反应 Typescript Material-UI 使用样式不可调用

Question

For some reason, I cannot call useStyles as it errors out the following:

 This expression is not callable. Type 'never' has no call signatures.ts(2349) const useStyles: never

Here is the full code:

 import { makeStyles, Theme } from "@material-ui/core"; import IconButton from "@material-ui/core/IconButton"; import AppBar from "@mui/material/AppBar"; import Toolbar from "@mui/material/Toolbar"; import { ReactComponent as HeaderLogo } from "../../images/logo.svg"; const useStyles = makeStyles((theme: Theme) => ({ root: { backgroundColor: theme.palette.VampirismBlack.main, } })); const Header = (): JSX.Element => { const classes = useStyles(); return ( <AppBar position="static"> <Toolbar variant="dense"> <HeaderLogo width="125" height="75" /> <IconButton> Home </IconButton> <IconButton> Changelog </IconButton> <IconButton> Tutorials </IconButton> <IconButton> Wiki </IconButton> <IconButton> Join Discord </IconButton> </Toolbar> </AppBar> ) } export default Header;

I've built a few different React applications before and never ran into this issue.

Any ideas?

Answer 1

The issue was that a newer version of Material-UI is being used.

import AppBar from "@mui/material/AppBar";
import IconButton from '@mui/material/IconButton';
import { Theme } from '@mui/material/styles';
import Toolbar from '@mui/material/Toolbar';
import { makeStyles } from "@mui/styles";
import { ReactComponent as HeaderLogo } from "../../images/logo.svg";

Answer 2

I believe makeStyles is being imported from the wrong package.

This

import { makeStyles, Theme } from "@material-ui/core";

Should be like

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

Answer 3

您可以通过从 '@mui/styles' 导入来解决它

import { makeStyles, createStyles } from '@mui/styles';

Answer 4

on MU-V5

1. Install the package // with npm npm install @mui/styles

// with yarn yarn add @mui/styles

2. Import from '@mui/styles' import { makeStyles } from '@mui/styles';

3. Build your code

import * as React from 'react';
import { makeStyles } from '@mui/styles';
import Button from '@mui/material/Button';

const useStyles = makeStyles({
  root: {
    background: 'linear-gradient(45deg, #FE6B8B 30%, #FF8E53 90%)',
    border: 0,
    borderRadius: 3,
    boxShadow: '0 3px 5px 2px rgba(255, 105, 135, .3)',
    color: 'white',
    height: 48,
    padding: '0 30px',
  },
});

export default function Hook() {
  const classes = useStyles();
  return <Button className={classes.root}>Hook</Button>;
}

This should works, it worked for me.

Answer 5

This is deprecated as of V5 Material-UI does not recommended the styles path for material UI. Instead MUI want you to rely on the sx attribute with CSS.

Hopes this helps anyone.

The current recommended way https://mui.com/system/basics/

 import * as React from "react"; import Button from "@mui/material/Button"; export default function Hook() { return ( <Button sx={{ border: 0, borderRadius: 3, boxShadow: "0 3px 5px 2px rgba(255, 105, 135,.3)", color: "white", height: 48, padding: "0 30px", }} > Hook </Button> ); }

This is the reason why: https://mui.com/system/styles/basics/#why-use-muis-styling-solution

---

For info on the makeStyles see documentation: @mui/styles (LEGACY)

On their documentation for styles: https://mui.com/system/styles/basics/

⚠️ @mui/styles is the legacy styling solution for MUI. It depends on JSS as a styling solution, which is not used in the @mui/material anymore, deprecated in v5. If you don't want to have both Emotion & JSS in your bundle, please refer to the @mui/system documentation which is the recommended alternative.