Consider having a flag to enable Reference Types proposal

[protheory8]

💡 Feature description

wasm-bindgen has a flag --reference-types that can be used to generate a WebAssembly module that uses post-MVP type externref, however currently there is no way that I'm aware of to enable that flag when using wasm-pack. It would be nice if I could do something like wasm-pack build --reference-types to enable that.

[tiye]

some updated related on V8: https://v8.dev/blog/v8-release-96

The Reference Types proposal, shipped in V8 v9.6, allows using external references from JavaScript opaquely in WebAssembly modules. The externref (formerly known as anyref) data type provides a secure way of holding a reference to a JavaScript object and is fully integrated with V8's garbage collector.

Few toolchains that already have optional support for reference types are wasm-bindgen for Rust and AssemblyScript.

[hcgaron]

Any update on this? I landed here exactly for the same reason, would love to use the reference types through a CLI arg or api

[protheory8]

Well it seems like the feature is implemented by #937, but it isn't merged yet.