radzen-blazor/Radzen.Blazor/RadzenMenuItemWrapper.razor

@using Microsoft.AspNetCore.Components.Routing
@using Microsoft.AspNetCore.Components.Web
@using Microsoft.JSInterop
@inherits RadzenComponentWithChildren

@if (Item?.Parent?.ClickToOpen == true)
{
    <li style=@Style @attributes="@Attributes" @onclick="@Item.OnClick" @onclick:stopPropagation role="menuitem"
        tabindex="@(Item?.Disabled == true ? -1 : 0)" aria-disabled="@(Item?.Disabled == true ? "true" : "false")"
        aria-haspopup="@(Item?.ChildContent != null ? "menu" : null)"
        aria-controls="@Item?.SubmenuId"
        aria-expanded="@(Item?.ChildContent != null ? "false" : null)"
        @onkeydown="OnKeyDown">
        @ChildContent
    </li>
}
else
{
    if (Item?.ChildContent != null)
    {
        <li style=@Style @attributes="@Attributes"
            role="menuitem" tabindex="@(Item?.Disabled == true ? -1 : 0)" aria-disabled="@(Item?.Disabled == true ? "true" : "false")"
            aria-haspopup="menu" aria-controls="@Item?.SubmenuId" aria-expanded="false" @onkeydown="OnKeyDown">
            @ChildContent
        </li>
    }
    else
    {
        <li style=@Style @attributes="@Attributes" @onclick="@(Item!.OnClick)" @onclick:stopPropagation role="menuitem"
            tabindex="@(Item?.Disabled == true ? -1 : 0)" aria-disabled="@(Item?.Disabled == true ? "true" : "false")"
            aria-haspopup="@(Item?.ChildContent != null ? "menu" : null)"
            aria-controls="@Item?.SubmenuId"
            aria-expanded="@(Item?.ChildContent != null ? "false" : null)"
            @onkeydown="OnKeyDown">
            @ChildContent
        </li>
    }
}

@code {

    /// <summary>
    /// Gets or sets the menu item.
    /// </summary>
    /// <value>The menu item.</value>
    [Parameter]
    public RadzenMenuItem? Item { get; set; }

    async Task OnKeyDown(KeyboardEventArgs args)
    {
        if (Item == null || Item.Disabled)
        {
            return;
        }

        var key = args.Code != null ? args.Code : args.Key;
        if (key == "Enter" || key == "Space")
        {
            if (Item.ChildContent != null)
            {
                await Item.Toggle();
            }
            else
            {
                await Item.OnClick(new MouseEventArgs());
            }
        }
    }
}