E-Commerce Frontend — ScriptVerse Project
E-Commerce Frontend — ScriptVerse Project: free step-by-step lesson with examples, common mistakes, and interview tips — part of JavaScript Tutorial on Toolliyo Academy.
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JavaScript Tutorial · Lesson 94 of 100
E-Commerce Frontend
Basics ✓ → Objects & data ✓ → Async & DOM ✓ → Advanced ✓ → Tools ✓ → Projects
Professional · 6 — Build projects · ~10 min · JS Projects
What is this?
Build a mini storefront: product grid, add to cart, and cart total — no backend required at first.
Why should you care?
E-commerce patterns appear in countless interviews and jobs.
See it live — copy this example
Paste into an HTML file or the browser console (F12). Use Run below when the live editor is available.
<!DOCTYPE html>
<html><body>
<div id="products"></div><p>Cart: <span id="count">0</span> items</p>
<script>
const products = [{ id:1,name:"Shirt",price:799},{ id:2,name:"Mug",price:299 }];
const cart = [];
function render() {
document.getElementById("products").innerHTML = products.map(p =>
`<div><button data-id="${p.id}">Add ${p.name} ₹${p.price}</button></div>`).join("");
document.getElementById("count").textContent = cart.length;
}
document.getElementById("products").addEventListener("click", e => {
if (e.target.matches("button[data-id]")) {
const p = products.find(x => x.id == e.target.dataset.id);
cart.push(p);
render();
}
});
render();
</script></body></html>Run Example »
Edit the code below and click Run to see the result in Toolliyo’s live editor.
What happened?
- cart array holds products.
- Update badge count and total price on each add.
Practice next
- Render product buttons from array.
- Use event delegation for Add clicks.
- Update cart badge count.
- Show cart total price sum below item count.
- Add Remove last item button that pops cart array.
Remember
Product list + cart array localStorage optional Classic frontend project
ScriptVerse storefront
Mini shop demo shows add-to-cart and badge count for portfolio without backend.
Outcome: E-commerce state patterns transfer directly to React/Redux later.
Interview prep for this lesson
Practice these questions aloud after reading—each links to a full structured answer.
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