This crate is part of the [`zng`](https://github.com/zng-ui/zng?tab=readme-ov-file#crates) project.
## Cargo Features
This crate provides 3 feature flags, 1 enabled by default.
#### `"multi_app"`
Allows multiple app instances per-process.
This feature allows multiple apps, one app per thread at a time. The `LocalContext` tracks
what app is currently running in each thread and `app_local!` statics switch to the value of each app
depending on the current thread.
#### `"debug_default"`
Enable `"multi_app"` in debug builds.
*Enabled by default.*
#### `"dyn_closure"`
Box closures at opportune places, such as `Var::map`, reducing the number of monomorphised types.
This speeds-up compilation time at the cost of runtime.