我的代码：

Question

我怎么了，你能告诉我2怎么办吗？

我正在创建一个需要钩子替换状态的网站。我在我的index.js上。错误在于菜单内div内的onClicks。菜单来自Material-UI

我的代码：

import Button from '@material-ui/core/Button';
import Menu from '@material-ui/core/Menu';
import MenuItem from '@material-ui/core/MenuItem';

export default function SimpleMenu() {
    const [ anchorEl, setAnchorEl ] = React.useState<null | HTMLElement>(null);
    const [ language, setLanguage ] = useState('English');
    const languages = [ 'English', 'Chinese ( Simplified )', 'Chinese ( Traditional )' ];

    const handleClick = (event: React.MouseEvent<HTMLButtonElement>) => {
        setAnchorEl(event.currentTarget);
    };

    const handleClose = (word: string) => {
        setLanguage(word);
    };

    return (
        <div>
            <Button aria-controls="simple-menu" aria-haspopup="true" onClick={handleClick}>
                Open Menu
            </Button>
            <Menu id="simple-menu" anchorEl={anchorEl} keepMounted open={Boolean(anchorEl)} onClose={handleClose}>
                <div onClick={handleClose(languages[0])}>{languages[0]}</div>
                <div onClick={handleClose(languages[1])}>{languages[1]}</div>
                <div onClick={handleClose(languages[2])}>{languages[2]}</div>
            </Menu>
        </div>
    );
}


----------


error:

```Type 'void' is not assignable to type '(event: MouseEvent<HTMLDivElement, MouseEvent>) => void'.```

can u please help me?

( bottom is gibberish )

Answer 1

将onClick={handleClose(languages[0])}更改为这样的箭头功能

onClick={() => handleClose(languages[0])}

或更改handleClose函数

const handleClose = () => (word: string) => {
    setLanguage(word);
};

Answer 2

嘿，希望这能解决您的问题：首先像这样在按钮上编写 onClick ：

    <Button
      aria-controls="simple-menu"
      aria-haspopup="true"
      onClick={() => handleClick(event as MouseEvent)}
    >
      Open Menu
    </Button>

然后像这样写你的句柄点击：

    const handleClick = (event: MouseEvent) => {
    setAnchorEl(event.currentTarget);
};

可能不是最好的解决方案，但我认为它可以解决您的问题:)

类型'void'不能分配给类型'（event：MouseEvent <HTMLDivElement，MouseEvent>）=> void'

我的代码：

2 个答案: