When will transparency come out.

[Hunlongyu]

Transparency level setting opacity: number.

[danidre14]

It was planned for 2021 and currently is now planned for 2022, but honestly, it might not come about in the near future. This is because Neu heavily relies on webview (a cross platform library to running...a webview) and if you check their github, since 2017 they have been trying to get transparent backgrounds but have been unable to on all platforms and thus have not implemented it fully yet.
webview/webview#25 (its left as "help wanted")

[prashantkr006]

hello @danidre14 I was looking for participating in GSOC 2022 and I saw this project and I found it interesting and somehow similar to the tech stack I work on, in GSOC readme I saw this project idea and the attached link dropped me here to this issue, I would like to work on this opacity feature.

[danidre14]

Hi @prashantkr006

If you haven't already, join the discord and get acquainted with everyone and you can further discuss your options there!

[coldino]

On Windows this is certainly already possible when working directly with WebView2. An old test project I made to overlay Twitch chat over games has a very simple WPF wrapper and works well:

<Window x:Class="BrowserOverlay.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:wpf="clr-namespace:Microsoft.Web.WebView2.Wpf;assembly=Microsoft.Web.WebView2.Wpf"
        AllowsTransparency="True" Background="Transparent"
        Topmost="True" WindowStyle="None" Title="MainWindow" Width="600" Height="480">
    <Grid>
        <wpf:WebView2 x:Name="webView" DefaultBackgroundColor="Transparent"/>
    </Grid>
</Window>

Sure, this is WPF, but it shows it is very much achievable.

Unfortunately I have no knowledge about the viability on Linux or Mac.

[riffly]

I would like to try,, please assign me