Modal Confirm Pattern

Modal Confirm Pattern: free step-by-step lesson with examples, common mistakes, and interview tips — part of jQuery Tutorial on Toolliyo Academy.

8 min read Updated 8/23/2026

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jQuery Tutorial · Lesson 75 of 100

Modal Confirm Pattern

Setup & DOM ✓ → Events Effects AJAX ✓ → Perf & Integrate → Ship & Projects

Perf & Integrate · 3 — Harden · ~10 min · App Integration

What is this?

Replace window.confirm with an in-page modal: show overlay, focus the primary action, resolve a Deferred/Promise on OK/Cancel, then run the destructive AJAX.

Why should you care?

QueryVerse delete actions in enterprises often must be keyboard-accessible and branded.

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="del">Delete invoice</button>
  <div id="mask" class="box hidden">
    <p>Delete invoice #441?</p>
    <button type="button" id="ok">Delete</button>
    <button type="button" id="cancel">Cancel</button>
  </div>
  <p id="out" class="muted"></p>
<script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
<script>
$(function () {
  function confirmQV() {
    var d = $.Deferred();
    $('#mask').removeClass('hidden');
    $('#ok').one('click', function () { $('#mask').addClass('hidden'); d.resolve(true); });
    $('#cancel').one('click', function () { $('#mask').addClass('hidden'); d.resolve(false); });
    return d.promise();
  }
  $('#del').on('click', function () {
    confirmQV().done(function (yes) {
      $('#out').text(yes ? 'Deleted (mock)' : 'Cancelled');
    });
  });
});
</script>
</body>
</html>

Run Example »

Edit the code below and click Run to see the result in Toolliyo’s live editor.

Code

<!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="del">Delete invoice</button>
  <div id="mask" class="box hidden">
    <p>Delete invoice #441?</p>
    <button type="button" id="ok">Delete</button>
    <button type="button" id="cancel">Cancel</button>
  </div>
  <p id="out" class="muted"></p>
<script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
<script>
$(function () {
  function confirmQV() {
    var d = $.Deferred();
    $('#mask').removeClass('hidden');
    $('#ok').one('click', function () { $('#mask').addClass('hidden'); d.resolve(true); });
    $('#cancel').one('click', function () { $('#mask').addClass('hidden'); d.resolve(false); });
    return d.promise();
  }
  $('#del').on('click', function () {
    confirmQV().done(function (yes) {
      $('#out').text(yes ? 'Deleted (mock)' : 'Cancelled');
    });
  });
});
</script>
</body>
</html>

Result