Cargo Features

[dependencies]
js_int = { version = "0.2.2", default-features = false, features = ["std", "float_deserialize", "lax_deserialize"] }
default = std

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

std default
float_deserialize lax_deserialize? = serde
lax_deserialize = float_deserialize

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 float_deserialize?