"use of undeclared crate or module `imp`" on getrandom-0.2.3 when building for wasm32-unknown-unknown

[smpurkis]

Hello,

I'm trying to build my learning/toy project/repo (GitHub - smpurkis/numrs: A toy project to implement a basic array library in Rust, as part of learning it.) for wasm32-unknown-unknown.

However, I am getting the error:

error[E0433]: failed to resolve: use of undeclared crate or module `imp`
   --> /home/sam/.cargo/registry/src/github.com-1ecc6299db9ec823/getrandom-0.2.3/src/lib.rs:246:5
    |
246 |     imp::getrandom_inner(dest)
    |     ^^^ use of undeclared crate or module `imp`

From similar issues (see below), it seems it is dependency related. But I can't figure it out.

my Cargo.toml is:

[package]
name = "numrs"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
num-traits = "0.2.14"
rand = "0.8.4"
rayon = "1.5.1"

I've found a few others who have had the same/similar issue:
(upgrade to 3.0) Target not supported: getrandom v0.2.2 · Issue #308 · paritytech/frontier · GitHub - not sure how to follow this fix
Cargo build failing when combining two dependencies - solved by new resolver, which I believe is now the default, so this doesn't fix my issue

and I found some other resources that talk about it:

getrandom - Rust

However, I am unsure how to fix this issue.
Any help would be much appreciated!

[Michael-F-Bryan]

If you are planning to run this in the browser, do their instructions under the Indirect Dependencies section work?

Indirect Dependencies

If getrandom is not a direct dependency of your crate, you can still enable any of the above fallback behaviors by enabling the relevant feature in your root crate’s Cargo.toml :

[dependencies]
getrandom = { version = "0.2", features = ["js"] }

[smpurkis]

Can't believe I missed that!
Worked like a charm, thank you!