Cargo Features

[dependencies]
assets = { version = "0.3.0", default-features = false, features = ["image", "json"] }
default = image, json

These default features are set whenever assets is added without default-features = false somewhere in the dependency tree.

image default = imagefmt
json default = serde, serde_derive, serde_json

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.

imagefmt image
serde json
serde_derive json
serde_json json