📃 March 2025 release notes
Newly available
The following features are newly available:
-
ClipboardItem.supports():
The
ClipboardItem.supports()
static method checks if the browser supports writing data types such as "image/svg+xml" or other custom formats to the system clipboard. -
contenteditable="plaintext-only":
The
contenteditable="plaintext-only"
global HTML attribute allows the user to edit the content of an element, but prevents rich-text formatting. -
Intl.DurationFormat:
The
Intl.DurationFormat
API creates a locale-aware formatter that turns an object representing a duration (such as days, hours, and minutes) into a string. -
Iterator methods:
The
Iterator
object is an abstract base for objects that implement the iterator protocol. It provides methods common to built-in iterators, such asfilter()
,find()
,map()
, andreduce()
. You can also use the static methodIterator.from()
to convert an existing iterable into anIterator
. -
Screen wake lock:
The
navigator.wakeLock.request("screen")
API prevents the device's screen from dimming or being turned off.
Widely available
The following features are now widely available:
-
Inline-size containment:
The
contain: inline-size
CSS declaration prevents the element's inline dimension from being set by the element's contents. This permits the browser to avoid slower layout calculations. -
Forced colors:
The
forced-colors
CSS @media rule detects when a user has chosen to use a forced colors mode, also known as high-contrast mode, and theforced-color-adjust
CSS property sets whether forced colors apply to an element. -
:modal:
The
:modal
pseudo-class selects elements that put other elements into a non-interactive state, such as a fullscreen element or a<dialog>
element used withshowModal()
. -
Motion path:
The
offset
CSS property animates an element along a defined motion path. -
overflow: clip:
The
overflow: clip
CSS declaration clips an element's overflowing content to the box that's defined by theoverflow-clip-margin
property. Unlikeoverflow: hidden
, it allows you to hide overflow on one axis while keeping overflow on the other axis visible. -
overscroll-behavior:
The
overscroll-behavior
CSS property disables default scrolling behaviors when the edges of a scrolling area are reached. -
Permissions:
The
navigator.permissions
API checks whether a permission, such as access to geolocation data, has been granted. -
resolution media query:
The
resolution
CSS media query sets styles based on the pixel density, or how many pixels a device uses to display a single CSS pixel. -
text-align-last:
The
text-align-last
CSS property sets the alignment of the last line of text before a forced line break.
New in Chrome
The following features are now available in Chrome:
-
<dialog closedby>:
The
closedby
HTML attribute for<dialog>
sets which user actions close a dialog. For example,closedby="any"
allows the dialog to be closed by clicking outside of it. -
Explicit resource management:
The
using
andawait using
declarations and thedispose
andasyncDispose
symbols manage the lifecycle of resources such as file handles and streams. TheDisposableStack
andAsyncDisposableStack
objects can group, dispose, and coordinate dependencies between multiple disposable resources. -
:has-slotted:
The
:has-slotted
CSS pseudo-class matches<slot>
elements where the fallback content is not shown. The pseudo-class matches any slotted content, including white space, text nodes, or elements. -
Error.isError():
The
Error.isError()
static method checks whether a value is anError
object. -
<meta name="application-title">:
The
name="application-title"
attribute for the<meta>
HTML element sets an installed web application's title bar text. -
dialog.requestClose():
The
requestClose()
method of a<dialog>
HTML element closes the dialog, firing acancel
event first, which listeners can use to prevent the dialog from closing. This differs from theclose()
method, which only fires the non-cancelableclose
event. -
Shared storage locks:
The
withLock
option toset()
,append()
,delete()
,clear()
, andbatchUpdate()
methods of thesharedStorage
API prevents duplicate reporting from cross-site race conditions.
New in Chrome Android
The following features are now available in Chrome Android:
-
<dialog closedby>:
The
closedby
HTML attribute for<dialog>
sets which user actions close a dialog. For example,closedby="any"
allows the dialog to be closed by clicking outside of it. -
Explicit resource management:
The
using
andawait using
declarations and thedispose
andasyncDispose
symbols manage the lifecycle of resources such as file handles and streams. TheDisposableStack
andAsyncDisposableStack
objects can group, dispose, and coordinate dependencies between multiple disposable resources. -
:has-slotted:
The
:has-slotted
CSS pseudo-class matches<slot>
elements where the fallback content is not shown. The pseudo-class matches any slotted content, including white space, text nodes, or elements. -
Error.isError():
The
Error.isError()
static method checks whether a value is anError
object. -
<meta name="application-title">:
The
name="application-title"
attribute for the<meta>
HTML element sets an installed web application's title bar text. -
dialog.requestClose():
The
requestClose()
method of a<dialog>
HTML element closes the dialog, firing acancel
event first, which listeners can use to prevent the dialog from closing. This differs from theclose()
method, which only fires the non-cancelableclose
event. -
Shared storage locks:
The
withLock
option toset()
,append()
,delete()
,clear()
, andbatchUpdate()
methods of thesharedStorage
API prevents duplicate reporting from cross-site race conditions.
