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Created December 3, 2019 21:42
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Redux Tutorial Video 22 -- Extracting Container Components // source https://jsbin.com/neseqom
Raw
index.html
<!DOCTYPE html>
<html>
<head>
<meta name="description" content="Video 22 -- Extracting Container Components">
<meta charset="utf-8">
<title>Redux Tutorial</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/redux/4.0.4/redux.min.js"></script>
<script crossorigin src="https://unpkg.com/react@16/umd/react.development.js"></script>
<script crossorigin src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>
</head>
<body>
<div id='root'></div>
<script id="jsbin-javascript">
// So the downside of putting all of the reducers into the container is that we have to pass a lot of props around. Let's see if we can't do better!
// Notice, for instance, visibilityFilter => currentFilter, all over the place. Parents need to know to much about what children need so it breaks encapsulation.
'use strict';
var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();
var _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; desc = parent = getter = undefined; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };
var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };
function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }
function _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
var todo = function 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 _extends({}, state, {
completed: !state.completed
});
default:
return state;
}
};
// todos reducer
var todos = function todos(state, action) {
if (state === undefined) state = [];
switch (action.type) {
case 'ADD_TODO':
return [].concat(_toConsumableArray(state), [// return array with all items + new
todo(undefined, action) // calls child reducers
]);
case 'TOGGLE_TODO':
return state.map(function (t) {
return todo(t, action);
});
default:
return state;
}
};
var visibilityFilter = function visibilityFilter(state, action) {
if (state === undefined) state = 'SHOW_ALL';
switch (action.type) {
case 'SET_VISIBILITY_FILTER':
return action.filter;
default:
return state;
}
};
var _Redux = Redux;
var combineReducers = _Redux.combineReducers;
// This is the root reducer
var todoApp = combineReducers({
todos: todos,
visibilityFilter: visibilityFilter
});
var _Redux2 = Redux;
var createStore = _Redux2.createStore;
// combined reducer
var store = createStore(todoApp);
var _React = React;
var Component = _React.Component;
// react presentational component for utilizing visibility filter
var Link = function Link(_ref) {
var active = _ref.active;
var children = _ref.children;
var onClick = _ref.onClick;
if (active) {
return React.createElement(
'span',
null,
children
);
}
return React.createElement(
'a',
{ href: '#',
onClick: function (e) {
e.preventDefault();
onClick();
}
},
children
);
};
// container to provide data and behavior to presentational component
var FilterLink = (function (_Component) {
_inherits(FilterLink, _Component);
function FilterLink() {
_classCallCheck(this, FilterLink);
_get(Object.getPrototypeOf(FilterLink.prototype), 'constructor', this).apply(this, arguments);
}
// Container component
_createClass(FilterLink, [{
key: 'componentDidMount',
value: function componentDidMount() {
var _this = this;
// Unsubscribe() is returned by subscribe()
this.unsubscribe = store.subscribe(function () {
return _this.forceUpdate();
});
}
}, {
key: 'componentWillUnmount',
value: function componentWillUnmount() {
this.unsubscribe();
}
}, {
key: 'render',
value: function render() {
var props = this.props;
var state = store.getState();
// delegate rendering to presentational component.
