Servo 0.4.0 Released with New Web Platform Features and DOM APIs

Servo 0.4.0 Release Overview

Servo 0.4.0 has been released, integrating all changes made during June. This version includes a total of 558 commits, marking an increase in development activity compared to previous months.

New Web Platform Features

The update introduces several new web platform features. These include the 'attr()' function in experimental mode, 'image(<color>)', 'closest-corner', and 'farthest-corner' within 'ellipse()' and 'circle()'. Additionally, 'calc()' and other mathematical expressions can now be resolved later than parse time, and 'font-feature-settings' is supported in '@font-face'.

Expanded Media Query Support

Servo 0.4.0 significantly expands support for media queries. New additions include '@media (device-width)', '@media (device-height)', '@media (height)', '@media (aspect-ratio)', and their min- and max- variants. Support for '@media (orientation)', '@media (pointer)', '@media (any-pointer)', '@media (hover)', and '@media (any-hover)' has also been added.

New DOM APIs

Several new DOM APIs are part of this release. These include SharedWorker, console.dir(), and updates to CustomElementRegistry, such as customElementRegistry on Document and ShadowRoot, initialize() on CustomElementRegistry, and new CustomElementRegistry(). Other additions are textStream() on Request, Response, and Blob, setPointerCapture(), releasePointerCapture(), hasPointerCapture() on Element, and touch event handlers on Element. Cryptographic updates include crypto.subtle.digest() for KT128 and KT256, and crypto.subtle.getPublicKey() for ML-KEM and ML-DSA.

Development Trajectory

The project continues to grow, with the number of commits increasing steadily each month since September 2023. This indicates ongoing development and expansion of Servo's capabilities.