Struct Callback

pub struct Callback<E> { /* private fields */ }

Listens for JavaScript callbacks.

This implements the Stream trait; the stream yields callback events.

The new_callback function creates a Callback; go see how it is used.

Trait Implementations

impl<E> Drop for Callback<E>

fn drop(&mut self)

Executes the destructor for this type.

impl<E: JsCast> Stream for Callback<E>

type Item = E

Values yielded by the stream.

fn poll_next( self: Pin<&mut Self>, cx: &mut Context<'_>, ) -> Poll<Option<Self::Item>>

Attempt to pull out the next value of this stream, registering the current task for wakeup if the value is not yet available, and returning None if the stream is exhausted.

fn size_hint(&self) -> (usize, Option<usize>)

Returns the bounds on the remaining length of the stream.