React 16.7 Hooks : `react.useState` is not a function
up vote
6
down vote
favorite
I am trying functional components with hooks of react 16.7,there is an error:
src/components/Footer/index.js
function Footer() {
const [selectedTab, setSelectedTab] = useState('redTab');
const [hidden, setHidden] = useState(false);
const [fullScreen, setFullScreen] = useState(false);
//...
}
package.json
What should I do?
reactjs react-hooks
edited Nov 13 at 14:23
skyboyer
3,18611128
asked Nov 13 at 14:08
zwl1619
98231739
add a comment |
up vote
6
down vote
favorite
I am trying functional components with hooks of react 16.7,there is an error:
src/components/Footer/index.js
function Footer() {
const [selectedTab, setSelectedTab] = useState('redTab');
const [hidden, setHidden] = useState(false);
const [fullScreen, setFullScreen] = useState(false);
//...
}
package.json
What should I do?
reactjs react-hooks
edited Nov 13 at 14:23
skyboyer
3,18611128
asked Nov 13 at 14:08
zwl1619
98231739
1
Are you sure you have installed it and not just bumped the version inpackage.json? Try to removenode_modulesand install again:rm -rf ./node_modules && npm install. Make sure you upgradereact-domto the same version as well.
– Tholle
Nov 13 at 14:10
1
Possible duplicate of TypeError dispatcher.useState is not a function when using React Hooks
– Yangshun Tay
Nov 15 at 0:09
add a comment |
up vote
6
down vote
favorite
up vote
6
down vote
favorite
I am trying functional components with hooks of react 16.7,there is an error:
src/components/Footer/index.js
function Footer() {
const [selectedTab, setSelectedTab] = useState('redTab');
const [hidden, setHidden] = useState(false);
const [fullScreen, setFullScreen] = useState(false);
//...
}
package.json
What should I do?
reactjs react-hooks
edited Nov 13 at 14:23
skyboyer
3,18611128
asked Nov 13 at 14:08
zwl1619
98231739
I am trying functional components with hooks of react 16.7,there is an error:
src/components/Footer/index.js
function Footer() {
const [selectedTab, setSelectedTab] = useState('redTab');
const [hidden, setHidden] = useState(false);
const [fullScreen, setFullScreen] = useState(false);
//...
}
package.json
What should I do?
reactjs react-hooks
reactjs react-hooks
edited Nov 13 at 14:23
skyboyer
3,18611128
asked Nov 13 at 14:08
zwl1619
98231739
edited Nov 13 at 14:23
skyboyer
3,18611128
asked Nov 13 at 14:08
zwl1619
98231739
edited Nov 13 at 14:23
skyboyer
3,18611128
edited Nov 13 at 14:23
skyboyer
3,18611128
edited Nov 13 at 14:23
skyboyer
3,18611128
3,18611128
asked Nov 13 at 14:08
zwl1619
98231739
asked Nov 13 at 14:08
zwl1619
98231739
asked Nov 13 at 14:08
zwl1619
98231739
98231739
1
Are you sure you have installed it and not just bumped the version inpackage.json? Try to removenode_modulesand install again:rm -rf ./node_modules && npm install. Make sure you upgradereact-domto the same version as well.
– Tholle
Nov 13 at 14:10
1
Possible duplicate of TypeError dispatcher.useState is not a function when using React Hooks
– Yangshun Tay
Nov 15 at 0:09
add a comment |
1
Are you sure you have installed it and not just bumped the version inpackage.json? Try to removenode_modulesand install again:rm -rf ./node_modules && npm install. Make sure you upgradereact-domto the same version as well.
