Question

我正在使用带有反应的材料 ui 我想知道 如何在用户悬停时更改卡片组件的背景颜色？

这是我在 codeasandbox 中的实时代码 link。

下面我也放了我的代码。

MyCard.js 在这里，我想更改悬停时的背景颜色，以便填充区域更改颜色

import React from "react";
import { makeStyles } from "@material-ui/core/styles";
import Card from "@material-ui/core/Card";
import CardActionArea from "@material-ui/core/CardActionArea";
import CardMedia from "@material-ui/core/CardMedia";

const useStyles = makeStyles((theme) => ({
  root: {
    // maxWidth: 345,
    margin: theme.spacing(0.5),
    padding: theme.spacing(0.8),
    borderRadius: theme.spacing(0),
    "& :hover": {
      backgroundColor: "green"
    }
  },
  media: {
    height: 140
  }
}));

export default function MyCard() {
  const classes = useStyles();

  return (
    <Card className={classes.root} elevation={3}>
      <CardActionArea>
        <CardMedia
          className={classes.media}
          image="https://images.pexels.com/photos/2787341/pexels-photo-2787341.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940"
          title="Face"
        />
      </CardActionArea>
    </Card>
  );
}

Answer 1

您应该尝试在悬停属性中省略该空格，并编写“&:hover”而不是“&(space):hover”。它在您的沙箱代码中运行良好。

Answer 2

在 Y.S. 的帮助下我发现这只是一个错字，在 & 附近有多余的空间这是工作代码

import React from "react";
import { makeStyles } from "@material-ui/core/styles";
import Card from "@material-ui/core/Card";
import CardActionArea from "@material-ui/core/CardActionArea";
import CardMedia from "@material-ui/core/CardMedia";
import { Paper } from "@material-ui/core";

const useStyles = makeStyles((theme) => ({
  root: {
    // maxWidth: 345,
    margin: theme.spacing(0.5),
    padding: theme.spacing(0.8),
    borderRadius: theme.spacing(0),
    "&:hover": {
      backgroundColor: "green"
    }
  },
  media: {
    height: 140
  }
}));

export default function MyCard() {
  const classes = useStyles();

  return (
    <Card className={classes.root} elevation={3}>
      <CardActionArea>
        <CardMedia
          className={classes.media}
          image="https://images.pexels.com/photos/2787341/pexels-photo-2787341.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940"
          title="Face"
        />
      </CardActionArea>
    </Card>
  );
}

如何在悬停时更改材质 ui 卡的背景颜色？

2 个答案: