'SyntaxError: 不能在模块外使用 import 语句'

Question

enter image description here This problem occurred while importing createGlobalStyle from styled-components. I also tried adding "type": "module" to the package.json file, but nothing meaningful.

[ GlobalStyle.jsx ]

    import { createGlobalStyle } from "styled-components";
// eslint-disable-next-line
import React from 'react';

const GlobalStyle = createGlobalStyle` 
    body {
        width: 100%;
        margin: 0;
    }
`; 

export default GlobalStyle; 

[ package.json ]

{
  "name": "dev-lio",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@testing-library/jest-dom": "^5.16.4",
    "@testing-library/react": "^13.3.0",
    "@testing-library/user-event": "^13.5.0",
    "react": "^18.1.0",
    "react-dom": "^18.1.0",
    "react-router-dom": "^6.3.0",
    "react-scripts": "^5.0.1",
    "web-vitals": "^2.1.4"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": [
      "react-app",
      "react-app/jest"
    ]
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  },
  "devDependencies": {
    "babel-plugin-styled-components": "^2.0.7"
  }
}

Any advice would be appreciated.

[ login.jsx ]

import React from 'react'
import GlobalStyle from '../../components/GlobalStyle';
import GlobalFonts from '../../fonts/fonts'
import LoginForm from '../../components/LoginForm';

const Login = () => {
    return (
        <div>
            <LoginForm />
            <GlobalFonts />
            <GlobalStyle />
        </div>
    )
}

export default Login;

[ index.jsx ]

import React from 'react'
import GlobalStyle from '../../components/GlobalStyle';
import Header from '../../components/Header';
import Profile from '../../components/Profile';
import GlobalFonts from '../../fonts/fonts';

const Main = () => {
    return (
        <div>
            <Header />
            <Profile />
            <GlobalFonts />
            <GlobalStyle />
        </div>
    )
}

export default Main;

It is in the above two files where GlobalStyle is used.

Answer 1

import { createGlobalStyle } from "styled-components";

This import tag would imply that createGlobalStyle was not exported as default. If you try to import a named value as default it will throw an error.

import createGlobalStyle from 'styled-components' 

would be the correct usage for a default export

You could also try module.export, But I have never needed to use this in react. and most of the time the issue is in how I have implemented default/named imports