– Tholle
Nov 13 at 14:10
1
Possible duplicate of TypeError dispatcher.useState is not a function when using React Hooks
– Yangshun Tay
Nov 15 at 0:09
1
1
Are you sure you have installed it and not just bumped the version in
package.json? Try to remove node_modules and install again: rm -rf ./node_modules && npm install. Make sure you upgrade react-dom to the same version as well.– Tholle
Nov 13 at 14:10
Are you sure you have installed it and not just bumped the version in
package.json? Try to remove node_modules and install again: rm -rf ./node_modules && npm install. Make sure you upgrade react-dom to the same version as well.– Tholle
Nov 13 at 14:10
1
1
Possible duplicate of TypeError dispatcher.useState is not a function when using React Hooks
– Yangshun Tay
Nov 15 at 0:09
Possible duplicate of TypeError dispatcher.useState is not a function when using React Hooks
– Yangshun Tay
Nov 15 at 0:09
add a comment |
3 Answers
3
active
oldest
votes
up vote
8
down vote
accepted
Make sure that you upgrade react-dom to 16.7.0-alpha.0 as well.
package.json
{
"dependencies": {
"react": "16.7.0-alpha.0",
"react-dom" "16.7.0-alpha.0",
...
},
...
}
It might also be that you only bumped the version in package.json without installing the new version. You can remove node_modules and install again.
npm ci
Example
const { useState } = React;
function Footer() {
const [selectedTab, setSelectedTab] = useState('redTab');
const [hidden, setHidden] = useState(false);
const [fullScreen, setFullScreen] = useState(false);
return (
<div>
<button onClick={() => setSelectedTab('blueTab')}>{selectedTab}</button>
<button onClick={() => setHidden(isHidden => !isHidden)}>
{hidden ? 'hidden' : 'visible'}
</button>
<button onClick={() => setFullScreen(isFullScreen => !isFullScreen)}>
{fullScreen ? 'fullscreen' : 'windowed'}
</button>
</div>
);
}
ReactDOM.render(
<Footer />,
document.getElementById('root')
);<script src="https://unpkg.com/react@16.7.0-alpha.0/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@16.7.0-alpha.0/umd/react-dom.development.js"></script>
<div id="root"></div>answered Nov 13 at 14:30
Tholle
33.5k53558
add a comment |
up vote
2
down vote
React and react-dom versions are different in your package.json
So to fix the issue you need to upgrade react-dom to the same version as react
Run below command. This will install react-dom version 16.7.0-alpha.0
npm i -s react-dom@16.7.0-alpha.0
After installing react-dom re bundle the project.
answered Nov 13 at 14:27
Hemadri Dasari
7,02111039
add a comment |
up vote
0
down vote
I have installed both react and react-dom alpha, as you can see in this package.json.
Using, in the same project, the following code, would work just fine:
import React, { useRef, useState } from 'react';
function Counter() {
const [count, setCount] = useState(0);
const [icount, setICount] = useState(0);
const {current: increment} = useRef(1 + Math.floor(Math.random() * 5));
return (
<div>
Count {count}<br />
Increment {increment}<br />
<button onClick={() => {
setCount(count + 1);
setICount(icount + increment);
}} clicks={count}>
Current {icount}
</button>
</div>
);
}
export default Counter;
That export can be tested/used via a basic app like:
import React from 'react';
import ReactDOM from 'react-dom';
import Counter from './Counter';
ReactDOM.render(<Counter />, document.body);
I hope this example clarifies/solves your issues.
Best Regards
answered Nov 13 at 14:13
Andrea Giammarchi
1,343711
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
8
down vote
accepted
Make sure that you upgrade react-dom to 16.7.0-alpha.0 as well.
package.json
{
"dependencies": {
"react": "16.7.0-alpha.0",
"react-dom" "16.7.0-alpha.0",
...
},
...
}
It might also be that you only bumped the version in package.json without installing the new version. You can remove node_modules and install again.
npm ci
Example
const { useState } = React;
function Footer() {
const [selectedTab, setSelectedTab] = useState('redTab');
const [hidden, setHidden] = useState(false);
const [fullScreen, setFullScreen] = useState(false);
return (
<div>
<button onClick={() => setSelectedTab('blueTab')}>{selectedTab}</button>
<button onClick={() => setHidden(isHidden => !isHidden)}>
{hidden ? 'hidden' : 'visible'}
</button>
<button onClick={() => setFullScreen(isFullScreen => !isFullScreen)}>
{fullScreen ? 'fullscreen' : 'windowed'}
</button>
</div>
);
}
ReactDOM.render(
<Footer />,
document.getElementById('root')
);<script src="https://unpkg.com/react@16.7.0-alpha.0/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@16.7.0-alpha.0/umd/react-dom.development.js"></script>
<div id="root"></div>answered Nov 13 at 14:30
Tholle
33.5k53558
add a comment |
up vote
8
down vote
accepted
Make sure that you upgrade react-dom to 16.7.0-alpha.0 as well.
package.json
{
"dependencies": {
"react": "16.7.0-alpha.0",
"react-dom" "16.7.0-alpha.0",
...
