Radix

MCPSearch({ query: "select:mcp__plugin_devtools_context7__query-docs" })

// Radix primitives
mcp__context7__query_docs({
  context7CompatibleLibraryID: "/radix-ui/primitives",
  topic: "Dialog Trigger Content"
})

// Form controls
mcp__context7__query_docs({
  context7CompatibleLibraryID: "/radix-ui/primitives",
  topic: "Select Checkbox RadioGroup"
})

// Accessibility
mcp__context7__query_docs({
  context7CompatibleLibraryID: "/radix-ui/primitives",
  topic: "accessibility aria keyboard"
})

import * as Dialog from "@radix-ui/react-dialog";

function MyDialog() {
  return (
    <Dialog.Root>
      <Dialog.Trigger asChild>
        <button>Open Dialog</button>
      </Dialog.Trigger>
      <Dialog.Portal>
        <Dialog.Overlay className="fixed inset-0 bg-black/50" />
        <Dialog.Content className="fixed top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 bg-white p-6 rounded-lg">
          <Dialog.Title>Dialog Title</Dialog.Title>
          <Dialog.Description>Dialog description.</Dialog.Description>
          <Dialog.Close asChild>
            <button>Close</button>
          </Dialog.Close>
        </Dialog.Content>
      </Dialog.Portal>
    </Dialog.Root>
  );
}

Dropdown Menu:

import * as DropdownMenu from "@radix-ui/react-dropdown-menu";

function MyDropdown() {
  return (
    <DropdownMenu.Root>
      <DropdownMenu.Trigger asChild>
        <button>Options</button>
      </DropdownMenu.Trigger>
      <DropdownMenu.Portal>
        <DropdownMenu.Content className="bg-white rounded-md shadow-lg p-1">
          <DropdownMenu.Item className="px-2 py-1 cursor-pointer hover:bg-gray-100">
            Edit
          </DropdownMenu.Item>
          <DropdownMenu.Item className="px-2 py-1 cursor-pointer hover:bg-gray-100">
            Delete
          </DropdownMenu.Item>
          <DropdownMenu.Separator className="h-px bg-gray-200 my-1" />
          <DropdownMenu.Item className="px-2 py-1 cursor-pointer hover:bg-gray-100">
            Settings
          </DropdownMenu.Item>
        </DropdownMenu.Content>
      </DropdownMenu.Portal>
    </DropdownMenu.Root>
  );
}

Select:

import * as Select from "@radix-ui/react-select";

function MySelect() {
  return (
    <Select.Root>
      <Select.Trigger className="border px-3 py-2 rounded">
        <Select.Value placeholder="Select option" />
        <Select.Icon />
      </Select.Trigger>
      <Select.Portal>
        <Select.Content className="bg-white border rounded shadow-lg">
          <Select.Viewport>
            <Select.Item value="1" className="px-3 py-2 hover:bg-gray-100">
              <Select.ItemText>Option 1</Select.ItemText>
            </Select.Item>
            <Select.Item value="2" className="px-3 py-2 hover:bg-gray-100">
              <Select.ItemText>Option 2</Select.ItemText>
            </Select.Item>
          </Select.Viewport>
        </Select.Content>
      </Select.Portal>
    </Select.Root>
  );
}

const [open, setOpen] = useState(false);

<Dialog.Root open={open}
  {/* ... */}
</Dialog.Root>

asChild pattern:

// Radix renders YOUR button, not its own
<Dialog.Trigger asChild>
  <Button variant="primary">Open</Button>
</Dialog.Trigger>

Portal for proper stacking:

<Dialog.Portal>
  <Dialog.Overlay />
  <Dialog.Content>
    {/* Content renders outside parent DOM */}
  </Dialog.Content>
</Dialog.Portal>

Forwarding refs:

const MyTrigger = forwardRef((props, ref) => (
  <button ref={ref} {...props}>
    Custom Trigger
  </button>
));

<Dialog.Trigger asChild>
  <MyTrigger />
</Dialog.Trigger>

Accessibility:

• Always include Title for dialogs
• Use Description for additional context
• Test with keyboard navigation
• Test with screen readers