Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript React Basics (retired) Thinking in Components Decomposing our Application

Umeed Emad
PLUS
Umeed Emad
Courses Plus Student 1,150 Points
Posted by Umeed Emad
Umeed Emad
Courses Plus Student 1,150 Points

Getting this error with my code in console (Warning: Player(...): A valid React element (or null) must be returned...)

function Header(props){

    return(

        <div className="header">
            <h1>{props.title}</h1>
        </div>    

    );

}
Header.propTypes = {

    title: React.PropTypes.string.isRequired,
};

function Player(props){
    return
    (        
        <div className="player">
            <div className="player-name">
                {props.name}
            </div>

            <div className="player-score">
                <div className="counter">
                    <button className="counter-action decrement"> - </button>
                    <div className="counter-score">{props.score}</div>
                    <button className="counter-action increment"> + </button>
                </div>
            </div>
        </div>
    );    
}

Player.propTypes = {
  name: React.PropTypes.string.isRequired,
  score: React.PropTypes.number.isRequired,
};


function Application(props){   
    return(

        <div className="scoreboard">

            <Header title={props.title} />

            <div className="players">
                <Player name="Umeed Emad" score={50} />
                <Player name="Miad Emad" score={32} />
            </div>
        </div>
    );   
}

Application.defaultProps ={

    title: "Scoreboard",
}

ReactDOM.render(<Application />, document.getElementById('container'));

2 Answers

Nathan Gell
Nathan Gell
8,375 Points
Nathan Gell
Nathan Gell
8,375 Points

Hi Umeed,

In the return statement of your Player function class, place the opening parenthesis on the same line as the return keyword. I do this all the time!

Should look like this:

function Player(props){
    return (        
        <div className="player">
            <div className="player-name">
                {props.name}
            </div>

            <div className="player-score">
                <div className="counter">
                    <button className="counter-action decrement"> - </button>
                    <div className="counter-score">{props.score}</div>
                    <button className="counter-action increment"> + </button>
                </div>
            </div>
        </div>
    );    
}
Umeed Emad
PLUS
Umeed Emad
Courses Plus Student 1,150 Points
Umeed Emad
Umeed Emad
Courses Plus Student 1,150 Points

Thanks Nathan Gell Did not realize it could be the issue :)