},
...
}
It might also be that you only bumped the version in package.json without installing the new version. You can remove node_modules and install again.
npm ci
Example
const { useState } = React;
function Footer() {
const [selectedTab, setSelectedTab] = useState('redTab');
const [hidden, setHidden] = useState(false);
const [fullScreen, setFullScreen] = useState(false);
return (
<div>
<button onClick={() => setSelectedTab('blueTab')}>{selectedTab}</button>
<button onClick={() => setHidden(isHidden => !isHidden)}>
{hidden ? 'hidden' : 'visible'}
</button>
<button onClick={() => setFullScreen(isFullScreen => !isFullScreen)}>
{fullScreen ? 'fullscreen' : 'windowed'}
</button>
</div>
);
}
ReactDOM.render(
<Footer />,
document.getElementById('root')
);<script src="https://unpkg.com/react@16.7.0-alpha.0/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@16.7.0-alpha.0/umd/react-dom.development.js"></script>
<div id="root"></div>answered Nov 13 at 14:30
Tholle
33.5k53558
add a comment |
up vote
8
down vote
accepted
up vote
8
down vote
accepted
Make sure that you upgrade react-dom to 16.7.0-alpha.0 as well.
package.json
{
"dependencies": {
"react": "16.7.0-alpha.0",
"react-dom" "16.7.0-alpha.0",
...
},
...
}
It might also be that you only bumped the version in package.json without installing the new version. You can remove node_modules and install again.
npm ci
Example
const { useState } = React;
function Footer() {
const [selectedTab, setSelectedTab] = useState('redTab');
const [hidden, setHidden] = useState(false);
const [fullScreen, setFullScreen] = useState(false);
return (
<div>
<button onClick={() => setSelectedTab('blueTab')}>{selectedTab}</button>
<button onClick={() => setHidden(isHidden => !isHidden)}>
{hidden ? 'hidden' : 'visible'}
</button>
<button onClick={() => setFullScreen(isFullScreen => !isFullScreen)}>
{fullScreen ? 'fullscreen' : 'windowed'}
</button>
</div>
);
}
ReactDOM.render(
<Footer />,
document.getElementById('root')
);<script src="https://unpkg.com/react@16.7.0-alpha.0/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@16.7.0-alpha.0/umd/react-dom.development.js"></script>
<div id="root"></div>answered Nov 13 at 14:30
Tholle
33.5k53558
Make sure that you upgrade react-dom to 16.7.0-alpha.0 as well.
package.json
{
"dependencies": {
"react": "16.7.0-alpha.0",
"react-dom" "16.7.0-alpha.0",
...
},
...
}
It might also be that you only bumped the version in package.json without installing the new version. You can remove node_modules and install again.
