React Uncaught Error: Target container is not a DOM element [duplicate]
React Uncaught Error: Target container is not a DOM element [duplicate]
The way you have it it runs before you even have DOM.
You should include it in the bottom like so:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>REACT TEST</title>
</head>
<body>
<div id="app"></div>
<script src="./bundle.js"></script>
</body>
</html>React Uncaught Error: Target container is not a DOM element [duplicate]
You are inserting your React script before the initialization of the container. Make it like this:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>REACT TEST</title>
</head>
<body>
<div id="app"></div>
<script src="./bundle.js"></script>
</body>
</html>