Crate web_task 

This crate is a modern alternative to web-bindgen-futures built around async-task.

Pros & Cons

Pros:

• Provides both spawn (for Send futures) and spawn_local (for !Send futures).
• spawn and spawn_local return Task<T> futures, which resolve to return values.
• It’s possible to cancel futures using task handles.
• Non-send futures (which are common on web) can have send task-handles.

Cons:

• Some older browser versions are not supported.

Runtime Support

Enabling the +atomics nightly target feature automatically switches the crate to a multithreaded runtime, which may have different performance characteristics.

Functions

spawn

Spawns a Future<Output = T> that can execute on any thread; returns a Task.

spawn_local

Spawns a Future<Output = T> that executes on the current thread; returns a Task.