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Contents
# `readonly`
When attached to a `pub` struct field this indicates that it's read-only from
JavaScript, and a setter will not be generated and exported to JavaScript.
```rust
#[wasm_bindgen]
pub fn make_foo() -> Foo {
Foo {
first: 10,
second: 20,
}
}
#[wasm_bindgen]
pub struct Foo {
pub first: u32,
#[wasm_bindgen(readonly)]
pub second: u32,
}
```
Here the `first` field will be both readable and writable from JS, but the
`second` field will be a `readonly` field in JS where the setter isn't
implemented and attempting to set it will throw an exception.
```js
import { make_foo } from "./my_module";
const foo = make_foo();
// Can both get and set `first`.
foo.first = 99;
console.log(foo.first);
// Can only get `second`.
console.log(foo.second);
```
Version data entries
30 entries across 30 versions & 1 rubygems