Blazor wasm Localization

Describe the bug

Localization for Blazor wasm does not work correctly, if user uses Blazor + Asp.Net core host + IdentityServer. In documentation for Blazor I found an example for localization in wasm (LocSample). Is this project wasm hasn’t any extra hosts and everything work perfect. In my project I use 4 culture: en, de (or de-DE), fr, ru. Firefox and Edge shows the translation only for en (because it’s standard language from a *.resx file) and russian. Google Chrome shows translation correctly for all languages.

To Reproduce

• VS -> create new project => blazor => wasm + asp.net core hosted + Identity
• Add nuget package “Microsoft.Extensions.Localization - 3.1.3”
• Add in Program.cs to set the culture:

builder.Services.AddLocalization();
var host = builder.Build();
var jsInterop = host.Services.GetRequiredService<IJSRuntime>();
var result = await jsInterop.InvokeAsync<string>("blazorCulture.get");
if (result != null)
{
var culture = new CultureInfo(result);
CultureInfo.DefaultThreadCurrentCulture = culture;
CultureInfo.DefaultThreadCurrentUICulture = culture;
}

• Create some resources for a component: Counter.resx, Counter.de.resx, Counter.ru.resx
• Add code to index.html to store user culture

<script>
   window.blazorCulture = {
     get: () => window.localStorage['BlazorCulture'],
     set: (value) => window.localStorage['BlazorCulture'] = value
   };
 </script>

• Add code to Counter.razor, to select culture and show result

@using  System.Globalization
@inject IJSRuntime JSRuntime
@inject NavigationManager Nav
@inject Microsoft.Extensions.Localization.IStringLocalizer<Counter> Loc
<h1>@Loc["String1"]</h1>
<h1>@Loc["String1"]</h1>
<select @bind="Culture">
  @foreach (var culture in supportedCultures)
  {
    <option value="@culture">@culture.DisplayName</option>
  }
</select>

@code {
  CultureInfo[] supportedCultures = new[]
  {
        new CultureInfo("en"),
        new CultureInfo("de"),
        new CultureInfo("ru"),
    };

  CultureInfo Culture
  {
    get => CultureInfo.CurrentCulture;
    set
    {
      if (CultureInfo.CurrentCulture != value)
      {
        var js = (IJSInProcessRuntime)JSRuntime;
        js.InvokeVoid("blazorCulture.set", value.Name);

        Nav.NavigateTo(Nav.Uri, forceLoad: true);
      }
    }
  }
}

Only Chrome shows right translation.

Code: https://github.com/tj-jyk/BlazorApp4

Further technical details

• Microsoft Windows [Version 10.0.18362.778] (Ru. Pro)

- dotnet --info 
Version:   3.1.201
 Commit:    b1768b4ae7

 OS Name:     Windows
 OS Version:  10.0.18362
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\3.1.201\

Host (useful for support):
  Version: 3.1.3
  Commit:  4a9f85e9f8

.NET Core SDKs installed:
  3.1.100 [C:\Program Files\dotnet\sdk]
  3.1.102 [C:\Program Files\dotnet\sdk]
  3.1.201 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.All 2.1.17 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.1.17 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.3 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 2.1.17 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.3 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 3.1.0 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 3.1.2 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 3.1.3 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

• The IDE (Microsoft Visual Studio Community 2019 16.5.4)

[tj-jyk]

@pranavkm no it was from here https://www.mozilla.org/ru/firefox/download/thanks/

[pranavkm]

Fixed as part of https://github.com/dotnet/aspnetcore/commit/9e412f4c7f0bf6f0e43db27a17bc938c36160f41