return React.createElement(
Link,
{
active: props.filter === state.visibilityFilter,
onClick: function () {
return store.dispatch({
type: 'SET_VISIBILITY_FILTER',
filter: props.filter
});
}
},
props.children
); //return
}
}]);
return FilterLink;
})(Component);
var Footer = function Footer() {
return React.createElement(
'p',
null,
'Show:',
' ',
React.createElement(
FilterLink,
{
filter: 'SHOW_ALL'
},
'All'
),
', ',
React.createElement(
FilterLink,
{
filter: 'SHOW_ACTIVE'
},
'Active'
),
', ',
React.createElement(
FilterLink,
{
filter: 'SHOW_COMPLETED'
},
'Completed'
)
);
};
// Purely presentational Todo component
var Todo = function Todo(_ref2) {
var onClick = _ref2.onClick;
var completed = _ref2.completed;
var text = _ref2.text;
var id = _ref2.id;
return React.createElement(
'li',
{
onClick: onClick,
style: {
textDecoration: completed ? 'line-through' : 'none'
}
},
id,
': ',
text
);
};
// Purely presentational TodoList
var TodoList = function TodoList(_ref3) {
var todos = _ref3.todos;
var onTodoClick = _ref3.onTodoClick;
return React.createElement(
'ul',
null,
todos.map(function (todo) {
return React.createElement(Todo, _extends({
key: todo.id
}, todo, {
onClick: function () {
return onTodoClick(todo.id);
}
}));
})
);
};
// Purely presentational AddTodo
var AddTodo = function AddTodo(_ref4) {
var onAddClick = _ref4.onAddClick;
var input = undefined;
return React.createElement(
'div',
null,
React.createElement('input', { ref: function (node) {
input = node;
} }),
React.createElement(
'button',
{ onClick: function () {
onAddClick(input.value);
input.value = '';
} },
'Add Todo'
)
);
};
var getVisibleTodos = function getVisibleTodos(todos, filter) {
switch (filter) {
case 'SHOW_ALL':
return todos;
case 'SHOW_COMPLETED':
return todos.filter(function (t) {
return t.completed;
});
case 'SHOW_ACTIVE':
return todos.filter(function (t) {
return !t.completed;
});
}
};
var nextTodoId = 0;
// With the refactor of TodoList, AddTodo, and Footer, TodoApp() this is now acting as a container component.
var TodoApp = function TodoApp(_ref5) {
var todos = _ref5.todos;
var visibilityFilter = _ref5.visibilityFilter;
return React.createElement(
'div',
null,
React.createElement(AddTodo, {
onAddClick: function (text) {
return store.dispatch({
type: 'ADD_TODO',
id: nextTodoId++,
text: text
});
}
}),
React.createElement(TodoList, {
todos: getVisibleTodos(todos, visibilityFilter),
onTodoClick: function (id) {
return store.dispatch({
type: 'TOGGLE_TODO',
id: id
});
}
}),
React.createElement(Footer, null)
);
};
var render = function render() {
ReactDOM.render(
// passes to component as prop, every state filled in inside the state object.
React.createElement(TodoApp, store.getState()), document.getElementById('root'));
};
store.subscribe(render); // runs on any state change
render();
</script>
<script id="jsbin-source-javascript" type="text/javascript">// So the downside of putting all of the reducers into the container is that we have to pass a lot of props around. Let's see if we can't do better!
// Notice, for instance, visibilityFilter => currentFilter, all over the place. Parents need to know to much about what children need so it breaks encapsulation.
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
}
}
// todos reducer
const todos = (state = [], action) => {
switch (action.type) {
case 'ADD_TODO':
return [
...state, // return array with all items + new
todo(undefined, action) // calls child reducers
]
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
// This is the root reducer
const todoApp = combineReducers({
todos,
visibilityFilter
})
const { createStore } = Redux
// combined reducer
const store = createStore(todoApp)
const { Component } = React
// react presentational component for utilizing visibility filter
const Link = ({
active,
children,
onClick
}) => {
if (active) {
return <span>{children}</span>;
}
return (
<a href='#'
onClick={e => {
e.preventDefault();
onClick()
}}
>
{children}
</a>
);
};
// container to provide data and behavior to presentational component
class FilterLink extends Component {
componentDidMount() {
// Unsubscribe() is returned by subscribe()
this.unsubscribe = store.subscribe(() =>
this.forceUpdate()
);
}
componentWillUnmount() {
this.unsubscribe();
}
render() {
const props = this.props;
const state = store.getState();
// delegate rendering to presentational component.
return (
<Link
active={
props.filter ===
state.visibilityFilter
}
onClick = {() =>
store.dispatch({
type: 'SET_VISIBILITY_FILTER',
filter: props.filter
})
}
>
{props.children}
</Link>
); //return
}
}
// Container component
const Footer = () => (
<p>
Show:
{' '}
<FilterLink
filter='SHOW_ALL'
>
All
</FilterLink>
{', '}
<FilterLink
filter='SHOW_ACTIVE'
>
Active
</FilterLink>
{', '}
<FilterLink
filter='SHOW_COMPLETED'
>
Completed
</FilterLink>
</p>
);
// Purely presentational Todo component
const Todo = ({
onClick,
completed,
text,
id
}) => (
<li
onClick={onClick}
style={{
textDecoration:
completed ?
