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javascriptdebuggingblazorblazor-server-sidemudblazor

blazor after visual studio update throws some strange JS warnings

After update visual studio to 17.11.3, in almost every file that i opened with visual studio threw some warning:

Severity    Code    Description Project File    Line    Suppression State
Warning (active)    TS1109  (JS) Expression expected.   Miscellaneous   D:\xxx\Components\Core\DialogConfirmComponent.razor__virtual.html__virtual.js   9

As on screen

enter image description here

Is it some .net bug ? or i should do something with it? no idea what it is this _virtual.html_virtual.js? guess some temp file?

before update there was no such things...?

thanks and regards

Edit:

Minimal Reproducible Example

  1. Have 17.11.3 Visual Studio
  2. Dotnet new install MudBlazor.Templates
  3. New project - MudBlazor Web APP (server rendering mode / global)
  4. Open counter component. delete all.
  5. Paste into this counter component
    <MudButton Variant="Variant.Filled" Color="Color.Primary" DropShadow="false" OnClick="@(()=>blabla())">Validate</MudButton>
@code {

    public void blabla()
    {
        
    }

}
  1. Save and see the warnings
Solution

  • ok i found it for future searchers

    from version of visual studio 17.11.3

    OnClick="@(async () => await Validate())">

    i causing this isasue

    @onclick="@(async () => await Validate())"> or @onclick="Validate"

    is not throwing it.

    but the OnClick should also work as it is part of the api https://mudblazor.com/api/button#properties

    please if someone known - why this is throwing it now? i added minimal example in first post/question

    i downgraded to visual studio 17.10.5 and NO WARNINGS so issue is only in 17.11.3.

    so it is issue with VS i opened case for them

    https://github.com/dotnet/razor/issues/10896