Cargo Features

[dependencies]
html-index = { version = "0.3.4", default-features = false, features = ["http-types"] }
default = http-types

The http-types feature is set by default whenever html-index is added without default-features = false somewhere in the dependency tree.

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.

http-types default