<InputText @bind-Value="employee.FirstName" />

[Parameter] public string Value { set; get; }

[Parameter] public EventCallback<string> ValueChanged { get; set; }

[Parameter] public Action<string> ValueChanged { get; set; }

[Parameter] public Expression<Func<string>> ValueExpression { get; set; }

{
  "compilerOptions": {
    "strict": true,
    "removeComments": false,
    "sourceMap": false,
    "noEmitOnError": true,
    "target": "ES2020",
    "module": "ES2020",
    "outDir": "wwwroot/scripts"
  },
  "include": [
    "Scripts/**/*.ts"
  ],
  "exclude": [
    "node_modules"
  ]
}

<Project Sdk="Microsoft.NET.Sdk.Razor">
  <ItemGroup>
    <PackageReference Include="Microsoft.TypeScript.MSBuild" Version="4.3.5">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
  </ItemGroup>
  <ItemGroup>
    <Content Remove="tsconfig.json" />
  </ItemGroup>
  <ItemGroup>
    <TypeScriptCompile Include="tsconfig.json">
      <CopyToOutputDirectory>Never</CopyToOutputDirectory>
    </TypeScriptCompile>
  </ItemGroup>
</Project>

window.exampleJsFunctions = {
  showPrompt: function (message) {
    return prompt(message, 'Type anything here');
  }
};

namespace JSInteropWithTypeScript {
   export class ExampleJsFunctions {
        public showPrompt(message: string): string {
            return prompt(message, 'Type anything here');
        }
    }
}

export function showPrompt(message: string): string {
   var fns = new JSInteropWithTypeScript. ExampleJsFunctions();
   return fns.showPrompt(message);
}

private const string ScriptPath = "./_content/----namespace-here---/scripts/file.js";
private IJSObjectReference scriptModule;

protected override async Task OnAfterRenderAsync(bool firstRender)
{
  if (scriptModule == null)
    scriptModule = await JSRuntime.InvokeAsync<IJSObjectReference>("import", ScriptPath);

await scriptModule.InvokeVoidAsync("exported fn name", params);

public partial class MyComponent : IAsyncDisposable

public async ValueTask DisposeAsync()
{
  if (scriptModule != null)
  {
    await scriptModule.DisposeAsync();
  }
}

public int GetRandomNumber() => RandomNumberGenerator.GetInt32(1, 1000000);