eggheadio-projects/getting-started-with-redux: null

<!DOCTYPE html>
<html>
<head>
 <meta charset="utf-8">
 <title>Plunker</title>
 <script src="https://unpkg.com/react@16.3.2/umd/react.production.min.js"></script>
 <script src="https://unpkg.com/react-dom@16.3.2/umd/react-dom.production.min.js"></script>
 <script src="https://unpkg.com/babel-standalone@6.26.0/babel.min.js"></script>

 <script src="https://unpkg.com/redux@4.0.0/dist/redux.js"></script>
 <script src="https://unpkg.com/react-redux@5.0.7/dist/react-redux.js"></script>
</head>
<body>
 <h2>Open console to view results!</h2>
 <div id='root'></div>
 <script type="text/jsx" src="script.jsx"></script>
</body>
</html>

/*
 * Open the console
 * to see the state log.
 */

const todo = (state, action) => {
  switch (action.type) {
    case 'ADD_TODO':
      return {
        id: action.id,
        text: action.text,
        completed: false
      };
    case 'TOGGLE_TODO':
      if (state.id !== action.id) {
        return state;
      }

      return {
        ...state,
        completed: !state.completed
      };
    default:
      return state;
  }
};

const todos = (state = [], action) => {
  switch (action.type) {
    case 'ADD_TODO':
      return [
        ...state,
        todo(undefined, action)
      ];
    case 'TOGGLE_TODO':
      return state.map(t => todo(t, action));
    default:
      return state;
  }
};

const visibilityFilter = (
  state = 'SHOW_ALL',
  action
) => {
  switch (action.type) {
    case 'SET_VISIBILITY_FILTER':
      return action.filter;
    default:
      return state;
  }
};

const todoApp = (state = {}, action) => {
  return {
    todos: todos(
      state.todos,
      action
    ),
    visibilityFilter: visibilityFilter(
      state.visibilityFilter,
      action
    )
  };
};

const { createStore } = Redux;
const store = createStore(todoApp);

console.log('Initial state:');
console.log(store.getState());
console.log('--------------');

console.log('Dispatching ADD_TODO.')
store.dispatch({
  type: 'ADD_TODO',
  id: 0,
  text: 'Learn Redux'
});
console.log('Current state:');
console.log(store.getState());
console.log('--------------');

console.log('Dispatching ADD_TODO.');
store.dispatch({
  type: 'ADD_TODO',
  id: 1,
  text: 'Go shopping'
});
console.log('Current state:');
console.log(store.getState());
console.log('--------------');

console.log('Dispatching TOGGLE_TODO.');
store.dispatch({
  type: 'TOGGLE_TODO',
  id: 0
});
console.log('Current state:');
console.log(store.getState());
console.log('--------------');

console.log('Dispatching SET_VISIBILITY_FILTER');
store.dispatch({
  type: 'SET_VISIBILITY_FILTER',
  filter: 'SHOW_COMPLETED'
});
console.log('Current state:');
console.log(store.getState());
console.log('--------------');



// display in plunker preview
function displayInPreview(string) {
  var newDiv = document.createElement("div");
  var newContent = document.createTextNode(string);
  newDiv.appendChild(newContent);
  document.body.appendChild(newDiv)
}