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# typescript_type
The `typescript_type` allows us to use typescript declarations in `typescript_custom_section` as arguments for rust functions! For example:
```rust
#[wasm_bindgen(typescript_custom_section)]
const ITEXT_STYLE: &'static str = r#"
interface ITextStyle {
bold: boolean;
italic: boolean;
size: number;
}
"#;
#[wasm_bindgen]
extern "C" {
#[wasm_bindgen(typescript_type = "ITextStyle")]
pub type ITextStyle;
}
#[wasm_bindgen]
#[derive(Default)]
pub struct TextStyle {
pub bold: bool,
pub italic: bool,
pub size: i32,
}
#[wasm_bindgen]
impl TextStyle {
#[wasm_bindgen(constructor)]
pub fn new(i: ITextStyle) -> TextStyle {
let _js_value: JsValue = i.into();
// parse JsValue
TextStyle::default()
}
pub fn optional_new(_i: Option<ITextStyle>) -> TextStyle {
// parse JsValue
TextStyle::default()
}
}
```
We can write our `typescript` code like:
```ts
import { ITextStyle, TextStyle } from "./my_awesome_module";
const style: TextStyle = new TextStyle({
bold: true,
italic: true,
size: 42,
});
const optional_style: TextStyle = TextStyle.optional_new();
```
Version data entries
16 entries across 16 versions & 1 rubygems