Render React inline from a Jupyter notebook cell

Jupyter-React-integration.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Render React from a Jupyter notebook cell, and access Python as needed at runtime.\n",
    "\n",
    "The `%jsx` magic:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "application/javascript": [
       "\n",
       "// Load our libraries from a CDN instead of wherever this notebook is hosted.\n",
       "require.config({\n",
       "    paths: {\n",
       "        babel: 'https://unpkg.com/babel-standalone@6/babel.min',\n",
       "        react: 'https://unpkg.com/[email protected]/dist/react',\n",
       "        'react-dom': 'https://unpkg.com/[email protected]/dist/react-dom'\n",
       "    }\n",
       "})\n",
       "\n",
       "// Hook to call into Python.\n",
       "// Credit to disarticulate for documenting the usage of iopub: \n",
       "//    https://gist.github.com/disarticulate/d06069ff3e71cf828e5329beab8cb084\n",
       "window.python = code => new Promise((resolve, reject) => {\n",
       "    IPython.notebook.kernel.execute(\n",
       "        code,\n",
       "        {iopub: {output: data => resolve(data.content.text)}},\n",
       "    )   \n",
       "})\n"
      ],
      "text/plain": [
       "<IPython.core.display.Javascript object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "import json\n",
    "from string import Template\n",
    "\n",
    "from IPython.display import Javascript, display\n",
    "from IPython.core.magic import register_cell_magic\n",
    "\n",
    "\n",
    "display(Javascript('''\n",
    "// Load our libraries from a CDN instead of wherever this notebook is hosted.\n",
    "require.config({\n",
    "    paths: {\n",
    "        babel: 'https://unpkg.com/babel-standalone@6/babel.min',\n",
    "        react: 'https://unpkg.com/[email protected]/dist/react',\n",
    "        'react-dom': 'https://unpkg.com/[email protected]/dist/react-dom'\n",
    "    }\n",
    "})\n",
    "\n",
    "// Hook to call into Python.\n",
    "// Credit to disarticulate for documenting the usage of iopub: \n",
    "//    https://gist.github.com/disarticulate/d06069ff3e71cf828e5329beab8cb084\n",
    "window.python = code => new Promise((resolve, reject) => {\n",
    "    IPython.notebook.kernel.execute(\n",
    "        code,\n",
    "        {iopub: {output: data => resolve(data.content.text)}},\n",
    "    )   \n",
    "})\n",
    "'''))\n",
    "\n",
    "\n",
    "@register_cell_magic\n",
    "def jsx(line, cell):\n",
    "    display(Javascript((Template('''\n",
    "        require(['babel', 'react', 'react-dom'], (Babel, React, ReactDOM) => {\n",
    "            eval(Babel.transform($quoted_script, {presets: ['react']}).code)\n",
    "        })\n",
    "    ''').substitute(quoted_script=json.dumps(cell)))))"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Some Python state to access from React:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "greeting = 'Hello from Python and React!'"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "The punchline:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "application/javascript": [
       "\n",
       "        require(['babel', 'react', 'react-dom'], (Babel, React, ReactDOM) => {\n",
       "            eval(Babel.transform(\"python('print(greeting)').then(greeting => {\\n    ReactDOM.render(\\n      <h1>{greeting}</h1>,\\n      element[0],\\n    )\\n})\", {presets: ['react']}).code)\n",
       "        })\n",
       "    "
      ],
      "text/plain": [
       "<IPython.core.display.Javascript object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "%%jsx\n",
    "python('print(greeting)').then(greeting => {\n",
    "    ReactDOM.render(\n",
    "      <h1>{greeting}</h1>,\n",
    "      element[0],\n",
    "    )\n",
    "})"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.6.1"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}

JavaScript is disabled for gists, so you can't see the rendered output above. If you run the notebook yourself, you will see this as the final output:

Hello from Python and React!

Thanks for sharing this!