[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.


Developer interest in Anchor positioning is increasingly diversifying into  
Anchor position container queries , with new engagement from researchers at  
the Technical University of Munich. The border-shape proposal experienced a  
notable relative surge in activity this period, including support from  
Little Fragments. High-utility primitives like field-sizing , if() , and  
Speculation rules —the latter drawing interest from engineers at Lucid  
Software—continue to accumulate signals, reinforcing a trend toward native  
alternatives for common JS workarounds. Additionally, Masonry and Temporal  
maintain steady momentum, signaling sustained community focus on bringing  
these long-awaited layout and API capabilities to a cross-browser baseline.


2 closed features (became Baseline Newly Available)


Math.sumPrecise() (#283)
Custom highlights (#179)

5 newly created features


integrity() for url() (#565)
Device-bound session credentials (#564)
Web app origin migration (#563)
referrer-policy() for url() (#562)
cross-origin() for url() (#561)

39 active features


border-shape (#555)

👍 +4

Anchor position container queries (#466)

👍 +3

Masonry (#308)

👍 +3

Speculation rules (#186)

👍 +3

if() (#303)

👍 +2

contrast-color() (#295)

👍 +2

Temporal (#291)

👍 +2

<dialog closedby> (#279)

👍 +2

calc-size() (#252)

👍 +2

field-sizing (#234)

👍 +2

Fetch upload streams (#83)

👍 +2

focusgroup (#546)

👍 +1

JavaScript promise integration (WebAssembly) (#521)

👍 +1

scroll-target-group (#475)

👍 +1

Range syntax for style queries (#465)

👍 +1

scrollIntoView() container (#463)

👍 +1

justify-self in block layouts (#442)

👍 +1

Local network access (#367)

👍 +1

sibling-count() and sibling-index() (#361)

👍 +1

stretch (#319)

👍 +1

:open (#310)

👍 +1

@function (#300)

👍 +1

attr() (#293)

👍 +1

Customizable <select> (#278)

👍 +1

:has-slotted (#276)

👍 +1

Memory64 (WebAssembly) (#269)

👍 +1

interpolate-size (#253)

👍 +1

Anchor positioning (#245)

👍 +1

word-break: auto-phrase (#221)

👍 +1

JPEG XL (#215)

👍 +1

Scroll-driven animations (#207)

👍 +1

WebGPU (#202)

👍 +1

margin-trim (#201)

👍 +1

Container style queries (#196)

👍 +1

background-clip: text (#129)

👍 +1

::marker (#128)

👍 +1

Page lifecycle (#89)

👍 +1

Remote playback (#64)

👍 +1

<datalist> (#51)

👍 +1


Activity since 2026-04-16