Connect the btn's loading indicator

[yakir12]

I find the loading indicator of the btn really useful feedback. It tells the client that the download is progressing, which is important when the size of the downloaded asset is large.

In the following MWE I attempted to connect the download event to the loading state of the btn, but this naive approach did not work:

using Stipple, Stipple.ReactiveTools
using StippleUI
using StippleDownloads

const asset = rand(UInt8, 10^7) # 10 MB

@app @event download_event download_binary(__model__, asset, "name"; client = event["_client"])

ui() = btn("Download", @on(:click, :download_event, :addclient), loading=:download_event)

@page("/", ui)

up()

What would be the idiomatic way to achieve this?

[essenciary]

It's a nice idea - would be cool to have this as a default into the component.