JavaScript/Wasm feature support

Our JavaScript and WebAssembly language feature explainers often include feature support listings like the following:

about this feature support listing

A feature without any support would look like this:

about this feature support listing

For cutting-edge features, it’s common to see mixed support across environments:

about this feature support listing

The goal is to provide a quick overview of a feature’s maturity not just in V8 and Chrome, but across the wider JavaScript ecosystem. Note that this is not limited to native implementations in actively-developed JavaScript VMs such as V8, but also includes tooling support, represented using the Babel icon here.

The Babel entry covers various meanings:

The Chrome logo represents V8, Chromium, and any Chromium-based browsers.