Struct JsFuture 

pub struct JsFuture<T = JsValue> { /* private fields */ }

A Rust Future backed by a JavaScript Promise.

This type is constructed with a JavaScript Promise object and translates it to a Rust Future. This type implements the Future trait from the futures crate and will either succeed or fail depending on what happens with the JavaScript Promise.

Currently this type is constructed with JsFuture::from.

Trait Implementations

impl<T> Debug for JsFuture<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T> ErasableGeneric for JsFuture<T>

type Repr = JsFuture

The singular concrete type that all generic variants can be transmuted on

impl<T: FromWasmAbi + 'static> From<Promise<T>> for JsFuture<T>

fn from(js: Promise<T>) -> JsFuture<T>

Converts to this type from the input type.

impl<T> Future for JsFuture<T>

type Output = Result<T, JsValue>

The type of value produced on completion.

fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output>

Attempts to resolve the future to a final value, registering the current task for wakeup if the value is not yet available.

impl UnwindSafe for JsFuture

impl<T, Target> Upcast<JsFuture<Target>> for JsFuture<T>

where T: Upcast<Target>,

fn upcast(&self) -> &T

where Self: ErasableGeneric, T: Sized + ErasableGeneric<Repr = Self::Repr>,

Perform a zero-cost type-safe upcast to a wider ref type within the Wasm bindgen generics type system.

fn upcast_into(self) -> T

where Self: Sized + ErasableGeneric, T: Sized + ErasableGeneric<Repr = Self::Repr>,

Perform a zero-cost type-safe upcast to a wider type within the Wasm bindgen generics type system.