[developer-signals] weekly digest

WebDX CG developer-signals weekly 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.


JPEG XL continues its significant upward trajectory with 19 new upvotes  
from organizations including Cloudinary and intoPIX, pushing its total  
count to 428. High engagement for Anchor positioning remains steady with 8  
new upvotes, including interest from IBM, while Customizable <select> and  
attr() saw notable gains that reflect continued demand for flexible UI  
primitives. Broad-based support for CSS logic and layout persists as  
Masonry , if() , and interpolate-size all recorded fresh activity. Newer  
signals for popover="hint" and Lazy-loading media continue to accumulate,  
further highlighting developer interest in improved native component  
behaviors and performance optimizations.


7 closed features (became Baseline Newly Available)


Math font family (#538)
Iterator.concat() (#494)
WebTransport (#159)
Reporting API (#156)
text-indent: hanging (#150)
text-indent: each-line (#149)
Readable byte streams (#137)

2 newly created features


focusgroup (#546)
Form-associated WebMCP attributes (#545)

40 active features


JPEG XL (#215)

👍 +19

Anchor positioning (#245)

👍 +8

Masonry (#308)

👍 +4

attr() (#293)

👍 +4

Customizable <select> (#278)

👍 +4

Lazy-loading media (#534)

👍 +3

filter() (#509)

👍 +3

random() (#514)

👍 +2

if() (#303)

👍 +2

Temporal (#291)

👍 +2

popover="hint" (#274)

👍 +2

Container scroll-state queries (#272)

👍 +2

interpolate-size (#253)

👍 +2

Federated credential management (#208)

👍 +2

Scroll-driven animations (#207)

👍 +2

Fetch form data (#537)

👍 +1

JavaScript promise integration (WebAssembly) (#521)

👍 +1

<meta name="text-scale"> (#517)

👍 +1

Web app manifest localization (#516)

👍 +1

<geolocation> (#515)

👍 +1

display-mode media query (#508)

👍 +1

:autofill (#500)

👍 +1

Permissions policy (#479)

👍 +1

Scroll marker target pseudo-classes (#476)

👍 +1

Web authentication signal methods (#381)

👍 +1

Periodic background sync (#380)

👍 +1

Scoped custom element registries (#364)

👍 +1

Sanitizer API (#363)

👍 +1

:open (#310)

👍 +1

@function (#300)

👍 +1

display: contents (#296)

👍 +1

text-box (#265)

👍 +1

Private network access (#241)

👍 +1

WebGPU (#202)

👍 +1

context-fill and context-stroke (#199)

👍 +1

Container style queries (#196)

👍 +1

Speculation rules (#186)

👍 +1

user-select (#59)

👍 +1

Web app manifest (#57)

👍 +1

requestIdleCallback() (#52)

👍 +1


Activity since 2026-03-26