chrome 151 · released
chrome 151 platform demos
26 features tracked for Chrome 151. Click a feature's title to open its demo; each card also links to its ChromeStatus entry.
Per-feature demos below are built automatically, one feature per commit, and every distinct use case should become an interactive concept page.
features (26)
Shipped (18)
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Animation accessor on animation and transition events
Adds a read-only animation attribute to the AnimationEvent and TransitionEvent interfaces. This attribute returns the associated Animation object that triggered the event.
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CSS ruby-overhang property
Support of new CSS property `ruby-overhang` is added. The property accepts one of `auto`, `spaces` and `none` keywords to control overhang of ruby annotation text. Per CSSWG, none is aliased to spaces, allowing overhang...
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Capability Elements <usermedia> MVP
Usermedia Capability Element, is a declarative, user-activated control for accessing the starting and interacting with media streams. This addresses the long-standing problem of permission prompts being triggered direct...
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Change the "position-anchor" initial value to "normal"
We are changing the initial value of the "position-anchor" CSS property from "none" to normal to align with other browsers and the specification. "normal" behaves like "none" if the "position-area" CSS property is "none...
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Cross-origin redirect timing opt-in
Currently developers have no way to measure cross-origin redirects for navigations, even ones under their control, or ones that choose to opt-in to be measured. This feature enables servers to opt-in to have their redir...
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Declarative shadow DOM: shadowrootslotassignment attribute
Adds the shadowrootslotassignment attribute to the <template> element, allowing declarative shadow roots to use manual slot assignment. Until now this option was only available imperatively, via attachShadow({slotAssignm...
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DeviceOrientation Events permission request API
Allows web developers to call Device{Motion,Orientation}Event.requestPermission() to ask the user agent for device orientation and motion data to be shared with the page. Those two static methods return a promise that re...
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LanguageDetector support for Traditional vs. Simplified Chinese
Two new detectable language codes, "zh-Hant" and "zh-Hans" will be added. Detection results that previously returned "zh" will now return one of these new values. While this is a developer-visible change it fits within ...
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Navigation: Ignore duplicate navigations
Prevents an ongoing navigation from being unnecessarily canceled by a new, identical navigation that is initiated in quick succession. This optimization improves performance and the user experience by not wasting resourc...
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No Auto-Rewind for AnimationTrigger Play Methods
AnimationTrigger Play Methods will not auto-rewind, i.e. will not restart a finished animation. "play", "play-forwards" and "play-backwards" are values that, when specified in the association between an AnimationTrigger...
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PerformanceSoftNavigation and InteractionContentfulPaint performance entry
Adds "soft-navigation" and "interaction-contentful-paint" PerformanceEntry types to the web performance timeline to track interaction-driven page performance, including for "soft" navigations (JS-driven navigations in Si...
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Permission Policy Merger: "direct-sockets-private" with "local-network" and "loopback-network"
Isolated Web App manifests now require specific "local-network" and/or "loopback-network" permission policies to enable Direct Sockets connections to local or loopback network addresses, respectively. This change replace...
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Remove [LegacyNoInterfaceObject] from FontFaceSet IDL
Chromium's FontFaceSet IDL previously used [LegacyNoInterfaceObject], which hid FontFaceSet as a global property and deleted the constructor property from its prototype. This deviated from the CSS Font Loading spec and d...
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Speculation rules: form_submission field
This extends speculation rules syntax to allow developers to specify the form_submission field for prerender. This field directs the browser to prepare the prerender as a form submission, so that it can be activated by ...
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Web Speech API: Unspoken Punctuation
Adds the unspokenPunctuation boolean attribute to the SpeechRecognition interface of the Web Speech API. When enabled (true), this attribute directs the speech recognition engine to automatically infer and insert punctua...
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Wheel event momentum
Exposes a momentum attribute in wheel events to mark native platforms events for scrolling inertia. After the user has lifted the finger from the trackpad after a fling interaction, many native platforms continue to fire...
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aria-actions
Support aria-actions attribute. There is a common UI pattern where secondary actions are placed within composite interactive widgets. The aria-actions attribute allows us to expose these secondary action buttons direct...
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textStream() for response/request/blob
Add textStream() to interfaces that represent a byte stream (request, response, blob). This is equivalent to piping the byte stream through a TextDecoderStream().
Deprecated (1)
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Chrome 151 removes support for macOS 12
Chrome 150 is the last release to support macOS 12; Chrome 151+ will no longer support macOS 12, which is outside of its support window with Apple. To maintain security, it is essential to run Chrome browser on a support...
Origin Trial (5)
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Algorithm Updates in WebCrypto
Add post-quantum cryptography and a common symmetric AEAD to the set of cryptographic algorithms available in the Web Cryptography API. This will enable developers to have access browser-provided implementations of commo...
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Declarative Performance Observer
The Declarative Performance Observer proposes a reliable browser-resident telemetry system that reports of performance metrics from navigation initiation to page termination. By using a declarative HTTP response header, ...
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Prefetch activation beacon
The on-prefetch-activation HTTP response header enables servers to specify a telemetry endpoint that the browser notifies when a prefetched resource is used for navigation. Developers gain a reliable signal to measure t...
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WebRTC Data Channel: SCTP Negotiation Acceleration Protocol
WebRTC Data Channels use the Stream Control Transmission Protocol (SCTP) over a Datagram Transport Layer Security (DTLS) association. The standard SCTP connection establishment requires a handshake that introduces laten...
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WebRTC Diagnostic Logging API
The Real-time Communication for the Web ([WebRTC](https://webrtc.org/)) Diagnostic Logging API allows authorized web applications to trigger the collection of WebRTC diagnostic data so that it can be used for local debug...
Dev Trial (2)
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More specific protocol filtering in Digital Credential API
Chrome 151 began deprecating support for unspecified presentation and issuance protocols in the **Digital Credentials API**. Final removal of support is now scheduled for Chrome 161. The Digital Credentials API was orig...
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WebTransport anticipated concurrent incoming streams
Allows WebTransport applications to indicate how many incoming streams they expect to have open at once. Constructor hints configure the initial QUIC stream allowance, reducing the risk that a server that needs high stre...