📃 October 2021 release notes

Newly available

The following features are newly available:

image-rendering: The image-rendering CSS property sets how images are scaled, retaining smoothness for photos, or hard edges for pixel art and QR codes.
Navigation timing: The navigation performance entry and the PerformanceNavigationTiming API measures navigation events, such as loading time or the number of redirects.
Bulk memory operations (WebAssembly): Bulk memory operations, such as copy and init, mirror the efficiency of native memcpy and memmove operations.
Non-trapping float-to-int conversion (WebAssembly): Saturating floating-point to integer conversion operators return the maximum or minimum integer value on overflow instead of trapping.

The following features are now available in Chrome:

URLPattern: The URLPattern API creates patterns that can be matched against URLs or URL components.
Exception handling (WebAssembly): Exceptions break the normal control flow of execution to represent exceptional behavior, such as an error. You can respond to the exception in JavaScript code.

The following features are now available in Chrome Android:

URLPattern: The URLPattern API creates patterns that can be matched against URLs or URL components.
Exception handling (WebAssembly): Exceptions break the normal control flow of execution to represent exceptional behavior, such as an error. You can respond to the exception in JavaScript code.

The following features are now available in Edge:

URLPattern: The URLPattern API creates patterns that can be matched against URLs or URL components.
Exception handling (WebAssembly): Exceptions break the normal control flow of execution to represent exceptional behavior, such as an error. You can respond to the exception in JavaScript code.

The following features are now available in Firefox:

AVIF: AVIF (AV1 Image File Format) is an image format based on the AV1 video format.
smooth: The image-rendering: smooth CSS declaration scales images while retaining a gradual color blending that is useful for photos.

The following features are now available in Firefox for Android:

AVIF: AVIF (AV1 Image File Format) is an image format based on the AV1 video format.
smooth: The image-rendering: smooth CSS declaration scales images while retaining a gradual color blending that is useful for photos.

The following features are now available in Safari:

Reference types (WebAssembly): The externref type can be both a value type and a table element type, while funcref can be a value type.

The following features are now available in Safari on iOS:

Reference types (WebAssembly): The externref type can be both a value type and a table element type, while funcref can be a value type.