Я пытаюсь использовать код из пользовательского интерфейса материала и получаю эту ошибку:
Invalid hook call. Hooks can only be called inside of the body of a function component.
This could happen for one of the following reasons:
1. You might have mismatching versions of React and the renderer (such as React DOM)
2. You might be breaking the Rules of Hooks
3. You might have more than one copy of React in the same app
Я не уверен, что является причиной проблемы, если я не использую класс (так как я знаю, что реагирующие хуки не могутиспользоваться внутри класса). Мне интересно, это как-то связано с ReactDOM?
Это единственный код, который я использую:
====== index.js =======
import React from 'react';
import ReactDOM from 'react-dom';
import App from './Pages/HomePage.jsx';
ReactDOM.render(<App />, document.getElementById('root'));
======= HomePage.js =======
import React, { useState } from 'react';
import AB from '../Components/AppBar';
export default function HP() {
const [buttonClicked, setButtonClicked] = useState(false);
if (buttonClicked === false )
return (
<Button color="info" onClick={() => setButtonClicked(true)}>Get Started</Button>
)
if (buttonClicked) return (<AB/>)
};
======= AppBar.js =======
import React from 'react';
import AppBar from '@material-ui/core/AppBar';
import Toolbar from '@material-ui/core/Toolbar';
import IconButton from '@material-ui/core/IconButton';
import Typography from '@material-ui/core/Typography';
import InputBase from '@material-ui/core/InputBase';
import { fade, makeStyles } from '@material-ui/core/styles';
import MenuIcon from '@material-ui/icons/Menu';
import SearchIcon from '@material-ui/icons/Search';
const useStyles = makeStyles(theme => ({
root: {
flexGrow: 1,
},
menuButton: {
marginRight: theme.spacing(2),
},
title: {
flexGrow: 1,
display: 'none',
[theme.breakpoints.up('sm')]: {
display: 'block',
},
},
search: {
position: 'relative',
borderRadius: theme.shape.borderRadius,
backgroundColor: fade(theme.palette.common.white, 0.15),
'&:hover': {
backgroundColor: fade(theme.palette.common.white, 0.25),
},
marginLeft: 0,
width: '100%',
[theme.breakpoints.up('sm')]: {
marginLeft: theme.spacing(1),
width: 'auto',
},
},
searchIcon: {
width: theme.spacing(7),
height: '100%',
position: 'absolute',
pointerEvents: 'none',
display: 'flex',
alignItems: 'center',
justifyContent: 'center',
},
inputRoot: {
color: 'inherit',
},
inputInput: {
padding: theme.spacing(1, 1, 1, 7),
transition: theme.transitions.create('width'),
width: '100%',
[theme.breakpoints.up('sm')]: {
width: 120,
'&:focus': {
width: 200,
},
},
},
}));
export default function SearchAppBar() {
const classes = useStyles();
return (
<div className={classes.root}>
<AppBar position="static">
<Toolbar>
<IconButton
edge="start"
className={classes.menuButton}
color="inherit"
aria-label="open drawer"
>
<MenuIcon />
</IconButton>
<Typography className={classes.title} variant="h6" noWrap>
Material-UI
</Typography>
<div className={classes.search}>
<div className={classes.searchIcon}>
<SearchIcon />
</div>
<InputBase
placeholder="Search…"
classes={{
root: classes.inputRoot,
input: classes.inputInput,
}}
inputProps={{ 'aria-label': 'search' }}
/>
</div>
</Toolbar>
</AppBar>
</div>
);
}