Cargo Features

[dependencies]
http-cache-semantics = { version = "2.1.0", default-features = false, features = ["serde", "reqwest"] }
default = serde

The serde feature is set by default whenever http-cache-semantics is added without default-features = false somewhere in the dependency tree.

serde default

Enables http-serde and serde

Features from optional dependencies

reqwest implicit feature

Enables reqwest

reqwest:

higher level HTTP client library