Hello, esterday I started React Challenges
And here I got stuped question
At first I just run example from React native page
and it run correctly
then I run some examples which I wrote on the brackets then inqlude some link to the codepen library
and it alsaw run fine.
But when I just copy paste the code from React native page it did not run
Here is my code codepen
On HTML area
ReactDOM.render( <h1>Hello, world!</h1>, document.getElementById('root') );
But nothing happened
when I run Ctr+Shif+j the error is
Uncaught SyntaxError: Unexpected token </h1>
What I must to do what is wrong?