I think your current code is enough, but if you want to use useMemoized I suggest this.
final future = useMemoized(SharedPreferences.getInstance);
final snapshot = useFuture(future, initialData: null);
useEffect(() {
final preferences = snapshot.data;
if (preferences == null) {
return;
}
preferences.getBool('');
}, [snapshot.data]);
Pub.dev
pub.dev › documentation › flutter_hooks › latest › flutter_hooks › useEffect.html
useEffect function - flutter_hooks library - Dart API
By default effect is called on every build call, unless keys is specified. In which case, effect is called once on the first useEffect call and whenever something within keys change/
Videos
07:15
Flutter Hooks - 07 useEffect - parte 1 - YouTube
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Flutter Hooks - 08 useEffect - parte 2 - YouTube
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Write Less Code with Flutter Hooks | Learn Flutter Fast - YouTube
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Flutter Hooks - Say Goodbye To Stateful Widget - YouTube
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Learn Flutter Hooks and Maximize Your Code Reuse - YouTube
Devtrium
devtrium.com › posts › async-functions-useeffect
How to use async functions in useEffect (with examples) - Devtrium
August 14, 2021 - So how should you use the result of asynchronous code inside a useEffect? Inside the fetch data function!
Top answer 1 of 3
22
The issue with:
useEffect(() {
model.fetchList();
}, []);
is that fetchList is called synchronously inside build and modify an ancestor widget, which is not good.
You can wrap the fetchList call in a microtask:
useEffect(() {
Future.microtask(() => model.fetchList());
}, []);
2 of 3
7
I know this question is old. But I hope my answer can help someone. I solved the problem by making the function call in the next frame
useEffect(() {
WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
model.fetchList();
}
}, []);
GitHub
github.com › rrousselGit › flutter_hooks › issues › 63
why is the implementation of useEffect different from React hooks useEffect? · Issue #63 · rrousselGit/flutter_hooks
March 20, 2019 - The function passed to useEffect will run after the render is committed to the screen. Flutter hooks synchronously executes the function which will lead in a different result as expected (coming from react hooks).
Author smiLLe
Medium
medium.com › @yousafjamil50 › useeffect-hook-in-flutter-76d9d78ed399
useEffect hook in Flutter
July 11, 2024 - Explanation: The useEffect hook fetches data from the API when the widget is first rendered. The fetched data is stored in a state variable and displayed in a ListView. ... In this example, we’ll react to changes in a dependency. import ...
YouTube
youtube.com › amplifyabhi coding
Flutter : Hooks -- useState() | useEffect() | amplifyabhi - YouTube
#usestate #hooksFlutter hooks makes it easy to use lifecycle components for widgets.Flutter life cycle components: createStatemounted trueinitStatedidChangeD...
Published May 2, 2022 Views 3K
GitHub
github.com › rrousselGit › flutter_hooks › issues › 153
useEffect hook not working properly. · Issue #153 · rrousselGit/flutter_hooks
July 12, 2020 - In React, useEffect hook works after first build. Bu in flutter_hooks, useEffect works before first render. That's why, make an operation with context object on useEffect(() { //operation using context }, []) makes following error: Cannot listen to inherited widgets inside HookState.initState.
Author alirashid18
Medium
medium.com › @mustafatahirhussein › understanding-flutter-hooks-concept-two-examples-a229c5b07102
Understanding Flutter Hooks - Concept | Two examples | by Mustafa Tahir | Medium
August 19, 2022 - The concept of Hook was first introduced in React Programming and then the same approach was grabbed by Flutter itself. You may be having a bucket of questions surrounding the usage of this feature. Well, this article will surely guide you in implementing this one.
