Mixing
How can I add React hooks into React `class` component?
up vote
1
down vote
favorite
I have for e.g. this react Class:
class MyDiv extends React.component
constructor(){
this.state={sampleState:'hello world'}
}
render(){
return <div>{this.state.sampleState}
}
}
The question is if I can add React hooks to this. I understand that React-Hooks is alternative to React Class style. But if I wish to slowly migrate into React hooks, can I add useful hooks into Classes?
javascript reactjs react-hooks
asked 4 hours ago
Aminadav Glickshtein
7,74733078
add a comment |
up vote
1
down vote
favorite
I have for e.g. this react Class:
class MyDiv extends React.component
constructor(){
this.state={sampleState:'hello world'}
}
render(){
return <div>{this.state.sampleState}
}
}
The question is if I can add React hooks to this. I understand that React-Hooks is alternative to React Class style. But if I wish to slowly migrate into React hooks, can I add useful hooks into Classes?
javascript reactjs react-hooks
asked 4 hours ago
Aminadav Glickshtein
7,74733078
add a comment |
up vote
1
down vote
favorite
up vote
1
down vote
favorite
I have for e.g. this react Class:
class MyDiv extends React.component
constructor(){
this.state={sampleState:'hello world'}
}
render(){
return <div>{this.state.sampleState}
}
}
The question is if I can add React hooks to this. I understand that React-Hooks is alternative to React Class style. But if I wish to slowly migrate into React hooks, can I add useful hooks into Classes?
javascript reactjs react-hooks
asked 4 hours ago
Aminadav Glickshtein
7,74733078
I have for e.g. this react Class:
class MyDiv extends React.component
constructor(){
this.state={sampleState:'hello world'}
}
render(){
return <div>{this.state.sampleState}
}
}
The question is if I can add React hooks to this. I understand that React-Hooks is alternative to React Class style. But if I wish to slowly migrate into React hooks, can I add useful hooks into Classes?
javascript reactjs react-hooks
javascript reactjs react-hooks
asked 4 hours ago
Aminadav Glickshtein
7,74733078
asked 4 hours ago
Aminadav Glickshtein
7,74733078
asked 4 hours ago
Aminadav Glickshtein
7,74733078
asked 4 hours ago
Aminadav Glickshtein
7,74733078
asked 4 hours ago
Aminadav Glickshtein
7,74733078
7,74733078
add a comment |
add a comment |
4 Answers
4
active
oldest
votes
up vote
2
down vote
Class components don't support hooks -
According to the Hooks-FAQ:
You can’t use Hooks inside of a class component, but you can definitely mix classes and function components with Hooks in a single tree. Whether a component is a class or a function that uses Hooks is an implementation detail of that component. In the longer term, we expect Hooks to be the primary way people write React components.
answered 4 hours ago
Gilad Bar
323110
add a comment |
up vote
1
down vote
Hooks are not meant to be used for classes but rather functions. If you wish to use hooks, you can start by writing new code as functional components with hooks
According to React FAQs
You can’t use Hooks inside of a class component, but you can
definitely mix classes and function components with Hooks in a single
tree. Whether a component is a class or a function that uses Hooks is
an implementation detail of that component. In the longer term, we
expect Hooks to be the primary way people write React components.
const MyDiv = () => {
const [sampleState, setState] = useState('hello world');
render(){
return <div>{sampleState}</div>
}
}
answered 4 hours ago
Shubham Khatri
73.9k1382122
it should besetSampleStateno?
– Aseem Upadhyay
4 hours ago
Its a simple array destructuring and can be named anything. setState, setSampleState, setABC
– Shubham Khatri
4 hours ago
alright gotcha.
– Aseem Upadhyay
4 hours ago
add a comment |
up vote
1
down vote
As other answers already explain, hooks API was designed to provide function components with functionality that currently is available only in class components. Hooks aren't supposed to used in class components.
Class components can be written to make easier a migration to function components.
