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Contents
# Importing non-browser JS
[View full source code][code] or [view the compiled example online][online]
[online]: https://rustwasm.github.io/wasm-bindgen/exbuild/import_js/
[code]: https://github.com/rustwasm/wasm-bindgen/tree/master/examples/import_js
The `#[wasm_bindgen]` attribute can be used on `extern "C" { .. }` blocks to import
functionality from JS. This is how the `js-sys` and the `web-sys` crates are
built, but you can also use it in your own crate!
For example if you're working with this JS file:
```js
// defined-in-js.js
{{#include ../../../examples/import_js/crate/defined-in-js.js}}
```
you can use it in Rust with:
```rust
{{#include ../../../examples/import_js/crate/src/lib.rs}}
```
You can also [explore the full list of ways to configure imports][attr]
[attr]: ../reference/attributes/on-js-imports/index.html
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