选择字段可以在这里找到:在 Material-UI 演示中 http://www.material-ui.com/#/components/select-field
它的方法似乎是从菜单/弹出窗口类继承的,但我无法弄清楚如何在 onFocus 事件触发时触发“打开”。这将解决我与键盘相关的可用性问题!
看例子https://material-ui.com/components/selects/#control-open-select https://material-ui.com/components/selects/#controlled-open-select
import React from 'react';
import { makeStyles } from '@material-ui/core/styles';
import InputLabel from '@material-ui/core/InputLabel';
import MenuItem from '@material-ui/core/MenuItem';
import FormControl from '@material-ui/core/FormControl';
import Select from '@material-ui/core/Select';
import Button from '@material-ui/core/Button';
const useStyles = makeStyles((theme) => ({
button: {
display: 'block',
marginTop: theme.spacing(2),
},
formControl: {
margin: theme.spacing(1),
minWidth: 120,
},
}));
export default function ControlledOpenSelect() {
const classes = useStyles();
const [age, setAge] = React.useState('');
const [open, setOpen] = React.useState(false);
const handleChange = (event) => {
setAge(event.target.value);
};
const handleClose = () => {
setOpen(false);
};
const handleOpen = () => {
setOpen(true);
};
return (
<div>
<Button className={classes.button} onClick={handleOpen}>
Open the select
</Button>
<FormControl className={classes.formControl}>
<InputLabel id="demo-controlled-open-select-label">Age</InputLabel>
<Select
labelId="demo-controlled-open-select-label"
id="demo-controlled-open-select"
open={open}
onClose={handleClose}
onOpen={handleOpen}
value={age}
onChange={handleChange}
>
<MenuItem value="">
<em>None</em>
</MenuItem>
<MenuItem value={10}>Ten</MenuItem>
<MenuItem value={20}>Twenty</MenuItem>
<MenuItem value={30}>Thirty</MenuItem>
</Select>
</FormControl>
</div>
);
}
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