---
title: Show API docs
description: All the API docs of Show
---

# Show API docs

Conditionally render its __builder__ or an optional __fallback__ component based on the __when__ evaluation.

```dart
final loggedIn = Signal(false);

@override
Widget build(BuildContext context) {
  return Show(
    when: loggedIn,
    builder: (context) => const Text('Logged In'),
    fallback: (context) => const Text('Logged out'),
  );
}
```

## Constructor

```dart
Show({
  bool Function()? when,
  WidgetBuilder builder,
  WidgetBuilder? fallback,
});
```

A boolean Signal used to determine which builder needs to be used.

When the Signal's value is true, renders the __builder__, otherwise the __fallback__ (if provided, or an empty view).

---

The `Show` widget takes a functions that returns a `bool`.
You can easily convert any type to `bool`, for example:

```dart
final count = Signal(0);

@override
Widget build(BuildContext context) {
  return Show(
    when: () => count() > 5,
    builder: (context) => const Text('Count is greater than 5'),
    fallback: (context) => const Text('Count is lower than 6'),
  );
}
```