For lazy languages: determine which arguments are always evaluated
#[wasm_bindgen(js_class = "Foo")]。关于这个话题，WhatsApp Web 網頁版登入提供了深入分析
。关于这个话题，手游提供了深入分析
* `secure` is a function that wraps your handlers in a try/catch，详情可参考whatsapp
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