Turing
turing.com › kb › code-reuse-maximization-with-flutter-hooks
Maximizing Your Code Reuse With Flutter Hooks
With the help of the flutter_hooks library, we will get a robust way to manage the lifecycle of widgets by increasing code-sharing and reducing code duplication. ... useValueChanged hook will watch a value and help you with summoning a callback when there is a change in the value ... We will use the useEffect hook for redirecting it after some time and the useAnimationController hook for creating an instance of the AnimationController.
Top answer 1 of 2
1
you should use useEffect and useState for HookWidget is best as per my suggestion
2 of 2
0
useEffect -> when you want an effect (callback, listening other objects, more reactive stuff)
useMemoized -> expensive calculations that don't change that much (color based on a bool input and some other data, math, generate list based on other values)
useRef -> Creates an instance of an object as a reference and holds it until the widget is disposed (for example a http instance, you only want one for other things in your widget)
Medium
medium.com › @iamsureshsharma › overview-of-flutter-hooks-62b93eb721d9
Overview of Flutter Hooks
November 16, 2022 - This is a simple implementation of useEffect(), using Timer
DEV Community
dev.to › jasmin › how-to-use-async-function-in-useeffect-5efc
How to use async function in useEffect? - DEV Community
June 20, 2022 - In this case we need to wrap our async function in useCallback to map it with dependency array. Note - If we do not wrap the function using useCallback hook it will re-render on every update which will result in triggering the useEffect hook again.
Mobikul
mobikul.com › home › flutter hooks
Flutter Hooks - Mobikul
February 20, 2025 - Learn more about state management in flutter. useEffect method helps to remove boiler plate code of statefulWidget we can use this as shown below :
Arhaminfo
arhaminfo.com › home › app responsiveness › unlocking efficiency: navigating asynchronous operations in flutter and react
Unlocking Efficiency: Navigating Asynchronous Operations in Flutter and React
November 20, 2025 - This pattern is the bread and butter of data fetching in React. We explicitly manage the `loading`, `error`, and `data` states, and use a `useEffect` hook to trigger the asynchronous side effect.
GitHub
github.com › rrousselGit › flutter_hooks
GitHub - rrousselGit/flutter_hooks: React hooks for Flutter. Hooks are a new kind of object that manages a Widget life-cycles. They are used to increase code sharing between widgets and as a complete replacement for StatefulWidget.
This category of hooks the manipulation of existing Flutter/Dart objects with hooks. They will take care of creating/updating/disposing an object. ... Subscribes to a Stream and returns its current state as an AsyncSnapshot.
Starred by 3.3K users
Forked by 191 users
Languages Dart 100.0% | Dart 100.0%
Qiita
qiita.com › dart
Flutter HooksのuseXXXの使い方 - Qiita
September 14, 2020 - class UseEffectSample extends HookWidget { @override Widget build(BuildContext context) { final store = useMemoized(() => MyStore()); useEffect(() { // 初期表示時にデータのロードを実行 store.loadData(); // 関数(Function())を返却しておくと、Widgetのライフサイクルに合わせてWidgetのdisposeのタイミングで関数を実行してくれます（不要であればnullでOK） return store.dispose; }, // [keys]は空配列でも問題ない const []); return SomeWidget(); } }
LogRocket
blog.logrocket.com › home › how to use flutter hooks
How to use Flutter Hooks - LogRocket Blog
June 4, 2024 - The function callback in useEffect is called synchronously, meaning it’s called every time the widget renders or rerenders.
Seanconnolly
seanconnolly.dev › async-useeffect
Async functions with React's useEffect hook · Sean Connolly
useEffect(() => { (async () => { try { await doSomething(); } catch (err) { console.error(err); } })(); }, []);
Top answer 1 of 7
188
Create an async function inside your effect that wait the getData(1) result then call setData():
useEffect(() => {
const fetchData = async () => {
const data = await getData(1);
setData(data);
}
fetchData();
}, []);
2 of 7
58
If you're invoking it right-away you might want to use it as an anonymous function:
useEffect(() => {
(async () => {
const data = await getData(1);
setData(data);
})();
}, []);