Cargo Features

deno_media_type = { version = "0.1.2", default-features = false, features = ["module_specifier"] }
default = module_specifier

The module_specifier feature is set by default whenever deno_media_type is added without default-features = false somewhere in the dependency tree.

module_specifier default = data-url, url

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features.

data-url module_specifier

With default (std)

url module_specifier