Dynamic HTML — Complete Guide
Dynamic HTML — Complete Guide: free step-by-step lesson with examples, common mistakes, and interview tips — part of HTML Tutorial on Toolliyo Academy.
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HTML Tutorial · Lesson 65 of 100
Dynamic HTML
Basics ✓ → Forms & semantics ✓ → APIs & performance → Projects
APIs & performance · 3 — HTML5, CSS/JS, security · ~10 min · HTML — with CSS & JavaScript
What is this?
Scripts build or replace HTML nodes at runtime from data or templates.
Why should you care?
MarkupVerse product grids render rows from JSON catalog responses.
See it live — copy this example
Save as demo.html and open in your browser, or use Run Example below.
<section aria-labelledby="catalog-h">
<h2 id="catalog-h">Plans</h2>
<div id="grid" class="plan-grid"></div>
</section>
<template id="plan-row">
<article class="plan-card"><h3></h3><p class="price"></p></article>
</template>
<script>
const plans = [{ name: 'Starter', price: '₹999/mo' }, { name: 'Scale', price: '₹4,999/mo' }];
const tpl = document.getElementById('plan-row');
plans.forEach(p => {
const node = tpl.content.cloneNode(true);
node.querySelector('h3').textContent = p.name;
node.querySelector('.price').textContent = p.price;
document.getElementById('grid').appendChild(node);
});
</script>
Run Example »
Edit the code below and click Run to see the result in Toolliyo’s live editor.
What happened?
- template content is inert until cloned.
- Prefer textContent over innerHTML for user data.
Practice next
- Define a template element.
- Clone and fill fields.
- Append to grid container.
- Add a third plan from fetch.
- Sort plans before render.
Remember
template + cloneNode. textContent for text. Container in HTML first.
MarkupVerse plan grid
Pricing page builds cards from JSON.
Outcome: Two plans appear without duplicate HTML.
Interview prep for this lesson
Practice these questions aloud after reading—each links to a full structured answer.
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