Dynamic List Rendering
Dynamic List Rendering: free step-by-step lesson with examples, common mistakes, and interview tips — part of jQuery Tutorial on Toolliyo Academy.
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jQuery Tutorial · Lesson 60 of 100
Dynamic List Rendering
Setup & DOM ✓ → Events Effects AJAX ✓ → Perf & Integrate → Ship & Projects
Perf & Integrate · 3 — Harden · ~10 min · Traversal and Plugins
What is this?
Render lists by emptying a container and appending nodes built with $("
").text(...). Prefer text over html. Delegate events on the parent once.Why should you care?
Almost every QueryVerse index page is a dynamic list fed by JSON.
See it live — copy this example
Examples include the jQuery 3.7 CDN. Paste into an HTML file or use Run Example to preview.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>QueryVerse</title>
<style>
body { font-family: system-ui, sans-serif; margin: 1.25rem; }
.box { padding: .75rem; border: 1px solid #ccc; border-radius: 8px; margin: .5rem 0; }
.muted { color: #666; }
button { margin-right: .35rem; margin-top: .35rem; }
input, select, textarea { margin: .25rem 0; }
table { border-collapse: collapse; width: 100%; }
th, td { border: 1px solid #ddd; padding: .4rem .55rem; text-align: left; }
.hidden { display: none; }
.row-odd { background: #f7f7f7; }
.active { font-weight: 700; }
.toast { background: #111; color: #fff; padding: .5rem .75rem; border-radius: 6px; }
</style>
</head>
<body>
<button type="button" id="load">Load comments</button>
<ul id="list" class="box"></ul>
<script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
<script>
$(function () {
$('#list').on('click', '.pin', function () {
$(this).closest('li').toggleClass('active');
});
$('#load').on('click', function () {
$.getJSON('https://jsonplaceholder.typicode.com/comments?postId=1')
.done(function (rows) {
var $list = $('#list').empty();
rows.slice(0, 5).forEach(function (c) {
var $li = $('<li/>').append($('<strong/>').text(c.name + ': ')).append(document.createTextNode(c.body.slice(0, 60) + '…'));
$li.append(' ').append($('<button type="button" class="pin"/>').text('Pin'));
$list.append($li);
});
})
.fail(function () {
$('#list').text('Could not load');
});
});
});
</script>
</body>
</html>
Run Example »
Edit the code below and click Run to see the result in Toolliyo’s live editor.
What happened?
- Build document fragments mentally: empty once, append many.
- Escape with text/createTextNode.
- Keep delegation outside the load handler so it is not rebound.
Practice next
- Load comments and pin one.
- Reload and confirm pins reset with new nodes.
- Slice a different length.
- Use a tag if the browser baseline allows.
- Show an empty-state li when rows.length===0.
Remember
empty + append pattern. text for safety. Delegate once on parent.
Comments pane
A Notion-like QueryVerse task pane for a Chennai design team loads discussion JSON.
Outcome: Dynamic render + delegated Pin stays correct across reloads.
Interview prep for this lesson
Practice these questions aloud after reading—each links to a full structured answer.
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