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+<!DOCTYPE html>
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+<html>
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+<head>
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+ <meta charset="utf-8">
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+ <title>Redux</title>
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+</head>
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+<body>
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+
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+ <!-- <input type="text" id="tovar"> -->
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+ <select id='tovar'>
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+ <option value="пиво">пиво</option>
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+ <option value="чипсы">чипсы</option>
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+ <option value="сиги">сиги</option>
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+ </select>
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+ <input type="number" id="skok">
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+ <button id="btn">Купить</button>
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+
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+ <script>
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+ function reducer(state, {type, ШО, СКОКА}){
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+ if (!state){
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+ return {
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+ пиво: 100,
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+ чипсы: 100,
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+ сиги: 100
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+ }
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+ }
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+ if (type === 'КУПИТЬ'){
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+ return {
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+ ...state,
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+ [ШО]: state[ШО] - СКОКА
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+ }
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+ }
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+ return state;
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+ }
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+
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+
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+ function createStore(reducer){
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+ let state = reducer(undefined, {})
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+ let cbs = []
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+
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+ const getState = () => state
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+ const subscribe = cb => (cbs.push(cb),
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+ () => cbs = cbs.filter(c => c !== cb));
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+ const dispatch = action => {
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+ const newState = reducer(state, action)
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+ if (newState !== state){
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+ state = newState
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+ for (let cb of cbs) cb()
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+ }
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+ }
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+
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+ return {
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+ getState,
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+ dispatch,
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+ subscribe
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+ }
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+ }
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+
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+ let store=createStore(reducer);
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+ btn.onclick=function(){
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+ for(let [key] of Object.entries(store.getState())){
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+ if(tovar.value===key){
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+ store.dispatch({type: 'КУПИТЬ', ШО: tovar.value, СКОКА: skok.value});
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+ console.log(store.getState())
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+ }
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+ }
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+ }
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+
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+ let table=document.createElement('table');
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+ for(let [key,value] of Object.entries(store.getState())){
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+ let tr=document.createElement('tr');
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+ let td=document.createElement('td');
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+ td.innerText=key+':'+value;
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+ tr.append(td);
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+ table.append(tr);
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+ }
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+ document.body.append(table);
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+
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+
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+
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+ const unsubscribe=store.subscribe(()=>{
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+ while (table.hasChildNodes()) {
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+ table.removeChild(table.firstChild);
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+ }
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+ for(let [key,value] of Object.entries(store.getState())){
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+ let tr=document.createElement('tr');
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+ let td=document.createElement('td');
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+ td.innerText=key+':'+value;
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+ tr.append(td);
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+ table.append(tr);
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+ }
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+ document.body.append(table);
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+ })
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+
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+ /*zakup.onclick=function(){
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+ for(let [key] of Object.entries(store.getState())){
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+ if(tovar.value===key){
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+ store.dispatch({type: 'КУПИТЬ', ШО: tovar.value, СКОКА: skok.value});
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+ console.log(store.getState())
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+ }
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+ }
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+ }*/
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+
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+
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+
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+ console.log(store.getState());
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+
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+
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+
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+
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+
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+
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+ </script>
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+</body>
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+</html>
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