cargo install cargo-feature
nix-env -iA nixos.cargo-feature
paru -S cargo-feature
```
cargo feature -t build serde +serde_derive
cargo feature serde ^default
cargo feature serde --disable-default-features
cargo feature serde default
cargo feature serde --enable-default-features
cargo feature web_sys +HtmlDivElement
cargo feature web_sys HtmlDivElement
cargo feature web_sys ^HtmlDivElement ```