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So far, we’ve focused on writing JSX expressions. It’s similar to writing bits of HTML, but inside of a JavaScript file.

In this lesson, we’re going to add something new: regular JavaScript, written inside of a JSX expression, written inside of a JavaScript file.

Whoaaaa…

Instructions

1.

Starting on line 5, carefully write the following code. What do you think will appear in the browser?

ReactDOM.render(
  <h1>2 + 3</h1>,
  document.getElementById('app')
);

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