npm ci
Example
const { useState } = React;
function Footer() {
const [selectedTab, setSelectedTab] = useState('redTab');
const [hidden, setHidden] = useState(false);
const [fullScreen, setFullScreen] = useState(false);
return (
<div>
<button onClick={() => setSelectedTab('blueTab')}>{selectedTab}</button>
<button onClick={() => setHidden(isHidden => !isHidden)}>
{hidden ? 'hidden' : 'visible'}
</button>
<button onClick={() => setFullScreen(isFullScreen => !isFullScreen)}>
{fullScreen ? 'fullscreen' : 'windowed'}
</button>
</div>
);
}
ReactDOM.render(
<Footer />,
document.getElementById('root')
);<script src="https://unpkg.com/react@16.7.0-alpha.0/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@16.7.0-alpha.0/umd/react-dom.development.js"></script>
<div id="root"></div>const { useState } = React;
function Footer() {
const [selectedTab, setSelectedTab] = useState('redTab');
const [hidden, setHidden] = useState(false);
const [fullScreen, setFullScreen] = useState(false);
return (
<div>
<button onClick={() => setSelectedTab('blueTab')}>{selectedTab}</button>
<button onClick={() => setHidden(isHidden => !isHidden)}>
{hidden ? 'hidden' : 'visible'}
</button>
<button onClick={() => setFullScreen(isFullScreen => !isFullScreen)}>
{fullScreen ? 'fullscreen' : 'windowed'}
</button>
</div>
);
}
ReactDOM.render(
<Footer />,
document.getElementById('root')
);<script src="https://unpkg.com/react@16.7.0-alpha.0/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@16.7.0-alpha.0/umd/react-dom.development.js"></script>
<div id="root"></div>const { useState } = React;
function Footer() {
const [selectedTab, setSelectedTab] = useState('redTab');
const [hidden, setHidden] = useState(false);
const [fullScreen, setFullScreen] = useState(false);
return (
<div>
<button onClick={() => setSelectedTab('blueTab')}>{selectedTab}</button>
<button onClick={() => setHidden(isHidden => !isHidden)}>
{hidden ? 'hidden' : 'visible'}
</button>
<button onClick={() => setFullScreen(isFullScreen => !isFullScreen)}>
{fullScreen ? 'fullscreen' : 'windowed'}
</button>
</div>
);
}
ReactDOM.render(
<Footer />,
document.getElementById('root')
);<script src="https://unpkg.com/react@16.7.0-alpha.0/umd/react.development.js"></script>
<script src="https://unpkg.com/react-dom@16.7.0-alpha.0/umd/react-dom.development.js"></script>
<div id="root"></div>answered Nov 13 at 14:30
Tholle
33.5k53558
edited Nov 20 at 0:01
answered Nov 13 at 14:30
Tholle
33.5k53558
answered Nov 13 at 14:30
Tholle
33.5k53558
answered Nov 13 at 14:30
Tholle
33.5k53558
33.5k53558
add a comment |
add a comment |
up vote
2
down vote
React and react-dom versions are different in your package.json
So to fix the issue you need to upgrade react-dom to the same version as react
Run below command. This will install react-dom version 16.7.0-alpha.0
npm i -s react-dom@16.7.0-alpha.0
After installing react-dom re bundle the project.
answered Nov 13 at 14:27
Hemadri Dasari
7,02111039
add a comment |
up vote
2
down vote
React and react-dom versions are different in your package.json
So to fix the issue you need to upgrade react-dom to the same version as react
Run below command. This will install react-dom version 16.7.0-alpha.0
npm i -s react-dom@16.7.0-alpha.0
After installing react-dom re bundle the project.
answered Nov 13 at 14:27
Hemadri Dasari
7,02111039
add a comment |
up vote
2
down vote
up vote
2
down vote
React and react-dom versions are different in your package.json
So to fix the issue you need to upgrade react-dom to the same version as react
Run below command. This will install react-dom version 16.7.0-alpha.0
npm i -s react-dom@16.7.0-alpha.0
After installing react-dom re bundle the project.
answered Nov 13 at 14:27
Hemadri Dasari
7,02111039
React and react-dom versions are different in your package.json
So to fix the issue you need to upgrade react-dom to the same version as react
Run below command. This will install react-dom version 16.7.0-alpha.0
npm i -s react-dom@16.7.0-alpha.0
After installing react-dom re bundle the project.
answered Nov 13 at 14:27
Hemadri Dasari
7,02111039
edited Nov 13 at 14:34
answered Nov 13 at 14:27
Hemadri Dasari
7,02111039
answered Nov 13 at 14:27
Hemadri Dasari
7,02111039
answered Nov 13 at 14:27
Hemadri Dasari
7,02111039
7,02111039
add a comment |
add a comment |
up vote
0
down vote
I have installed both react and react-dom alpha, as you can see in this package.json.
