Add ES5 example to Tutorial

[bvaughn]

This issue was originally reported by @quadruplejump via facebook/react/issues/10147

Text of original issue:

The tutorials, with the exception of the "advanced guides", assume ES6/JSX.

The React without ES6 tutorial https://facebook.github.io/react/docs/react-without-es6.html still uses JSX.

The React without JSX tutorial https://facebook.github.io/react/docs/react-without-jsx.html still uses ES6.

What would a simple ES5 React demo look like?

To compare, the Vue introduction https://vuejs.org/v2/guide/ starts with very simple examples that you can just drop in a webpage.

Note from Dan

We can probably add an intro paragraph to both of these pages that links to HTML page with minimal example.

Note from Brian

Pending the outcome of #122, it might be nice to host the new minimal example in the repo and display it in CodeSandbox/Codepen.

[M-ZubairAhmed]

Hi,
i have made this simple gist & pen to demonstrate simple react without jsx or es6 by following similar approach of 'getting started with Vue.js" guide.
Is this something you are looking for?

[quadruplejump]

@M-ZubairAhmed that would've been helpful months ago :D Do you need the code in the JS panel of the pen? render is being called twice with no obvious reason why

[M-ZubairAhmed]

yes you are right I don't need one more render method. So does this solve the issue ? or should I include anything more.

[isaacsolo]

Is there anything else that needs to be done here? I'd be happy to finish it.

[brettdewoody]

@bvaughn Is this issue still in need of being completed? While I think some would find a non-ES6/JSX demo useful, it's now 2 years on since this issue was raised and ES6 is much more standard.

[davidbarratt]

It would be really helpful to see an ES5 example that uses functional components.

[MiryamMann]

Hi, I'd like to contribute to this issue. Are there any remaining items that I can work on?