wasm_bindgen_derive

Function try_from_js_option

Source 
pub fn try_from_js_option<T>(
    val: impl Into<JsValue>,
) -> Result<Option<T>, String>
where
    for<'a> T: TryFrom<&'a JsValue>,
    for<'a> <T as TryFrom<&'a JsValue>>::Error: Display,
Expand description

Attempts to unpack a JS value into a typed value, returning None if the JS value is undefined.