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19 lines
368 B
Markdown
19 lines
368 B
Markdown
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# Error handling for imported Javascript methods
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Javascript methods that throw can be imported in Rust like this:
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```javascript
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window.throwsIfPair = (num) => {
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if (num % 2 === 0) throw new Error("Pair number");
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return num;
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};
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```
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```rust
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#[wasm_bindgen]
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extern "C" {
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#[wasm_bindgen(catch)]
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pub fn throwsIfPair(text: i32) -> Result<i32, JsValue>;
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}
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```
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