mirror of
https://github.com/rustwasm/wasm-bindgen.git
synced 2024-12-28 12:32:37 +03:00
93 lines
3.3 KiB
Markdown
93 lines
3.3 KiB
Markdown
<meta charset="utf-8"/>
|
|
|
|
# `wasm-bindgen`
|
|
|
|
**Facilitating high-level interactions between wasm modules and JavaScript.**
|
|
|
|
[](https://travis-ci.org/rustwasm/wasm-bindgen)
|
|
[](https://ci.appveyor.com/project/alexcrichton/wasm-bindgen)
|
|
[](https://crates.io/crates/wasm-bindgen)
|
|
[](https://crates.io/crates/wasm-bindgen)
|
|
[](https://docs.rs/wasm-bindgen)
|
|
|
|
Import JavaScript things into Rust and export Rust things to JavaScript.
|
|
|
|
```rust
|
|
extern crate wasm_bindgen;
|
|
use wasm_bindgen::prelude::*;
|
|
|
|
// Import the `window.alert` function from the Web.
|
|
#[wasm_bindgen]
|
|
extern {
|
|
fn alert(s: &str);
|
|
}
|
|
|
|
// Export a `greet` function from Rust to JavaScript, that alerts a
|
|
// hello message.
|
|
#[wasm_bindgen]
|
|
pub fn greet(name: &str) {
|
|
alert(&format!("Hello, {}!", name));
|
|
}
|
|
```
|
|
|
|
Use exported Rust things from JavaScript with ECMAScript modules!
|
|
|
|
```js
|
|
import { greet } from "./hello_world";
|
|
|
|
greet("World!");
|
|
```
|
|
|
|
## Features
|
|
|
|
* **Lightweight.** Only pay for what you use. `wasm-bindgen` only generates
|
|
bindings and glue for the JavaScript imports you actually use and Rust
|
|
functionality that you export. For example, importing and using the
|
|
`document.querySelector` method doesn't cause `Node.prototype.appendChild` or
|
|
`window.alert` to be included in the bindings as well.
|
|
|
|
* **ECMAScript modules.** Just import WebAssembly modules the same way you would
|
|
import JavaScript modules. Future compatible with [WebAssembly modules and
|
|
ECMAScript modules integration][wasm-es-modules].
|
|
|
|
* **Designed with the ["host bindings" proposal][host-bindings] in mind.**
|
|
Eventually, there won't be any JavaScript shims between Rust-generated wasm
|
|
functions and native DOM methods. Because the wasm functions are statically
|
|
type checked, some of those native methods' dynamic type checks should become
|
|
unnecessary, promising to unlock even-faster-than-JavaScript DOM access.
|
|
|
|
[wasm-es-modules]: https://github.com/WebAssembly/esm-integration
|
|
[host-bindings]: https://github.com/WebAssembly/host-bindings/blob/master/proposals/host-bindings/Overview.md
|
|
|
|
## Guide
|
|
|
|
[**📚 Read the `wasm-bindgen` guide here! 📚**](https://rustwasm.github.io/wasm-bindgen)
|
|
|
|
## API Docs
|
|
|
|
- [wasm-bindgen](https://rustwasm.github.io/wasm-bindgen/api/wasm_bindgen/)
|
|
- [js-sys](https://rustwasm.github.io/wasm-bindgen/api/js_sys/)
|
|
- [web-sys](https://rustwasm.github.io/wasm-bindgen/api/web_sys/)
|
|
|
|
## License
|
|
|
|
This project is licensed under either of
|
|
|
|
* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
|
|
http://www.apache.org/licenses/LICENSE-2.0)
|
|
* MIT license ([LICENSE-MIT](LICENSE-MIT) or
|
|
http://opensource.org/licenses/MIT)
|
|
|
|
at your option.
|
|
|
|
## Contribution
|
|
|
|
**[See the "Contributing" section of the guide for information on
|
|
hacking on `wasm-bindgen`!][contributing]**
|
|
|
|
Unless you explicitly state otherwise, any contribution intentionally submitted
|
|
for inclusion in this project by you, as defined in the Apache-2.0 license,
|
|
shall be dual licensed as above, without any additional terms or conditions.
|
|
|
|
[contributing]: https://rustwasm.github.io/wasm-bindgen/contributing/index.html
|