Web-Development-with-Blazor-Second-Edition/Chapter12/MyBlog/BlazorWebAssembly/Client/JSInteropSamples/NetToJS.razor

@page "/nettojswasm"
@using System.Runtime.InteropServices.JavaScript

<h3>This is a demo how to call JavaScript from .NET</h3>

<button @onclick="ShowAlert">Show Alert</button>
@code {
    protected async void ShowAlert()
    {
        ShowAlert("Hello from .NET");
    }

    protected override async Task OnInitializedAsync()
    {
        await JSHost.ImportAsync("nettojs", "../JSInteropSamples/NetToJS.razor.js");
    }
}