With a single state:
class MyDiv extends Component {
state = {sampleState: 'hello world'};
render(){
const { state } = this;
const setState = state => this.setState(state);
return <div onClick={() => setState({sampleState: 1})}>{state.sampleState}</div>;
}
}
is converted to
const MyDiv = () => {
const [state, setState] = useState({sampleState: 'hello world'});
return <div onClick={() => setState({sampleState: 1})}>{state.sampleState}</div>;
}
Notice that useState state setter doesn't merge state properties automatically, this should be covered with setState(prevState => ({ ...prevState, foo: 1 }));
With multiple states:
class MyDiv extends Component {
state = {sampleState: 'hello world'};
render(){
const { sampleState } = this.state;
const setSampleState = sampleState => this.setState({ sampleState });
return <div onClick={() => setSampleState(1)}>{sampleState}</div>;
}
}
is converted to
const MyDiv = () => {
const [sampleState, setSampleState] = useState('hello world');
return <div onClick={() => setSampleState(1)}>{sampleState}</div>;
}
answered 3 hours ago
estus
63k2193200
add a comment |
up vote
0
down vote
It won't be possible with your existing class components. You'll have to convert your class component into a functional component and then do something on the lines of -
function MyDiv() {
const [sampleState, setSampleState] = useState('hello world');
return (
<div>{sampleState}</div>
)
}
answered 4 hours ago
Aseem Upadhyay
1,021520
add a comment |
4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
Class components don't support hooks -
According to the Hooks-FAQ:
You can’t use Hooks inside of a class component, but you can definitely mix classes and function components with Hooks in a single tree. Whether a component is a class or a function that uses Hooks is an implementation detail of that component. In the longer term, we expect Hooks to be the primary way people write React components.
answered 4 hours ago
Gilad Bar
323110
add a comment |
up vote
2
down vote
Class components don't support hooks -
According to the Hooks-FAQ:
You can’t use Hooks inside of a class component, but you can definitely mix classes and function components with Hooks in a single tree. Whether a component is a class or a function that uses Hooks is an implementation detail of that component. In the longer term, we expect Hooks to be the primary way people write React components.
answered 4 hours ago
Gilad Bar
323110
add a comment |
up vote
2
down vote
up vote
2
down vote
Class components don't support hooks -
According to the Hooks-FAQ:
You can’t use Hooks inside of a class component, but you can definitely mix classes and function components with Hooks in a single tree. Whether a component is a class or a function that uses Hooks is an implementation detail of that component. In the longer term, we expect Hooks to be the primary way people write React components.
answered 4 hours ago
Gilad Bar
323110
Class components don't support hooks -
According to the Hooks-FAQ:
You can’t use Hooks inside of a class component, but you can definitely mix classes and function components with Hooks in a single tree. Whether a component is a class or a function that uses Hooks is an implementation detail of that component. In the longer term, we expect Hooks to be the primary way people write React components.
answered 4 hours ago
Gilad Bar
323110
answered 4 hours ago
Gilad Bar
323110
answered 4 hours ago
Gilad Bar
323110
answered 4 hours ago
Gilad Bar
323110
323110
add a comment |
add a comment |
up vote
1
down vote
Hooks are not meant to be used for classes but rather functions. If you wish to use hooks, you can start by writing new code as functional components with hooks
According to React FAQs
You can’t use Hooks inside of a class component, but you can
definitely mix classes and function components with Hooks in a single
tree. Whether a component is a class or a function that uses Hooks is
an implementation detail of that component. In the longer term, we
expect Hooks to be the primary way people write React components.
const MyDiv = () => {
const [sampleState, setState] = useState('hello world');
render(){
return <div>{sampleState}</div>
}
}
answered 4 hours ago
Shubham Khatri
73.9k1382122
it should besetSampleStateno?
– Aseem Upadhyay
4 hours ago
Its a simple array destructuring and can be named anything. setState, setSampleState, setABC
– Shubham Khatri
4 hours ago
alright gotcha.
– Aseem Upadhyay
4 hours ago
add a comment |
up vote
1
down vote
Hooks are not meant to be used for classes but rather functions. If you wish to use hooks, you can start by writing new code as functional components with hooks
According to React FAQs
You can’t use Hooks inside of a class component, but you can
definitely mix classes and function components with Hooks in a single
tree. Whether a component is a class or a function that uses Hooks is
an implementation detail of that component. In the longer term, we
expect Hooks to be the primary way people write React components.
const MyDiv = () => {
const [sampleState, setState] = useState('hello world');
render(){
return <div>{sampleState}</div>
}
}
answered 4 hours ago
Shubham Khatri
73.9k1382122
it should besetSampleStateno?
– Aseem Upadhyay
4 hours ago
Its a simple array destructuring and can be named anything. setState, setSampleState, setABC
– Shubham Khatri
4 hours ago
alright gotcha.
