There’s a rule that we haven’t mentioned: a JSX expression must have exactly one outermost element.
In other words, this code will work:
const paragraphs = ( <div id="i-am-the-outermost-element"> <p>I am a paragraph.</p> <p>I, too, am a paragraph.</p> </div> );
But this code will not work:
const paragraphs = ( <p>I am a paragraph.</p> <p>I, too, am a paragraph.</p> );
The first opening tag and the final closing tag of a JSX expression must belong to the same JSX element!
It’s easy to forget about this rule, and end up with errors that are tough to diagnose.
If you notice that a JSX expression has multiple outer elements, the solution is usually simple: wrap the JSX expression in a
Your friend’s blog is down! He’s asked you to fix it.
You immediately diagnose the problem: a JSX expression with multiple outer elements.
Repair your friend’s broken code by wrapping their JSX in a