reactjs - 如何更改 Material UI 选择边框和标签

Question

我正在尝试更改 select 的边框来自 Material-UI 的组件。
到目前为止，我已经尝试过:

const styles = theme => ({
  root: {
    display: "flex",
    flexWrap: "wrap",
    backgroundColor: "lightgrey"
  },
  formControl: {
    margin: theme.spacing.unit,
    minWidth: 120
  },
  selectEmpty: {
    marginTop: theme.spacing.unit * 2
  },
  cssLabel: {
    color: "pink",
    "&$cssFocused": {
      color: "pink"
    }
  },
  cssFocused: {
    color: "pink"
  },
  underline: {
    "&:after": {
      borderBottom: "1px solid pink",
      borderTop: "1px solid pink"
    }
  }
});

我可以定制 TextField等等，但经过许多小时后，我仍然无法自定义选择。我也试图通过 Input ，但随后您必须自定义 Input ，甚至更糟。

有人可以帮我处理这个沙箱吗？

https://codesandbox.io/s/material-demo-ecj1k

我真的很感激。

Answer 1

下面是覆盖默认、悬停和聚焦状态的边框 ( MuiOutlinedInput-notchedOutline )、标签 ( MuiInputLabel-root ) 和选定项目文本 ( MuiOutlinedInput-input ) 颜色的示例。

import React from "react";
import ReactDOM from "react-dom";

import TextField from "@material-ui/core/TextField";
import MenuItem from "@material-ui/core/MenuItem";
import { makeStyles } from "@material-ui/core/styles";

const useStyles = makeStyles({
  root: {
    width: 200,
    "& .MuiOutlinedInput-input": {
      color: "green"
    },
    "& .MuiInputLabel-root": {
      color: "green"
    },
    "& .MuiOutlinedInput-root .MuiOutlinedInput-notchedOutline": {
      borderColor: "green"
    },
    "&:hover .MuiOutlinedInput-input": {
      color: "red"
    },
    "&:hover .MuiInputLabel-root": {
      color: "red"
    },
    "&:hover .MuiOutlinedInput-root .MuiOutlinedInput-notchedOutline": {
      borderColor: "red"
    },
    "& .MuiOutlinedInput-root.Mui-focused .MuiOutlinedInput-input": {
      color: "purple"
    },
    "& .MuiInputLabel-root.Mui-focused": {
      color: "purple"
    },
    "& .MuiOutlinedInput-root.Mui-focused .MuiOutlinedInput-notchedOutline": {
      borderColor: "purple"
    }
  }
});

function App() {
  const [age, setAge] = React.useState("");
  const classes = useStyles();
  return (
    <div className="App">
      <TextField
        className={classes.root}
        value={age}
        onChange={e => setAge(e.target.value)}
        variant="outlined"
        label="My Label"
        select
      >
        <MenuItem value="">
          <em>None</em>
        </MenuItem>
        <MenuItem value={10}>Ten</MenuItem>
        <MenuItem value={20}>Twenty</MenuItem>
        <MenuItem value={30}>Thirty</MenuItem>
      </TextField>
    </div>
  );
}

const rootElement = document.getElementById("root");
ReactDOM.render(<App />, rootElement);

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