test/ui/VitalsPanel.razor
@using Sandbox;
@using Sandbox.UI;
@inherits Panel
@namespace Sandbox

<root>
	@* <div class="armor">
		<label>SH: 100</label>
	</div> *@
	<div class="health">
		<label>HP: @(Player.FindLocalPlayer()?.Health.CeilToInt() ?? 0)</label>
		@* <label class="armor">+100</label> *@
	</div>
</root>

@code
{
	protected override int BuildHash() => System.HashCode.Combine( Player.FindLocalPlayer()?.Health );
}