component in react js not rendering

Question

I have a component in React which I am importing in index.js, but it is giving this error: Nothing was returned from render. This usually means a return statement is missing. Or, to render nothing, return null

import React, { Component } from 'react';
import './App.css';

const Intro = (props) => {
  <p className="App-intro">
    To get started, edit <code>src/App.js</code> and save to reload
  </p>
}
class App extends Component {
  render() {
    return (
      <div className="App">
        <header className="App-header">

          <h1 className="App-title">TV Series list</h1>
        </header>
        <Intro />
      </div>
    );
  }
}

export default App;

logos_164 · Accepted Answer · 2018-06-21 19:30:38Z

1

Your code:

const Intro = (props) => {
  <p className="App-intro">
    To get started, edit <code>src/App.js</code> and save to reload
  </p>
}

Doesn't have a return statement.

If you wrap it within brackets {} then you need to have a return statement within the component. You don’t have to do this if it’s wrapped in parentheses though, because the syntax implies a return

Also, you’re not exporting Intro

edited Jun 21, 2018 at 19:30

answered Jun 21, 2018 at 18:58

logos_164

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5 Comments

Jakob Göran Thomasson Over a year ago

yep, this to :)

Jakob Göran Thomasson Over a year ago

const Intro = (props) => ( <p className="App-intro"> To get started, edit <code>src/App.js</code> and save to reload </p> ); works though

Jakob Göran Thomasson Over a year ago

You don't have to when used in same file, just if you want to reach it externally

Jakob Göran Thomasson Over a year ago

Yes it does, the return is implied in an arrow-function if you use that syntax. You can't do any logic with that method though, only what's inside the return.

logos_164 Over a year ago

That makes sense, if he executes it inside {} it’s a completely different syntax though, I think that would cause an error yeah? The server would be expecting a return statement inside of that, whereas if it’s just () the return is already implied

Hriday Modi · Accepted Answer · 2018-06-21 19:37:37Z

1

const Intro = (props) => (
  <p className="App-intro">
    To get started, edit <code>src/App.js</code> and save to reload
  </p>
)

OR

const Intro = (props) => {
  return (<p className="App-intro">
    To get started, edit <code>src/App.js</code> and save to reload
  </p>);
}

Here in your code you have used {} in arrow function body but it does not return anything, hence no element/component is rendering. You can return the value from arrow function using any of the above method. Here () assumes that the only statement in body is return statement while {} requires explicit return statement.

Probably your error statement is because Intro is one stateless component.

answered Jun 21, 2018 at 19:37

Hriday Modi

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Comments

Jakob Göran Thomasson · Accepted Answer · 2018-06-21 18:57:18Z

0

If your file is called index.js as you said, that's probably the error.

You have jsx in your code therefore your file must be named: index.jsx

:)

answered Jun 21, 2018 at 18:57

Jakob Göran Thomasson

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