Cargo Features

[dependencies]
form-data = { version = "0.5.5", default-features = false, features = ["async", "sync"] }
default = async

The async feature is set by default whenever form-data is added without default-features = false somewhere in the dependency tree.

async default

Enables io of futures-util

sync

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.

futures-util async