[英]React JS with Material UI - When using withStyles this.props is undefined
When I run the code below I expected that styles would be injected inside props, but I always end up getting undefined props.当我运行下面的代码时,我预计 styles 将被注入道具内部,但我总是最终得到未定义的道具。
I am not providing any props to this component.我没有为此组件提供任何道具。
const styles = theme => ({
root: {
'& .MuiTextField-root': {
margin: theme.spacing(1),
width: '25ch',
},
},
});
class Editor extends React.Component {
render() {
const { classes } = this.props;
return (
<div className="editor">
<form className={classes.root} noValidate autoComplete="off">
<TextField id="standard-basic" label="Standard" />
<Button variant="contained" color="primary">
Hello World
</Button>
</form>
</div>
);
}
}
export default withStyles(styles)(Editor);
Hi you can use makeStyles from '@material-ui/core/styles'.您好,您可以使用来自“@material-ui/core/styles”的makeStyles 。 Please check complete example below:
请检查下面的完整示例:
import React from 'react';
import {makeStyles} from '@material-ui/core/styles';
import Grid from '@material-ui/core/Grid';
import FormLabel from '@material-ui/core/FormLabel';
import FormControlLabel from '@material-ui/core/FormControlLabel';
import RadioGroup from '@material-ui/core/RadioGroup';
import Radio from '@material-ui/core/Radio';
import Paper from '@material-ui/core/Paper';
const useStyles = makeStyles((theme) => ({
root: {
flexGrow: 1,
},
paper: {
height: 140,
width: 100,
},
control: {
padding: theme.spacing(2),
},
}));
export default function SpacingGrid() {
const [spacing, setSpacing] = React.useState(2);
const classes = useStyles();
const handleChange = (event) => {
setSpacing(Number(event.target.value));
};
return (
<Grid container className={classes.root} spacing={2}>
<Grid item xs={12}>
<Grid container justify="center" spacing={spacing}>
{[0, 1, 2].map((value) => (
<Grid key={value} item>
<Paper className={classes.paper}/>
</Grid>
))}
</Grid>
</Grid>
<Grid item xs={12}>
<Paper className={classes.control}>
<Grid container>
<Grid item>
<FormLabel>spacing</FormLabel>
<RadioGroup
name="spacing"
aria-label="spacing"
value={spacing.toString()}
onChange={handleChange}
row
>
{[0, 1, 2].map((value) => (
<FormControlLabel
key={value}
value={value.toString()}
control={<Radio/>}
label={value.toString()}
/>
))}
</RadioGroup>
</Grid>
</Grid>
</Paper>
</Grid>
</Grid>
);
}
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