Create JSX Project

Create React folder in www with this code:

# Create a project folder
mkdir jsx-modules
cd jsx-modules

# Create an npm project without prompts (-y)
npm init -y

# Install babel
npm install @babel/cli @babel/core @babel/plugin-transform-react-jsx

Next we’ll need a .babelrc which will tell babel how to process our jsx.

{
  "plugins": [
    ["@babel/plugin-transform-react-jsx", { "pragma": "createElement", "pragmaFrag": "'fragment'" }]
  ],
  "comments": false
}

And then add an index.jsx file

// A jsx pragma method to create html dom elements
function createElement(tag, props, ...children) {
	if (typeof tag === "function") return tag(props, children)
	const element = document.createElement(tag)

	Object.entries(props || {}).forEach(([name, value]) => {
		if (name.startsWith('on') && name.toLowerCase() in window)
			element.addEventListener(name.toLowerCase().substr(2), value)
		else element.setAttribute(name, value.toString())
	})

	children.forEach((child) => {
		appendChild(element, child)
	})

	return element
}
const appendChild = (parent, child) => {
	if (Array.isArray(child))
		child.forEach((nestedChild) => appendChild(parent, nestedChild))
	else
		parent.appendChild(
			child.nodeType ? child : document.createTextNode(child)
		)
}
const createFragment = (props, ...children) => {
	return children
}

// Setup some data
const name = 'Geoff'
const friends = ['Sarah', 'James', 'Hercule']

// Create some dom elements
const app = (
  <div className="app">
    <h1 className="title"> Hello, world! </h1>
    <p> Welcome back, {name} </p>
    <p>
      <strong>Your friends are:</strong>
    </p>
    <ul>
      {friends.map(name => (
        <li>{name}</li>
      ))}
    </ul>
  </div>
)

// Render our dom elements
window.document.getElementById('app').replaceWith(app)

Now you can run this command to generate your javascript.

npx babel index.jsx -d dist

Which will create a new dist/index.js file with the transpilled code.

You can add // eslint-disable-next-line no-unused-vars to ignore annoying eslint errors

And to test our code, add an index.html

<!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>jsx WITHOUT react</title>
    <link
      rel="stylesheet"
      href="https://cdn.jsdelivr.net/gh/kognise/water.css@latest/dist/light.min.css"
    />
  </head>
  <body>
    <div id="app"></div>
    <script src="dist/index.js"></script>
  </body>
</html>

I snuck in water.css to make raw html prettier.

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