June 2021 web platform update

Now widely available on the web platform
Widely available

Constraint validation API: Methods that validate form controls before submission, such as checkValidity(), reportValidity() and setCustomValidity(). Learn more.

aspect-ratio: The aspect-ratio CSS property controls the width-to-height ratio of elements. For <img> and <video> elements, the width and height attributes used together with height: auto control the aspect ratio while the image/video is loading. Learn more.
image-set(): The image-set() CSS function provides a set of images at different resolutions or pixel densities, which the browser can pick from, depending on the device capabilities. Learn more.
WebAssembly SIMD: The 128-bit SIMD (Single Instruction Multiple Data) extension to WebAssembly performs one instruction on multiple units of data, when running on hardware that supports such instructions. Also known as vector instructions. Learn more.

aspect-ratio: The aspect-ratio CSS property controls the width-to-height ratio of elements. For <img> and <video> elements, the width and height attributes used together with height: auto control the aspect ratio while the image/video is loading. Learn more.
image-set(): The image-set() CSS function provides a set of images at different resolutions or pixel densities, which the browser can pick from, depending on the device capabilities. Learn more.
WebAssembly SIMD: The 128-bit SIMD (Single Instruction Multiple Data) extension to WebAssembly performs one instruction on multiple units of data, when running on hardware that supports such instructions. Also known as vector instructions. Learn more.