How to show an error message in React
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Displaying proper error messages is an essential aspect of error handling.
In this shot, we will go over a simple way to show error messages in React applications.
Simple, straightforward method
One way to display error messages is to have a state that stores them.
Let’s call this state errorMessage:
const [errorMessage, setErrorMessage] = useState('');
Now, whenever we encounter an error, we just update the errorMessage state:
setErrorMessage('Example error message!');
Then, display the error message using React conditional rendering. To keep things simple, we can just write an inline conditional statement:
{errorMessage && (
<p className="error"> {errorMessage} </p>
)}
Now, let’s put it all together. Here we have a button that, once clicked, displays the error message:
import React from 'react';
import ReactDOM from 'react-dom';
require('./style.css');
function App() {
const [errorMessage, setErrorMessage] = React.useState("");
const handleClick = () => {
setErrorMessage("Example error message!")
}
return (
<div className="App">
<button onClick={handleClick}>Show error message</button>
{errorMessage && <div className="error"> {errorMessage} </div>}
</div>
);
}
ReactDOM.render(
<App />,
document.getElementById('root')
);
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