Getting a project setup is rarely easy. Luckily, we have a quick script that can do the work for us.

Running `> npm run setup` will do the following:

1. Install package dev dependencies

2. Create an output directory called "dist"

3. Install "concurrently" & "browser-sync" globally

4. Run our app in the browser

You'll find this "setup" script located in your *package.json*.

We'll be installing a lot of scripts from terminal. You may also want to consider installing the atom package ["platformio-ide-terminal"](https://github.com/platformio/platformio-atom-ide-terminal), which provides a terminal inside your editor.

The "single source of truth".

const store = createStore(reducer, initialState);

Events that change the data.

const action = { type: 'ACTION_NAME' };

const actionName = () => ({ type: 'ACTION_NAME' });

const ACTION_NAME = 'ACTION_NAME'

The data transformation

const reducer = (state) => {

console.log(state);

return state;

};

Reducers must be pure functions

State is "read only".

Notes

const nextPokemon = state.pokemon.map(p => {

if (id === p.id) {

p.votes += 1;

}

return p;

});

return {

pokemon: nextPokemon

};

```

Create modular, composable reducers with `combineReducers`.