# winit - Cross-platform window creation and management in Rust
[](https://crates.io/crates/winit)
[](https://docs.rs/winit)
[](https://travis-ci.org/rust-windowing/winit)
[](https://ci.appveyor.com/project/Osspial/winit/branch/master)
```toml
[dependencies]
winit = "0.20.0-alpha5"
```
## [Documentation](https://docs.rs/winit)
For features _within_ the scope of winit, see [FEATURES.md](FEATURES.md).
For features _outside_ the scope of winit, see [Missing features provided by other crates](https://github.com/rust-windowing/winit/wiki/Missing-features-provided-by-other-crates) in the wiki.
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## Usage
Winit is a window creation and management library. It can create windows and lets you handle
events (for example: the window being resized, a key being pressed, a mouse movement, etc.)
produced by window.
Winit is designed to be a low-level brick in a hierarchy of libraries. Consequently, in order to
show something on the window you need to use the platform-specific getters provided by winit, or
another library.
```rust
use winit::{
event::{Event, WindowEvent},
event_loop::{ControlFlow, EventLoop},
window::WindowBuilder,
};
fn main() {
let event_loop = EventLoop::new();
let window = WindowBuilder::new().build(&event_loop).unwrap();
event_loop.run(move |event, _, control_flow| {
match event {
Event::WindowEvent {
event: WindowEvent::CloseRequested,
window_id,
} if window_id == window.id() => *control_flow = ControlFlow::Exit,
_ => *control_flow = ControlFlow::Wait,
}
});
}
```
Winit is only officially supported on the latest stable version of the Rust compiler.
### Cargo Features
Winit provides the following features, which can be enabled in your `Cargo.toml` file:
* `serde`: Enables serialization/deserialization of certain types with [Serde](https://crates.io/crates/serde).
### Platform-specific usage
#### WebAssembly
Building a binary will yield a `.js` file. In order to use it in an HTML file, you need to:
- Put a `` element somewhere. A canvas corresponds to a winit "window".
- Write a Javascript code that creates a global variable named `Module`. Set `Module.canvas` to
the element of the `