'line-through' :
'none'
}}
>
{id}: {text}
</li>
);
// Purely presentational TodoList
const TodoList = ({
todos,
onTodoClick
}) => (
<ul>
{todos.map(todo =>
<Todo
key={todo.id}
{...todo}
onClick={() => onTodoClick(todo.id)}
/>
)}
</ul>
);
// Purely presentational AddTodo
const AddTodo = ({
onAddClick
}) => {
let input;
return (
<div>
<input ref={node => {
input = node;
}} />
<button onClick = {() => {
onAddClick(input.value);
input.value='';
}}>
Add Todo
</button>
</div>
);
};
const getVisibleTodos = (
todos,
filter
) => {
switch (filter) {
case 'SHOW_ALL':
return todos;
case 'SHOW_COMPLETED':
return todos.filter(
t => t.completed
);
case 'SHOW_ACTIVE':
return todos.filter(
t => !t.completed
);
}
}
let nextTodoId = 0;
// With the refactor of TodoList, AddTodo, and Footer, TodoApp() this is now acting as a container component.
const TodoApp =({
todos,
visibilityFilter
}) => (
<div>
<AddTodo
onAddClick={text =>
store.dispatch({
type: 'ADD_TODO',
id: nextTodoId++,
text
})
}
/>
<TodoList
todos = {
getVisibleTodos(
todos,
visibilityFilter
)
}
onTodoClick = {id =>
store.dispatch({
type: 'TOGGLE_TODO',
id
})
}
/>
<Footer />
</div>
);
const render = () => {
ReactDOM.render(
// passes to component as prop, every state filled in inside the state object.
<TodoApp
{...store.getState()}
/>,
document.getElementById('root')
)
}
store.subscribe(render) // runs on any state change
render()</script></body>
</html>
Raw
jsbin.neseqom.js
// So the downside of putting all of the reducers into the container is that we have to pass a lot of props around. Let's see if we can't do better!
// Notice, for instance, visibilityFilter => currentFilter, all over the place. Parents need to know to much about what children need so it breaks encapsulation.
'use strict';
var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();
var _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; desc = parent = getter = undefined; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };
var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };
function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i]; return arr2; } else { return Array.from(arr); } }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }
function _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
var todo = function 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 _extends({}, state, {
completed: !state.completed
});
default:
return state;
}
};
// todos reducer
var todos = function todos(state, action) {
if (state === undefined) state = [];
switch (action.type) {
case 'ADD_TODO':
return [].concat(_toConsumableArray(state), [// return array with all items + new
todo(undefined, action) // calls child reducers
]);
case 'TOGGLE_TODO':
return state.map(function (t) {
return todo(t, action);
});
default:
return state;
}
};
var visibilityFilter = function visibilityFilter(state, action) {
if (state === undefined) state = 'SHOW_ALL';
switch (action.type) {
case 'SET_VISIBILITY_FILTER':
return action.filter;
default:
return state;
}
};
var _Redux = Redux;
var combineReducers = _Redux.combineReducers;
// This is the root reducer
var todoApp = combineReducers({
todos: todos,
visibilityFilter: visibilityFilter
});
var _Redux2 = Redux;
var createStore = _Redux2.createStore;
// combined reducer
var store = createStore(todoApp);
var _React = React;
var Component = _React.Component;
// react presentational component for utilizing visibility filter
var Link = function Link(_ref) {
var active = _ref.active;
var children = _ref.children;
var onClick = _ref.onClick;
if (active) {
return React.createElement(
'span',
null,
children
);
}
return React.createElement(
'a',
{ href: '#',
onClick: function (e) {
e.preventDefault();
onClick();
}
},
children
);
};
// container to provide data and behavior to presentational component
var FilterLink = (function (_Component) {
_inherits(FilterLink, _Component);
function FilterLink() {
_classCallCheck(this, FilterLink);
_get(Object.getPrototypeOf(FilterLink.prototype), 'constructor', this).apply(this, arguments);
}
// Container component
_createClass(FilterLink, [{
key: 'componentDidMount',
value: function componentDidMount() {
var _this = this;
// Unsubscribe() is returned by subscribe()
this.unsubscribe = store.subscribe(function () {
return _this.forceUpdate();
});
}
}, {
key: 'componentWillUnmount',
value: function componentWillUnmount() {
this.unsubscribe();
}
}, {
key: 'render',
value: function render() {
var props = this.props;
var state = store.getState();
// delegate rendering to presentational component.
