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

# Provider API docs

A Provider that manages the lifecycle of the value it provides by delegating to a pair of [create] and [dispose].

It is usually used to avoid making a StatefulWidget for something trivial,
such as instantiating a BLoC.

## Constructor

```dart
Provider({
  required T Function() create,
  DisposeValue<T>? dispose,
  bool lazy = true,
  Object? id,
})
```

Provider is the equivalent of a State.initState combined with State.dispose.
`create` is called only once in State.initState.
The `create` callback is lazily called. It is called the first time the
value is read, instead of the first time Provider is inserted in the widget
tree.
This behavior can be disabled by passing `lazy` false.

You can pass an optional `id` to have multiple providers of the same type.

The `dispose` method will not be called if the provider is a `SignalBase`,
because they are disposed automatically when there aren't any subscribers.