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Created December 2, 2019 23:43
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Redux Tutorial Video 15 // source https://jsbin.com/neseqom
Raw
index.html
<!DOCTYPE html>
<html>
<head>
<meta name="description" content="Video 15">
<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 src="https://wzrd.in/standalone/expect@latest"></script>
<script src="https://wzrd.in/standalone/deep-freeze@latest"></script>
</head>
<body>
<script id="jsbin-javascript">
// Let's take this reducer for a spin in Redux!
// Representing state as an array is all good and well,
// but how far can it take us? What if we want to add a
// visibility filter?
'use strict';
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); } }
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;
}
};
var todos = function todos(state, action) {
if (state === undefined) state = [];
switch (action.type) {
case 'ADD_TODO':
return [].concat(_toConsumableArray(state), [todo(undefined, action)]);
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;
}
};
// Let's implement combineReducers from scratch!
var combineReducers = function combineReducers(reducers) {
return function (state, action) {
if (state === undefined) state = {};
// reducers return a reducer!
return Object.keys(reducers).reduce( // call reducers for each key, fills the empty state below...
function (nextState, key) {
nextState[key] = reducers[key]( // corresponding reducers by given key
state[key], // corresponding state by given key
action);
return nextState;
}, {} // Initial next state before keys are processed.
);
};
};
// Mapping of state to reducers.
var todoApp = combineReducers({
todos: todos,
visibilityFilter: visibilityFilter
});
var _Redux = Redux;
var createStore = _Redux.createStore;
var 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: 'Feed the Hamster'
});
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('--------------');
</script>
<script id="jsbin-source-javascript" type="text/javascript">// Let's take this reducer for a spin in Redux!
// Representing state as an array is all good and well,
// but how far can it take us? What if we want to add a
// visibility filter?
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;
}
}
// Let's implement combineReducers from scratch!
const combineReducers = (reducers) => {
return (state = {}, action) => { // reducers return a reducer!
return Object.keys(reducers).reduce( // call reducers for each key, fills the empty state below...
(nextState, key) => {
nextState[key] = reducers[key]( // corresponding reducers by given key
state[key], // corresponding state by given key
action
);
return nextState
},
{} // Initial next state before keys are processed.
);
};
};
// Mapping of state to reducers.
const todoApp = combineReducers({
todos,
visibilityFilter
})
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: 'Feed the Hamster'
})
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('--------------')
</script></body>
</html>
Raw
jsbin.neseqom.js
// Let's take this reducer for a spin in Redux!
// Representing state as an array is all good and well,
// but how far can it take us? What if we want to add a
// visibility filter?
'use strict';
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); } }
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;
}
};
var todos = function todos(state, action) {
if (state === undefined) state = [];
switch (action.type) {
case 'ADD_TODO':
return [].concat(_toConsumableArray(state), [todo(undefined, action)]);
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;
}
};
// Let's implement combineReducers from scratch!
var combineReducers = function combineReducers(reducers) {
return function (state, action) {
if (state === undefined) state = {};
// reducers return a reducer!
return Object.keys(reducers).reduce( // call reducers for each key, fills the empty state below...
function (nextState, key) {
nextState[key] = reducers[key]( // corresponding reducers by given key
state[key], // corresponding state by given key
action);
return nextState;
}, {} // Initial next state before keys are processed.
);
};
};
// Mapping of state to reducers.
var todoApp = combineReducers({
todos: todos,
visibilityFilter: visibilityFilter
});
var _Redux = Redux;
var createStore = _Redux.createStore;
var 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: 'Feed the Hamster'
});
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('--------------');
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