New in Edge
The following features are now available in Edge:
-
<dialog closedby>:
The
closedby
HTML attribute for<dialog>
sets which user actions close a dialog. For example,closedby="any"
allows the dialog to be closed by clicking outside of it. -
Digital goods:
The
window.getDigitalGoodsService
API connects to stores or billing services for in-app products and subscriptions. -
Explicit resource management:
The
using
andawait using
declarations and thedispose
andasyncDispose
symbols manage the lifecycle of resources such as file handles and streams. TheDisposableStack
andAsyncDisposableStack
objects can group, dispose, and coordinate dependencies between multiple disposable resources. -
:has-slotted:
The
:has-slotted
CSS pseudo-class matches<slot>
elements where the fallback content is not shown. The pseudo-class matches any slotted content, including white space, text nodes, or elements. -
Error.isError():
The
Error.isError()
static method checks whether a value is anError
object. -
<meta name="application-title">:
The
name="application-title"
attribute for the<meta>
HTML element sets an installed web application's title bar text. -
dialog.requestClose():
The
requestClose()
method of a<dialog>
HTML element closes the dialog, firing acancel
event first, which listeners can use to prevent the dialog from closing. This differs from theclose()
method, which only fires the non-cancelableclose
event. -
Shared storage locks:
The
withLock
option toset()
,append()
,delete()
,clear()
, andbatchUpdate()
methods of thesharedStorage
API prevents duplicate reporting from cross-site race conditions.
New in Firefox
The following features are now available in Firefox:
-
autocorrect:
The
autocorrect
global HTML attribute controls whether to automatically correct spelling or punctuation errors for user input. -
:has-slotted:
The
:has-slotted
CSS pseudo-class matches<slot>
elements where the fallback content is not shown. The pseudo-class matches any slotted content, including white space, text nodes, or elements. -
:open:
The
:open
CSS pseudo-class matches elements that have open states, like<details>
,<dialog>
, or<select>
, based on their state. -
Single color stop gradients:
A single color stop can be provided to the
linear-gradient()
,radial-gradient()
, andconic-gradient()
CSS functions, and their repeating counterparts, to create a solid color background.
New in Firefox for Android
The following features are now available in Firefox for Android:
-
autocorrect:
The
autocorrect
global HTML attribute controls whether to automatically correct spelling or punctuation errors for user input. -
:has-slotted:
The
:has-slotted
CSS pseudo-class matches<slot>
elements where the fallback content is not shown. The pseudo-class matches any slotted content, including white space, text nodes, or elements. -
:open:
The
:open
CSS pseudo-class matches elements that have open states, like<details>
,<dialog>
, or<select>
, based on their state. -
Single color stop gradients:
A single color stop can be provided to the
linear-gradient()
,radial-gradient()
, andconic-gradient()
CSS functions, and their repeating counterparts, to create a solid color background.
New in Safari
The following features are now available in Safari:
-
Atomics.pause():
The
Atomics.pause()
static method gives a hint to the CPU that the code calling the method is in a short-duration wait for shared memory, known as spinning or a spinlock. -
::details-content:
The
::details-content
pseudo-element selects the expandable content of a<details>
element, excluding the<summary>
. -
font-width:
The
font-width
CSS property selects a font face from a font family based on width, either by a keyword such ascondensed
or a percentage. -
dialog.requestClose():
The
requestClose()
method of a<dialog>
HTML element closes the dialog, firing acancel
event first, which listeners can use to prevent the dialog from closing. This differs from theclose()
method, which only fires the non-cancelableclose
event. -
Single color stop gradients:
A single color stop can be provided to the
linear-gradient()
,radial-gradient()
, andconic-gradient()
CSS functions, and their repeating counterparts, to create a solid color background. -
text-autospace:
The
text-autospace
CSS property sets whether and how to insert spaces in inter-script text (such as when mixing Latin and Chinese characters) and around punctuation. -
Exception references with exnref (WebAssembly):
When caught, an exception is reified into an exception reference, a value of the new type
exnref
.
New in Safari on iOS
The following features are now available in Safari on iOS:
-
Atomics.pause():
The
Atomics.pause()
static method gives a hint to the CPU that the code calling the method is in a short-duration wait for shared memory, known as spinning or a spinlock. -
::details-content:
The
::details-content
pseudo-element selects the expandable content of a<details>
element, excluding the<summary>
. -
dialog.requestClose():
The
requestClose()
method of a<dialog>
HTML element closes the dialog, firing acancel
event first, which listeners can use to prevent the dialog from closing. This differs from theclose()
method, which only fires the non-cancelableclose
event. -
Single color stop gradients:
A single color stop can be provided to the
linear-gradient()
,radial-gradient()
, andconic-gradient()
CSS functions, and their repeating counterparts, to create a solid color background. -
text-autospace:
The
text-autospace
CSS property sets whether and how to insert spaces in inter-script text (such as when mixing Latin and Chinese characters) and around punctuation. -
Exception references with exnref (WebAssembly):
When caught, an exception is reified into an exception reference, a value of the new type
exnref
.