I'm trying to use react hooks for a simple problem. I believe the solution is stupid but I don't see it. I Tried to see in my package.json but didn't found the solution. and I'm pretty sure that I'm declaring my state in a good way.
import React, { useEffect } from "react";
import "./App.css";
import Chuck from "./gettyimages-83457444-612x612.jpg";
import axios from "axios";
function App() {
const [state, setState] = useState({
joke: "",
});
useEffect(() => {
fetchData();
}, []);
const fetchData = async () => {
const result = await axios.get("");
console.log(result.data.value);
setState({ ...state, joke: result.data.value });
};
return (
<div className="container">
<div className="row">
<div className="col-6">
<h1 className="title">Chuck API</h1>
<img src={Chuck} alt="ChuckNoris" />
</div>
<div className="col-6 searchJokeCol">
<div className="card">
<div className="card-header">
<span>Search for the Phrase of Chuck</span>
</div>
<div className="card-body">
<input type="text"></input>
</div>
</div>
<div>
<button className="btn btn-warning btn-lg">Just CLICK!</button>
</div>
</div>
</div>
<h2 className="subTitle"> Here is The joke</h2>
<h4>{state.joke}</h4>
</div>
);
}
export default App; "dependencies": {
"@testing-library/jest-dom": "^4.2.4",
"@testing-library/react": "^9.5.0",
"@testing-library/user-event": "^7.2.1",
"axios": "^0.20.0",
"react": "^16.13.1",
"react-dom": "^16.13.1",
"react-scripts": "3.4.3",
"react-test-renderer": "^17.0.0-rc.1"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test",
"ejLine 7:29: 'useState' is not defined no-undef
3 Answers
You need to import "useState":
import React, { useEffect, useState } from "react";
I see that you have missed useState import.
Either you need to add like
import React, { useEffect, useState } from "react";
or make it React.useState i.e.
const [state, setState] = React.useState({
joke: "",
});
You have forgotten to import useState
import React, { useEffect, useState } from "react";
