Ada React Workshop file initial instruction

STEP 1: Open index.html file

1. Add necessary scripts to from_scratch/index.html file. You can do that after #example1 element.

       <script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.4.2/react.js"></script>
       <script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.4.2/react-dom.js"></script>
       <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.21.1/babel.min.js"></script>

   First one allows you to use React. The second one adds ReactDOM - it's a glue between React and a browser - allows you to render React elements on your page. The third one, babel, allows you to use modern syntax of ES6 directly in a browser.

2. Add a custom script tag after scripts from STEP 1. You need to add an attribute type="text/babel" to be compiled by babel.

       <script type="text/babel">
           // your app
       </script>

3. Create your own JSX element in the script tag, it can be e.g. <h1/> as below. Put your name in the element. Assign it to the variable. You have an example below:

       <script type="text/babel">
           const myName = <h1> I am Marta </h1>
       </script>

4. Run the app in your browser. So far, nothing happened. That's because we need to render it in the browser first! You need to use ReactDOM.render.

   That method that has two params: JSX element to render and the element from your DOM tree that will be parent of our object: ReactDOM.render(<jsxElement/>, parentElementFromDOM)

   Take a look at our HTML - there's an element with id #example1 - let's mount it there!

       <script type="text/babel">
           const myName = <h1> I am Marta </h1>
           ReactDOM.render(
               myName,
               document.getElementById("example1")
           );
       </script>

5. It is THAT simple to use React. Let's go a bit deeper with rules that are applied to JSX. Open index-2.html file and start with exercises there. Once you solve one, uncomment line comments of the next one. We're here if you need help :)

6. Once you finished, wait for a checkpoint and switch to the next branch called 1-the-letter, we'll start the real fun now. I cannot wait!