
- "Badging would certainly be a neat thing to give web developers access to. But the absolutely overriding and dominant use case (for me anywa..." (@johnkw)
- Web MIDI (#50)
- 👍 +2
- 💬 +1
- "Firefox is my go to webrowser on all my devices (laptop / handled / android...) because it allows privacy and choices. I want to be able to..." (@pitrackster)
- <meta name="text-scale"> (#517)
- 👍 +2
- <geolocation> (#515)
- 👍 +2
- scroll-target-group (#475)
- 👍 +2
- ariaNotify() (#423)
- 👍 +2
- Heading pseudo-classes (#384)
- 👍 +2
- ::scroll-button (#316)
- 👍 +2
- Hanging punctuation (#302)
- 👍 +2
- reading-flow (#290)
- 👍 +2
- Scroll markers (#289)
- 👍 +2
- :has-slotted (#276)
- 👍 +2
- text-box (#265)
- 👍 +2
- Document picture-in-picture (#260)
- 👍 +2
- text-wrap: pretty (#212)
- 👍 +2
- WebGPU (#202)
- 👍 +2
- accent-color (#146)
- 👍 +2
- Fetch upload streams (#83)
- 👍 +2
- Save-Data (#81)
- 👍 +2
- requestIdleCallback() (#52)
- 👍 +2
- Audio and video tracks (#43)
- 👍 +2
- Notifications (#23)
- 👍 +2
- Window management (#198)
- 👍 +1
- 💬 +1
- "## What I want to do with this feature Exam proctoring has grown in importance since the 2020 pandemic and it is far easier to effect this ..." (@paulkorir)
- Launch handler (#190)
- 👍 +1
- 💬 +1
- "## What I want to do with this feature My best use case is when I want to have my users authenticated. If they are already authenticated in..." (@GurusoftHub)
- showPicker() for <input> (#162)
- 👍 +1
- 💬 +1
- "We have custom `date` and `datetime-local` inputs that supports `strtotime` type parsing that allows the user to do things like "2 weeks fro..." (@aronduby)
- Background fetch (#97)
- 👍 +1
- 💬 +1
- "## What I want to do with this feature Our PWA has several documents and images that need to be available offline. When a user opts-in to d..." (@shane-smith)
- Anchor positioning transforms (#860)
- 👍 +1
- <usermedia> (#581)
- 👍 +1
- HTML in canvas (#569)
- 👍 +1
- light-dark() image values (#568)
- 👍 +1
- overscroll-behavior (#567)
- 👍 +1
- integrity() for url() (#565)
- 👍 +1
- referrer-policy() for url() (#562)
- 👍 +1
- cross-origin() for url() (#561)
- 👍 +1
- dynamic-range-limit (#553)
- 👍 +1
- focusgroup (#546)
- 👍 +1
- <install> (#522)
- 👍 +1
- random() (#514)
- 👍 +1
- Translator (#512)
- 👍 +1
- Language detector (#511)
- 👍 +1
- filter() (#509)
- 👍 +1
- AudioListener (#499)
- 👍 +1
- Anchor position container queries (#466)
- 👍 +1
- Range syntax for style queries (#465)
- 👍 +1
- scrollIntoView() container (#463)
- 👍 +1
- at-rule() (#447)
- 👍 +1
- Reference target (#446)
- 👍 +1
- progress() (#444)
- 👍 +1
- justify-self in block layouts (#442)
- 👍 +1
- IndexedDB getAllRecords() (#422)
- 👍 +1
- Fetch metadata request headers (#406)
- 👍 +1
- Periodic background sync (#380)
- 👍 +1
- Explicit resource management (#366)
- 👍 +1
- Scoped custom element registries (#364)
- 👍 +1
- Gap decorations (#362)
- 👍 +1
- stretch (#319)
- 👍 +1
- speak (#317)
- 👍 +1
- prefers-reduced-data media query (#314)
- 👍 +1
- interactivity (#305)
- 👍 +1
- ::column (#294)
- 👍 +1
- fetchLater (#286)
- 👍 +1
- font-width (#285)
- 👍 +1
- <dialog closedby> (#279)
- 👍 +1
- moveBefore() (#273)
- 👍 +1
- font-variant-emoji (#262)
- 👍 +1
- Compression Dictionary Transport (#258)
- 👍 +1
- Scroll snap events (#255)
- 👍 +1
- Scheduler API (#254)
- 👍 +1
- <img sizes="auto" loading="lazy"> (#250)
- 👍 +1
- Cross-document view transitions (#248)
- 👍 +1
- CSS import attributes (#233)
- 👍 +1
- showPicker() for <select> (#226)
- 👍 +1
- Global privacy control (#222)
- 👍 +1
- font-synthesis-position (#217)
- 👍 +1
- Federated credential management (#208)
- 👍 +1
- margin-trim (#201)
- 👍 +1
- baseline-source (#192)
- 👍 +1
- initial-letter (#189)
- 👍 +1
- Hyphenate limit chars (#184)
- 👍 +1
- text-decoration in ::selection (#181)
- 👍 +1
- object-view-box (#177)
- 👍 +1
- File handlers (#173)
- 👍 +1
- hidden="until-found" (#170)
- 👍 +1
- video-dynamic-range media query (#169)
- 👍 +1
- image-rendering: smooth (#154)
- 👍 +1
- <meta name="theme-color"> (#145)
- 👍 +1
- Font metric overrides (#132)
- 👍 +1
- Layout instability (#122)
- 👍 +1
- Gamepad haptic feedback (#87)
- 👍 +1
- CSS typed object model (#85)
- 👍 +1
- navigator.share() (#76)
- 👍 +1
- text-justify (#75)
- 👍 +1
- SharedArrayBuffer in WebGL (#72)
- 👍 +1
- controlslist (#68)
- 👍 +1
- autocapitalize (#66)
- 👍 +1
- Remote playback (#64)
- 👍 +1
- text-size-adjust (#61)
- 👍 +1
- host-context (#60)
- 👍 +1
- user-select (#59)
- 👍 +1
- Web app manifest (#57)
- 👍 +1
- cross-fade() (#55)
- 👍 +1
- font-language-override (#49)
- 👍 +1
- Screen orientation lock (#46)
- 👍 +1
- Cursor styles (#35)
- 👍 +1
- 2D canvas opacity (#34)
- 👍 +1
- ping (#20)
- 👍 +1
- Touch events (#18)
- 👍 +1
- resize (CSS property) (#17)
- 👍 +1
- alignment-baseline (#15)
- 👍 +1
- Alternative style sheets (#13)
- 👍 +1
- Widows and orphans (#11)
- 👍 +1
- getBoxQuads() (#301)
- 💬 +1
- "Implementation for Chrome - behind a flag now in canary (impl: https://chromium-review.googlesource.com/c/chromium/src/+/8039580) Ladybird..." (@jogibear9988)
Activity since 2026-08-01
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