@inject NavigationManager NavManager
@inject IJSRuntime JsRuntime

<div class="container-fluid fixed-top pt-5">

    <div class="row">
        <div class="col-1">
            <DxButton Click="() => GoBack()"><i class="fa-solid fa-chevron-left"></i></DxButton>
        </div>
        <div class="col-10"></div>
        <div class="col-1">
        </div>

    </div>
</div>

<script>
    window.historyHelper = {
        getPreviousUrl: function () {
            return document.referrer;
        }
    };
</script>

@code {

    private string _previousUrl;

    protected override async Task OnInitializedAsync()
    {
        _previousUrl = await JsRuntime.InvokeAsync<string>("historyHelper.getPreviousUrl");
        Console.Write("");
    }

    private void GoBack()
    {
        if (!string.IsNullOrEmpty(_previousUrl) && _previousUrl != NavManager.Uri)
        {
            NavManager.NavigateTo(_previousUrl);
        }
        else
        {
            NavManager.NavigateTo("/");
        }
    }
}