Using, in the same project, the following code, would work just fine:
import React, { useRef, useState } from 'react';
function Counter() {
const [count, setCount] = useState(0);
const [icount, setICount] = useState(0);
const {current: increment} = useRef(1 + Math.floor(Math.random() * 5));
return (
<div>
Count {count}<br />
Increment {increment}<br />
<button onClick={() => {
setCount(count + 1);
setICount(icount + increment);
}} clicks={count}>
Current {icount}
</button>
</div>
);
}
export default Counter;
That export can be tested/used via a basic app like:
import React from 'react';
import ReactDOM from 'react-dom';
import Counter from './Counter';
ReactDOM.render(<Counter />, document.body);
I hope this example clarifies/solves your issues.
Best Regards
answered Nov 13 at 14:13
Andrea Giammarchi
1,343711
add a comment |
up vote
0
down vote
I have installed both react and react-dom alpha, as you can see in this package.json.
Using, in the same project, the following code, would work just fine:
import React, { useRef, useState } from 'react';
function Counter() {
const [count, setCount] = useState(0);
const [icount, setICount] = useState(0);
const {current: increment} = useRef(1 + Math.floor(Math.random() * 5));
return (
<div>
Count {count}<br />
Increment {increment}<br />
<button onClick={() => {
setCount(count + 1);
setICount(icount + increment);
}} clicks={count}>
Current {icount}
</button>
</div>
);
}
export default Counter;
That export can be tested/used via a basic app like:
import React from 'react';
import ReactDOM from 'react-dom';
import Counter from './Counter';
ReactDOM.render(<Counter />, document.body);
I hope this example clarifies/solves your issues.
Best Regards
answered Nov 13 at 14:13
Andrea Giammarchi
1,343711
add a comment |
up vote
0
down vote
up vote
0
down vote
I have installed both react and react-dom alpha, as you can see in this package.json.
Using, in the same project, the following code, would work just fine:
import React, { useRef, useState } from 'react';
function Counter() {
const [count, setCount] = useState(0);
const [icount, setICount] = useState(0);
const {current: increment} = useRef(1 + Math.floor(Math.random() * 5));
return (
<div>
Count {count}<br />
Increment {increment}<br />
<button onClick={() => {
setCount(count + 1);
setICount(icount + increment);
}} clicks={count}>
Current {icount}
</button>
</div>
);
}
export default Counter;
That export can be tested/used via a basic app like:
import React from 'react';
import ReactDOM from 'react-dom';
import Counter from './Counter';
ReactDOM.render(<Counter />, document.body);
I hope this example clarifies/solves your issues.
Best Regards
answered Nov 13 at 14:13
Andrea Giammarchi
1,343711
I have installed both react and react-dom alpha, as you can see in this package.json.
Using, in the same project, the following code, would work just fine:
import React, { useRef, useState } from 'react';
function Counter() {
const [count, setCount] = useState(0);
const [icount, setICount] = useState(0);
const {current: increment} = useRef(1 + Math.floor(Math.random() * 5));
return (
<div>
Count {count}<br />
Increment {increment}<br />
<button onClick={() => {
setCount(count + 1);
setICount(icount + increment);
}} clicks={count}>
Current {icount}
</button>
</div>
);
}
export default Counter;
That export can be tested/used via a basic app like:
import React from 'react';
import ReactDOM from 'react-dom';
import Counter from './Counter';
ReactDOM.render(<Counter />, document.body);
I hope this example clarifies/solves your issues.
Best Regards
answered Nov 13 at 14:13
Andrea Giammarchi
1,343711
answered Nov 13 at 14:13
Andrea Giammarchi
1,343711
answered Nov 13 at 14:13
Andrea Giammarchi
1,343711
answered Nov 13 at 14:13
Andrea Giammarchi
1,343711
1,343711
add a comment |
add a comment |
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1
Are you sure you have installed it and not just bumped the version in
package.json? Try to removenode_modulesand install again:rm -rf ./node_modules && npm install. Make sure you upgradereact-domto the same version as well.– Tholle
Nov 13 at 14:10
1
Possible duplicate of TypeError dispatcher.useState is not a function when using React Hooks
– Yangshun Tay
Nov 15 at 0:09