Cargo Features

iofs has no features set by default.

[dependencies]
iofs = { version = "0.0.8", features = ["web_warp"] }
web_warp = url, warp

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.

url web_warp?
warp web_warp?