Attribute Macro wasm_export 

#[wasm_export]

Attribute macro for impl blocks containing WASM bindings.

Methods within the impl block can be marked with #[wasm_only] to indicate they are intended only for JavaScript consumers via wasm_bindgen, not for direct Rust usage.

For each #[wasm_only] method, the macro:

• Renames it with a __wasm_only_ prefix (e.g. subscribe -> __wasm_only_subscribe)
• Adds #[wasm_bindgen(js_name = "subscribe")] to preserve the JS API (if no js_name is already set)
• Adds #[doc(hidden)] to hide it from Rust documentation
• Adds #[deprecated] so it shows with strikethrough in IDE autocomplete

This must be placed before (above) the #[wasm_bindgen] attribute so it expands first.

Example

#[wasm_export]
#[wasm_bindgen(js_class = IpcClient)]
impl JsIpcClient {
    // Left as-is: Rust code may need to construct this type
    #[wasm_bindgen(js_name = newWithSdkInMemorySessions)]
    pub fn new_with_sdk_in_memory_sessions(...) -> JsIpcClient { ... }

    // Mangled: Rust consumers should use the inner client directly
    #[wasm_only]
    pub async fn subscribe(&self) -> Result<JsIpcClientSubscription, SubscribeError> { ... }
}