如何在MaterialUI/React中全局更改fontWeight

import React from 'react';
import { makeStyles } from '@material-ui/core/styles';
import Button from '@material-ui/core/Button';

const useStyles = makeStyles({
  root: {
    fontWeight: 'bold', // 设置全局的fontWeight
  },
});

function App() {
  const classes = useStyles();

  return (
    <div className={classes.root}>
      <Button variant="contained">Bold Text Button</Button>
      <Button variant="outlined">Bold Text Outline Button</Button>
    </div>
  );
}

export default App;

import React from 'react';
import { createMuiTheme, ThemeProvider } from '@material-ui/core/styles';
import Button from '@material-ui/core/Button';

const theme = createMuiTheme({
  typography: {
    fontWeightBold: 700, // 设置全局的fontWeight
  },
});

function App() {
  return (
    <ThemeProvider theme={theme}>
      <Button variant="contained">Bold Text Button</Button>
      <Button variant="outlined">Bold Text Outline Button</Button>
    </ThemeProvider>
  );
}

export default App;

/* 在全局CSS文件中 */
body {
  font-weight: bold;
}

import React from 'react';
import './global.css'; // 引入全局CSS文件
import Button from '@material-ui/core/Button';

function App() {
  return (
    <div>
      <Button variant="contained">Bold Text Button</Button>
      <Button variant="outlined">Bold Text Outline Button</Button>
    </div>
  );
}

export default App;