Readme update and NullReferenceException

[hannespreishuber]

try to get it run with 3.0 final
protected override async Task OnInitAsync()
should be in readme.md
protected override async Task OnInitializedAsync()

but at this point I get a
NullReferenceException: Object reference not set to an instance of an object.
Microsoft.AspNetCore.Components.Server.Circuits.RemoteJSRuntime.BeginInvokeJS(long asyncHandle, string identifier, string argsJson)
Microsoft.JSInterop.JSRuntime.InvokeAsync(string identifier, CancellationToken cancellationToken, object[] args)
Microsoft.JSInterop.JSRuntime.InvokeWithDefaultCancellation(string identifier, object[] args)
System.Threading.Tasks.ValueTask.get_Result()
System.Runtime.CompilerServices.ValueTaskAwaiter.GetResult()
AspNetMonsters.Blazor.Geolocation.LocationService.GetLocationAsync() in LocationService.cs
+
var result = await jSRuntime.InvokeAsync("AspNetMonsters.Blazor.Geolocation.GetLocation", requestId);
UseGeo.Pages.Index.OnInitializedAsync() in Index.razor
+
location = await LocationService.GetLocationAsync();

[aleksandar-smilevski]

Hi @hannespreishuber,

I ran into a similar (the same) issue, when trying to read the location of the user using the LocationService. This is the error in the console:

I found a workaround by copying the Location.js in the wwwroot of my application

Blazor.Geolocation/AspNetMonsters.Blazor.Geolocation/wwwroot/Location.js

Line 1 in 9a7ab1b

"use strict";

And then referencing it in my index.html or _Host.cshtml (if you're using Blazor Server Side).

However, I think when installing the NuGet package the file should be copied to your wwwroot.

Hope that helps :)

P.S. I am a Blazor novice and someone more experienced may give better advice. I am just sharing what fixed my issue