– Aseem Upadhyay
4 hours ago
add a comment |
up vote
1
down vote
up vote
1
down vote
Hooks are not meant to be used for classes but rather functions. If you wish to use hooks, you can start by writing new code as functional components with hooks
According to React FAQs
You can’t use Hooks inside of a class component, but you can
definitely mix classes and function components with Hooks in a single
tree. Whether a component is a class or a function that uses Hooks is
an implementation detail of that component. In the longer term, we
expect Hooks to be the primary way people write React components.
const MyDiv = () => {
const [sampleState, setState] = useState('hello world');
render(){
return <div>{sampleState}</div>
}
}
answered 4 hours ago
Shubham Khatri
73.9k1382122
Hooks are not meant to be used for classes but rather functions. If you wish to use hooks, you can start by writing new code as functional components with hooks
According to React FAQs
You can’t use Hooks inside of a class component, but you can
definitely mix classes and function components with Hooks in a single
tree. Whether a component is a class or a function that uses Hooks is
an implementation detail of that component. In the longer term, we
expect Hooks to be the primary way people write React components.
const MyDiv = () => {
const [sampleState, setState] = useState('hello world');
render(){
return <div>{sampleState}</div>
}
}
answered 4 hours ago
Shubham Khatri
73.9k1382122
edited 4 hours ago
answered 4 hours ago
Shubham Khatri
73.9k1382122
answered 4 hours ago
Shubham Khatri
73.9k1382122
answered 4 hours ago
Shubham Khatri
73.9k1382122
73.9k1382122
it should besetSampleStateno?
– Aseem Upadhyay
4 hours ago
Its a simple array destructuring and can be named anything. setState, setSampleState, setABC
– Shubham Khatri
4 hours ago
alright gotcha.
– Aseem Upadhyay
4 hours ago
add a comment |
it should besetSampleStateno?
– Aseem Upadhyay
4 hours ago
Its a simple array destructuring and can be named anything. setState, setSampleState, setABC
– Shubham Khatri
4 hours ago
alright gotcha.
– Aseem Upadhyay
4 hours ago
it should be
setSampleState no?– Aseem Upadhyay
4 hours ago
it should be
setSampleState no?– Aseem Upadhyay
4 hours ago
Its a simple array destructuring and can be named anything. setState, setSampleState, setABC
– Shubham Khatri
4 hours ago
Its a simple array destructuring and can be named anything. setState, setSampleState, setABC
– Shubham Khatri
4 hours ago
alright gotcha.
– Aseem Upadhyay
4 hours ago
alright gotcha.
– Aseem Upadhyay
4 hours ago
add a comment |
up vote
1
down vote
As other answers already explain, hooks API was designed to provide function components with functionality that currently is available only in class components. Hooks aren't supposed to used in class components.
Class components can be written to make easier a migration to function components.
With a single state:
class MyDiv extends Component {
state = {sampleState: 'hello world'};
render(){
const { state } = this;
const setState = state => this.setState(state);
return <div onClick={() => setState({sampleState: 1})}>{state.sampleState}</div>;
}
}
is converted to
const MyDiv = () => {
const [state, setState] = useState({sampleState: 'hello world'});
return <div onClick={() => setState({sampleState: 1})}>{state.sampleState}</div>;
}
Notice that useState state setter doesn't merge state properties automatically, this should be covered with setState(prevState => ({ ...prevState, foo: 1 }));
With multiple states:
class MyDiv extends Component {
state = {sampleState: 'hello world'};
render(){
const { sampleState } = this.state;
const setSampleState = sampleState => this.setState({ sampleState });
return <div onClick={() => setSampleState(1)}>{sampleState}</div>;
}
}
is converted to
const MyDiv = () => {
const [sampleState, setSampleState] = useState('hello world');
return <div onClick={() => setSampleState(1)}>{sampleState}</div>;
}
answered 3 hours ago
estus
63k2193200
add a comment |
up vote
1
down vote
As other answers already explain, hooks API was designed to provide function components with functionality that currently is available only in class components. Hooks aren't supposed to used in class components.
Class components can be written to make easier a migration to function components.
With a single state:
class MyDiv extends Component {
state = {sampleState: 'hello world'};
render(){
const { state } = this;
const setState = state => this.setState(state);
return <div onClick={() => setState({sampleState: 1})}>{state.sampleState}</div>;
}
}
is converted to
const MyDiv = () => {
const [state, setState] = useState({sampleState: 'hello world'});
return <div onClick={() => setState({sampleState: 1})}>{state.sampleState}</div>;
}
Notice that useState state setter doesn't merge state properties automatically, this should be covered with setState(prevState => ({ ...prevState, foo: 1 }));
With multiple states:
class MyDiv extends Component {
state = {sampleState: 'hello world'};
render(){
const { sampleState } = this.state;
const setSampleState = sampleState => this.setState({ sampleState });
return <div onClick={() => setSampleState(1)}>{sampleState}</div>;
}
}
is converted to
const MyDiv = () => {
const [sampleState, setSampleState] = useState('hello world');
return <div onClick={() => setSampleState(1)}>{sampleState}</div>;
}
answered 3 hours ago
estus
63k2193200
add a comment |
up vote
1
down vote
up vote
1
down vote
As other answers already explain, hooks API was designed to provide function components with functionality that currently is available only in class components. Hooks aren't supposed to used in class components.
