Cargo Features

niftygate-asset has no features set by default.

[dependencies]
niftygate-asset = { version = "0.8.0", features = ["js-runtime"] }
js-runtime = quick-js

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

quick-js js-runtime?