javascript 的index.html

Posted 2021-05-03

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<!DOCTYPE html>
<html>
<head>
   <meta charset="utf-8" />
   <meta http-equiv="X-UA-Compatible" content="IE=edge">
   <title>Counter Redux</title>
   <meta name="viewport" content="width=device-width, initial-scale=1">

   <!-- Redux CDN -->
   <script src="https://cdnjs.cloudflare.com/ajax/libs/redux/4.0.1/redux.min.js"></script>
</head>
<body>
   <!-- Render the store -->
   <p id="render-store"></p>
   <button id="add">+1</button>
   <button id="remove">-1</button>
   <button id="add10">+10</button>
   <button id="remove10">-10</button>
   <button id="reset">reset</button>

   <script src="main.js"></script>
</body>
</html>

 const addAction = {
    type: 'ADD',
 };

 const addAction10 = {
    type: 'ADD10',
 };
 
 const removeAction = {
    type: 'REMOVE',
 };

 const removeAction10 = {
    type: 'REMOVE10',
 };

 const resetAction = {
    type: 'RESET',
 };

 const counterReducer = (state = 0, action) => {
    switch (action.type) {
        case 'ADD':
            return state + 1;
        case 'REMOVE':
            return state - 1;
        case 'ADD10':
            return state + 10;
        case 'REMOVE10':
            return state - 10;
        case 'RESET':
            return state = 0;
        default:
            return state;
    }
 }

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

const renderStore = document.getElementById('render-store');
const render = () => {
   renderStore.innerHTML = store.getState();
}

store.subscribe(render);
render();

const add = document.getElementById('add');
add.addEventListener('click', () => {
   store.dispatch(addAction)
});

const add10 = document.getElementById('add10');
add10.addEventListener('click', () => {
   store.dispatch(addAction10)
});

const remove = document.getElementById('remove');
remove.addEventListener('click', () => {
   store.dispatch(removeAction)
});

const remove10 = document.getElementById('remove10');
remove10.addEventListener('click', () => {
   store.dispatch(removeAction10)
});

const reset = document.getElementById('reset');
reset.addEventListener('click', () => {
   store.dispatch(resetAction)
});

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javascript 的index.html