@if (_isRunning)
{
    @ChildContent
}
else
{
    <h1 class="loading">Dev Ejection Seat Working</h1>
}

@code
{
    [Parameter]
    public RenderFragment? ChildContent { get; set; }

    private IJSObjectReference? module;

    private bool _isRunning = true;

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        await base.OnAfterRenderAsync(firstRender);
        if (firstRender == false) return;
        module = await JS.InvokeAsync<IJSObjectReference>("import", "./Gui/Blazor/DevEjectionSeat.razor.js");
        await module.InvokeVoidAsync("SetBeforeUnloadEventHandler", DotNetObjectReference.Create(this), nameof(BeforeUnloadEventHandler));
    }

    [JSInvokable]
    public void BeforeUnloadEventHandler()
    {
        if (_isRunning == false) return;
        _isRunning = false;
        StateHasChanged();
    }
}