Cargo Features

[dependencies]
crb = { version = "0.0.31", default-features = false, features = ["std", "web"] }
default = std

The std feature is set by default whenever crb is added without default-features = false somewhere in the dependency tree.

std default

Enables std of crb-core and crb-runtime

web

Enables web of crb-core and crb-runtime

CRB has 3 features without comments.