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>
 <div id='root'></div>
 <script type="text/jsx" src="script.jsx"></script>
</body>
</html>

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 { combineReducers } = Redux;
const todoApp = combineReducers({
  todos,
  visibilityFilter
});

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

const { Component } = React;

let nextTodoId = 0;
class TodoApp extends Component {
  render() {
    return (
      <div>
        <input ref={node => {
          this.input = node;
        }} />
        <button onClick={() => {
          store.dispatch({
            type: 'ADD_TODO',
            text: this.input.value,
            id: nextTodoId++
          });
          this.input.value = '';
        }}>
          Add Todo
        </button>
        <ul>
          {this.props.todos.map(todo =>
            <li key={todo.id}
                onClick={() => {
                  store.dispatch({
                    type: 'TOGGLE_TODO',
                    id: todo.id
                  });         
                }}
                style={{
                  textDecoration:
                    todo.completed ?
                      'line-through' :
                      'none'
                }}>
              {todo.text}
            </li>
          )}
        </ul>
      </div>
    );
  }
}

const render = () => {
  ReactDOM.render(
    <TodoApp
      todos={store.getState().todos}
    />,
    document.getElementById('root')
  );
};

store.subscribe(render);
render();