after and before
after and before: 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 14 of 100
after and before
Setup & DOM → Events Effects AJAX → Perf & Integrate → Ship & Projects
Setup & DOM · 1 — Select · ~6 min · DOM Updates
What is this?
after() inserts siblings after the matched element; before() inserts siblings before it. Unlike append/prepend, the new nodes are peers, not children.
Why should you care?
QueryVerse inline editors often inject helper text or error spans beside a field without wrapping it.
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>
<p id="price" class="box">₹1,299</p>
<button type="button" id="noteAfter">Note after</button>
<button type="button" id="badgeBefore">Badge before</button>
<script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
<script>
$(function () {
$('#noteAfter').on('click', function () {
$('#price').next('.note').remove();
$('#price').after($('<p class="note muted"/>').text('Inclusive of GST'));
});
$('#badgeBefore').on('click', function () {
$('#price').prev('.badge').remove();
$('#price').before($('<span class="badge"/>').text('Sale'));
});
});
</script>
</body>
</html>
Run Example »
Edit the code below and click Run to see the result in Toolliyo’s live editor.
What happened?
- after/before operate on the sibling axis.
- insertAfter/insertBefore flip the call style.
- Remove previous helpers before re-injecting to avoid duplicates.
Practice next
- Click both buttons and inspect the DOM order.
- Click twice and confirm duplicates are prevented.
- Try $("#price").after("
"). - Inject an error span.before($input) on failed validate.
- Wrap with .wrap() instead when you need a parent.
Remember
after/before = siblings. Clean previous helpers first. Good for field-adjacent UI.
Price callout
An Myntra seller QueryVerse price row needs a GST note beside MRP during a festive sale.
Outcome: after() places the note as a sibling under the price.
Interview prep for this lesson
Practice these questions aloud after reading—each links to a full structured answer.
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