CODEWITHSUNDEEP
javascriptreactjsreact-hooks
Joey
Joey

Reputation: 121

error when I import useContext to another component

I am trying to import the value of useContext but I am getting this error :

  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.

What I am missing here ?

AllThemeContext.js

import React, { createContext, useState } from "react";
export const AllContext = createContext();

const AllContextProvider = (props) => {
  const submittedInput = props.submittedInput;

  return (
    <AllContext.Provider value={{ submittedInput }}>
      {props.children}
    </AllContext.Provider>
  );
};

export default AllContextProvider;

logo.js

import React from "react";
import AllContextProvider from "../context/AllThemeContext";
import "./Logo.scss";
// Component
const Logo = () => {
  return (
    <AllContextProvider.Consumer>
      {(context) => {
        console.log(context);
      }}
    </AllContextProvider.Consumer>
  );
};
export default Logo;

Upvotes: 0

Views: 2036

Answers (2)

Oluwafemi Sule
Oluwafemi Sule

Reputation: 38922

You should import AllContext from AllThemeContext which is the named export and not the default export.

import React from "react";
import { AllContext } from "../context/AllThemeContext";
import "./Logo.scss";
// Component
const Logo = () => {
  return (
    <AllContext.Consumer>
      {(context) => {
        console.log(context);
      }}
    </AllContext.Consumer>
  );
};
export default Logo;

Upvotes: 1

Viet
Viet

Reputation: 12777

Because you don't return anything in the children of AllContextProvider.Consumer.

You need add return component:

  {(context) => {
    console.log(context);
    return <div>Hello world</div>
  }}

Upvotes: 0

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