Cargo Features

[dependencies]
swc_node_bundler = { version = "5.0.0", default-features = false, features = ["serde-impl", "swc_v1", "swc_v2"] }
default = swc_v1

The swc_v1 feature is set by default whenever swc_node_bundler is added without default-features = false somewhere in the dependency tree.

serde-impl swc_v1 swc_v2? = serde
swc_v1 default = serde-impl

Affects swc_node_bundler::v1

swc_v2 = serde-impl

Affects swc_node_bundler::v2

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.

serde serde-impl?