Cargo Features

[dependencies]
slack-chat-api = { version = "0.7.0", default-features = false, features = ["httpcache", "native-tls", "rustls-tls"] }
default = rustls-tls

The rustls-tls feature is set by default whenever slack-chat-api is added without default-features = false somewhere in the dependency tree.

httpcache = dirs

enable etag-based http_cache functionality

native-tls = openssl

Enables default-tls of reqwest ^0.11.14

reqwest:

Note: this doesn't enable the 'native-tls' feature, which adds specific functionality for it.

rustls-tls default = pem, ring

Enables rustls-tls of reqwest ^0.11.14

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.

dirs httpcache?

Enables dirs ^3.0.2

openssl native-tls?
pem rustls-tls

Enables pem ^1.1.0

ring rustls-tls

Enables ring ^0.16