How do I get the page referrer in Blazor?

To get the page referrer of where the user came from, follow these steps:

1. Create a JavaScript function as a separate file in your application (~/wwwroot/interop.js).
   

   function getPageReferrer()
     {
        return document.referrer;
    } 

2. Add the script reference in the ~/wwwroot/index.html file of the Blazor WebAssembly application.
   

    <script src="interop.js"></script> 

3. Invoke the JavaScript function using the IJSRuntime service in a Razor page.
   

    @page "/"
    @inject IJSRuntime JSRuntime
    @code { 
    protected override async Task OnInitializedAsync()
    {
   	var pageReferrer = await JSRuntime.InvokeAsync("getPageReferrer"); 
    }
    }
    
    View Sample in GitHub