return React.createElement(
Link,
{
active: props.filter === state.visibilityFilter,
onClick: function () {
return store.dispatch({
type: 'SET_VISIBILITY_FILTER',
filter: props.filter
});
}
},
props.children
); //return
}
}]);
return FilterLink;
})(Component);
var Footer = function Footer() {
return React.createElement(
'p',
null,
'Show:',
' ',
React.createElement(
FilterLink,
{
filter: 'SHOW_ALL'
},
'All'
),
', ',
React.createElement(
FilterLink,
{
filter: 'SHOW_ACTIVE'
},
'Active'
),
', ',
React.createElement(
FilterLink,
{
filter: 'SHOW_COMPLETED'
},
'Completed'
)
);
};
// Purely presentational Todo component
var Todo = function Todo(_ref2) {
var onClick = _ref2.onClick;
var completed = _ref2.completed;
var text = _ref2.text;
var id = _ref2.id;
return React.createElement(
'li',
{
onClick: onClick,
style: {
textDecoration: completed ? 'line-through' : 'none'
}
},
id,
': ',
text
);
};
// Purely presentational TodoList
var TodoList = function TodoList(_ref3) {
var todos = _ref3.todos;
var onTodoClick = _ref3.onTodoClick;
return React.createElement(
'ul',
null,
todos.map(function (todo) {
return React.createElement(Todo, _extends({
key: todo.id
}, todo, {
onClick: function () {
return onTodoClick(todo.id);
}
}));
})
);
};
// Purely presentational AddTodo
var AddTodo = function AddTodo(_ref4) {
var onAddClick = _ref4.onAddClick;
var input = undefined;
return React.createElement(
'div',
null,
React.createElement('input', { ref: function (node) {
input = node;
} }),
React.createElement(
'button',
{ onClick: function () {
onAddClick(input.value);
input.value = '';
} },
'Add Todo'
)
);
};
var getVisibleTodos = function getVisibleTodos(todos, filter) {
switch (filter) {
case 'SHOW_ALL':
return todos;
case 'SHOW_COMPLETED':
return todos.filter(function (t) {
return t.completed;
});
case 'SHOW_ACTIVE':
return todos.filter(function (t) {
return !t.completed;
});
}
};
var nextTodoId = 0;
// With the refactor of TodoList, AddTodo, and Footer, TodoApp() this is now acting as a container component.
var TodoApp = function TodoApp(_ref5) {
var todos = _ref5.todos;
var visibilityFilter = _ref5.visibilityFilter;
return React.createElement(
'div',
null,
React.createElement(AddTodo, {
onAddClick: function (text) {
return store.dispatch({
type: 'ADD_TODO',
id: nextTodoId++,
text: text
});
}
}),
React.createElement(TodoList, {
todos: getVisibleTodos(todos, visibilityFilter),
onTodoClick: function (id) {
return store.dispatch({
type: 'TOGGLE_TODO',
id: id
});
}
}),
React.createElement(Footer, null)
);
};
var render = function render() {
ReactDOM.render(
// passes to component as prop, every state filled in inside the state object.
React.createElement(TodoApp, store.getState()), document.getElementById('root'));
};
store.subscribe(render); // runs on any state change
render();
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