Why does my browser not showing like in tutorial

I follow the first few mins in the tutorial and somehow the instructor’s screen showed something but not mine.

I reconfirm on my end but looks like all are the same, yet no nothing shown in my browser.

        <link rel="stylesheet" href="index.css">
        <script crossorigin src="https://unpkg.com/react@18/umd/react.development.js"></script>
        <script crossorigin src="https://unpkg.com/react-dom@18/umd/react-dom.development.js"></script>
        <script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>
        <div id="root"></div>
        <script src = "index.js" type="text/babel"></script>

This is my index.html

ReactDom.render(<p>Hello World</p>, document.getElementById("root"))

this is my index.js


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Hi @garrentmh and welcome!!

I recommend you take breaks frecuently and even slow down when if is necessary.

I just started with React but you have a typo here: ReactDOM

I hope that helps. Happy coding!!

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Thanks carlosvisator,

I’ve changed to
ReactDOM.render(<h1>Hello World</h1>, document.getElementById("root"))

but nothing show up yet. weird.

I’m following this tutorial


When I tried in Scrimba, it works fine, but copy it to VS Code doesn’t seemed to show anything.

there’s 3 files on my end.

html, body {
    margin: 0;
    padding: 0;


        <link rel="stylesheet" href="index.css">
        <script crossorigin src="https://unpkg.com/react@17/umd/react.development.js"></script>
        <script crossorigin src="https://unpkg.com/react-dom@17/umd/react-dom.development.js"></script>
        <script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>
        <div id="root"></div>
        <script src="index.js" type="text/babel"></script>


ReactDOM.render(<h1>Hello, me</h1>, document.getElementById("root"))


1 Like

Hi again @garrentmh

It looks accurate, did you try directly in your HTML?

<script type="text/babel">
  ReactDOM.render(<h1>Hello, me</h1>, document.getElementById("root"));

Also, did you check if you need the new syntax for render components?

Rendering Elements | createRoot()

Good luck!!

You have to serve the page. Install an extension like Live Preview, or Five Server/Live Server.

You can use the old render method with React 18 but yes you are meant to use createRoot with 18. You get a warning in the console.

Warning: ReactDOM.render is no longer supported in React 18. Use createRoot instead. Until you switch to the new API, your app will behave as if it’s running React 17. Learn more: https://reactjs.org/link/switch-to-createroot

I’ve installed Live Preview and still nothing happened. Will try it out on the createRoot and see.

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https://codepen.io/, can you share your code here; it will be easier to debug

The code you posted works just fine for me when serving the page.

In any case, I would recommend using Vite and not the CDN links.

  • Install Node.js if you haven’t done so yet.

  • From a terminal run, npm create vite@latest and follow the prompts to create a React app.

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Got it. Currently I’m learning on Vite to see how it can run in case it doesn’t work on my machine.

1 Like

So how do I share?

is it the Pen Title ? My Pen Title is “Testing for React Course”

Google “how to share codepen link”.

Googling is the most important skill to achieve by all the developers

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