Koszyk z ilością i usuwaniem

Gotowy kod: Koszyk z ilością i usuwaniem

HTML

<section class="lab"><h2>Koszyk z ilością i usuwaniem</h2><p>Koszyk demonstracyjny, bez płatności.</p><div class="cart-items"></div><output class="cart-total"></output><button class="cart-reset">Przywróć produkty</button></section>

CSS

*{box-sizing:border-box}body{margin:0;padding:35px 24px;background:#f4f5ef;color:#293322;font:15px/1.7 Arial,sans-serif;min-height:100vh;display:grid;place-items:center}button,input{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #738858;outline-offset:4px}h2,h3,p{margin-top:0}[hidden]{display:none!important}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.lab{max-width:800px;margin:25px auto;padding:25px;border:1px solid #d4dec9;border-radius:14px;background:#fff;color:#273724;font:15px/1.6 system-ui,sans-serif;overflow-wrap:anywhere}.lab *{box-sizing:border-box}.lab h2{font-size:23px;margin:0 0 25px;line-height:1.3}.lab h3{line-height:1.3}.lab label{display:block;margin:10px 0}.lab input:not([type=checkbox]):not([type=radio]),.lab select,.lab textarea{font:inherit;padding:9px;border:1px solid #bac9ad;border-radius:6px;max-width:100%;background:#fff;color:#273724}.lab input[type=range]{width:100%;accent-color:#6f8e58}.lab input[type=color]{height:45px;width:70px}.lab input[type=checkbox]{accent-color:#6f8e58;margin-right:8px}.lab textarea{width:100%}.lab button{font:inherit;font-weight:600;border:0;border-radius:14px;background:#6f8e58;color:#fff;padding:10px 16px;cursor:pointer}.lab button:disabled{opacity:.45;cursor:default}.lab :focus-visible{outline:3px solid #315f8b;outline-offset:3px}.lab pre{white-space:pre-wrap;overflow-wrap:anywhere;background:#f0f4e9;padding:15px;font:12px/1.6 monospace}.lab table{border-collapse:collapse;width:100%}.lab th,.lab td{padding:10px;text-align:left;border-bottom:1px solid #d9e3ce}.lab progress{accent-color:#6f8e58}.lab .lab-hint{font-size:11px;color:#687861;border-top:1px solid #dbe3d0;padding-top:16px;margin-top:25px}.lab [hidden]{display:none!important}@media(max-width:480px){.lab{padding:16px;margin:10px auto}.lab h2{font-size:20px}.lab table{font-size:12px}.lab th,.lab td{padding:7px}}@media(prefers-reduced-motion:reduce){.lab *{animation:none!important;transition:none!important}}
.cart-items>div{display:flex;align-items:center;gap:10px;padding:15px 0;border-bottom:1px solid #d4dec8}.cart-items span{flex:1}.cart-items input{width:65px}.cart-total{display:block;font-size:28px;padding:25px 0;color:#6f8e58}

JavaScript

let items;const box=document.querySelector('.cart-items'),total=document.querySelector('.cart-total');function sum(){total.textContent='Razem: '+(items.reduce((n,p)=>n+p.price*p.qty,0)/100).toLocaleString('pl-PL',{style:'currency',currency:'PLN'})}function render(){box.replaceChildren();items.forEach((p,i)=>{const row=document.createElement('div'),name=document.createElement('span'),input=document.createElement('input'),remove=document.createElement('button');name.textContent=p.name+' · '+(p.price/100).toFixed(2)+' zł';input.type='number';input.min='1';input.max='99';input.value=p.qty;input.setAttribute('aria-label','Ilość: '+p.name);input.onchange=()=>{p.qty=Math.min(99,Math.max(1,Math.trunc(Number(input.value)||1)));input.value=p.qty;sum()};remove.textContent='Usuń';remove.onclick=()=>{items.splice(i,1);render()};row.append(name,input,remove);box.append(row)});if(!items.length)box.textContent='Koszyk jest pusty.';sum()}function reset(){items=[{name:'Notes',price:2490,qty:1},{name:'Plakat',price:3990,qty:2}];render()}document.querySelector('.cart-reset').onclick=reset;reset();