Error: The component you are trying to use must be exported from the file where it is defined. Make sure that you have exported it properly, or check if you have mistakenly used

I'm seeking assistance in resolving an issue I'm facing. Despite attempting to tackle the import functions, I continue to encounter an error. Removing "{}" also proved unsuccessful. Any help would be greatly appreciated. Currently enrolled in TylerMcginnis React-Redux course. Navigation.js

import React from 'react'
import PropTypes  from 'prop-types'
import Link  from 'react-router-dom'
import { container, navContainer, link } from './styles.css'

Navigation.propTypes = ActionLinks.propTypes = NavLinks.propTypes = {
  isAuthed: PropTypes.bool.isRequired,
}

function NavLinks ({isAuthed}) {
  return (isAuthed === true
    ? <ul>
        <li><Link to='/' className={link}>{'Home'}</Link></li>
      </ul>
    : <noscript />)
}

function ActionLinks ({isAuthed}) {
  return (isAuthed === true
    ? <ul>
        <li>NEW DUCK</li>
        <li><Link to='/logout' className={link}>{'Logout'}</Link></li>
      </ul>
    : <ul>
        <li><Link to='/' className={link}>{'Home'}</Link></li>
        <li><Link to='/auth' className={link}>{'Authenticate'}</Link></li>
      </ul>)
}

export default function Navigation  ({isAuthed}) {
  return (
    <div className={container}>
      <nav className={navContainer}>
        <NavLinks isAuthed={isAuthed} />
        <ActionLinks isAuthed={isAuthed} />
      </nav>
    </div>
  )
}

MainContainer.js

import React from 'react'
import  Navigation from '../../components/Navigation/Navigation'
import {container, innerContainer}  from './styles.css'
import createReactClass from 'create-react-class'


const MainContainer = createReactClass({
  render () {
    return (
      <div className={container}>
        <Navigation isAuthed={true} />
        <div className={innerContainer}>
          {this.props.children}
        </div>
      </div>
    )
  },
})

export default MainContainer

Error Message: Uncaught Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in, or you might have mixed up default and named imports. at invariant (invariant.js:42)

Answer №1

When I was trying to import a component, I encountered an error because of the way I was importing it.

import { Calculator } from './src/calculator';

To resolve the issue, I made a small adjustment to my import statement and it fixed the problem.

import Calculator from './src/calculator';

Answer №2

Hey @Harsha, I ran into the same problem recently. It took me quite some time to figure out what was causing it. After checking and double-checking my code, I decided to simplify everything as much as possible.

Turns out, the issue was that I accidentally copied an empty file into my component directory instead of using the correct file in another directory with the same name. No wonder I was getting errors!

Oh, and don't forget to always include those semi-colons at the end of your statements. It really does make a difference! ;)

Answer №3

I had a similar experience recently. It turns out that the issue was related to not properly saving the file. Perhaps you were only saving the main App.js file and not the individual component files. I had been consistently saving using ctrl+S, mistakenly thinking it was saving all files... After some troubleshooting in VS Code, I discovered how to set "Save all" to ctrl+shift+S under File/Preferences/Keyboard shortcuts.

Answer №4

Ensure that you are not importing or utilizing an empty component

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