Cargo Features

check-if-email-exists has no features set by default.

[dependencies]
check-if-email-exists = { version = "0.9.1", features = ["headless"] }
headless = fantoccini, futures

Affects outlook::hotmail, input_output::CheckEmailInput.hotmail_use_headless

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.

fantoccini headless?
futures headless?