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Optional Route parameters

Indicate that a Route Parameter is optional by appending an ? to it.

In your component’s code/logic, you can then test for null and react accordingly.

@page "/GreetMe/{name?}"
<h1>Hello @resolvedName</h1>

@code {
    [Parameter]
    public string? Name { get; set; }
    private string resolvedName;

    protected override void OnInitialized()
    {
        resolvedName = Name ?? "anonymous";
    }
}