Class components can be written to make easier a migration to function components.
With a single state:
class MyDiv extends Component {
state = {sampleState: 'hello world'};
render(){
const { state } = this;
const setState = state => this.setState(state);
return <div onClick={() => setState({sampleState: 1})}>{state.sampleState}</div>;
}
}
is converted to
const MyDiv = () => {
const [state, setState] = useState({sampleState: 'hello world'});
return <div onClick={() => setState({sampleState: 1})}>{state.sampleState}</div>;
}
Notice that useState state setter doesn't merge state properties automatically, this should be covered with setState(prevState => ({ ...prevState, foo: 1 }));
With multiple states:
class MyDiv extends Component {
state = {sampleState: 'hello world'};
render(){
const { sampleState } = this.state;
const setSampleState = sampleState => this.setState({ sampleState });
return <div onClick={() => setSampleState(1)}>{sampleState}</div>;
}
}
is converted to
const MyDiv = () => {
const [sampleState, setSampleState] = useState('hello world');
return <div onClick={() => setSampleState(1)}>{sampleState}</div>;
}
answered 3 hours ago
estus
63k2193200
As other answers already explain, hooks API was designed to provide function components with functionality that currently is available only in class components. Hooks aren't supposed to used in class components.
Class components can be written to make easier a migration to function components.
With a single state:
class MyDiv extends Component {
state = {sampleState: 'hello world'};
render(){
const { state } = this;
const setState = state => this.setState(state);
return <div onClick={() => setState({sampleState: 1})}>{state.sampleState}</div>;
}
}
is converted to
const MyDiv = () => {
const [state, setState] = useState({sampleState: 'hello world'});
return <div onClick={() => setState({sampleState: 1})}>{state.sampleState}</div>;
}
Notice that useState state setter doesn't merge state properties automatically, this should be covered with setState(prevState => ({ ...prevState, foo: 1 }));
With multiple states:
class MyDiv extends Component {
state = {sampleState: 'hello world'};
render(){
const { sampleState } = this.state;
const setSampleState = sampleState => this.setState({ sampleState });
return <div onClick={() => setSampleState(1)}>{sampleState}</div>;
}
}
is converted to
const MyDiv = () => {
const [sampleState, setSampleState] = useState('hello world');
return <div onClick={() => setSampleState(1)}>{sampleState}</div>;
}
answered 3 hours ago
estus
63k2193200
answered 3 hours ago
estus
63k2193200
answered 3 hours ago
estus
63k2193200
answered 3 hours ago
estus
63k2193200
63k2193200
add a comment |
add a comment |
up vote
0
down vote
It won't be possible with your existing class components. You'll have to convert your class component into a functional component and then do something on the lines of -
function MyDiv() {
const [sampleState, setSampleState] = useState('hello world');
return (
<div>{sampleState}</div>
)
}
answered 4 hours ago
Aseem Upadhyay
1,021520
add a comment |
up vote
0
down vote
It won't be possible with your existing class components. You'll have to convert your class component into a functional component and then do something on the lines of -
function MyDiv() {
const [sampleState, setSampleState] = useState('hello world');
return (
<div>{sampleState}</div>
)
}
answered 4 hours ago
Aseem Upadhyay
1,021520
add a comment |
up vote
0
down vote
up vote
0
down vote
It won't be possible with your existing class components. You'll have to convert your class component into a functional component and then do something on the lines of -
function MyDiv() {
const [sampleState, setSampleState] = useState('hello world');
return (
<div>{sampleState}</div>
)
}
answered 4 hours ago
Aseem Upadhyay
1,021520
It won't be possible with your existing class components. You'll have to convert your class component into a functional component and then do something on the lines of -
function MyDiv() {
const [sampleState, setSampleState] = useState('hello world');
return (
<div>{sampleState}</div>
)
}
answered 4 hours ago
Aseem Upadhyay
1,021520
answered 4 hours ago
Aseem Upadhyay
1,021520
answered 4 hours ago
Aseem Upadhyay
1,021520
answered 4 hours ago
Aseem Upadhyay
1,021520
1,021520
add a comment |
add a comment |
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