diff --git a/autofill/autoprompt/case-1.html b/autofill/autoprompt/case-1.html
new file mode 100644
index 0000000..8a9fc3e
--- /dev/null
+++ b/autofill/autoprompt/case-1.html
@@ -0,0 +1,54 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width">
+  <title>Autofill autoprompt for signin forms</title>
+  <link rel="stylesheet" href="../style.css" />
+</head>
+
+<body>
+<p><a href="../index.html">[Home]</a></p>
+<nav>
+  <ul class="nav">
+    <li><a href="./case-1.html">Case 1</a></li>
+    <li><a href="./case-2.html">Case 2</a></li>
+    <li><a href="./case-3.html">Case 3</a></li>
+    <li><a href="./case-4.html">Case 4</a></li>
+    <li><a href="./case-5.html">Case 5</a></li>
+  </ul>
+</nav>
+
+<p id="demo"></p>
+
+<div class="">
+  <p>Sign in form present on pageload (<b>should prompt automatically</b>).</p>
+
+  <div class="dialog">
+    <form id="click-form" novalidate>
+      <h3>Sign in form</h3>
+      <fieldset>
+        <label for="email">Email</label>
+        <input id="email" type="email">
+        <label for="password">Password</label>
+        <input id="password" type="password">
+        <button type="submit">Sign in</button>
+      </fieldset>
+    </form>
+  </div>
+  <script>
+    const clickForm = document.getElementById('click-form');
+    const button = clickForm?.querySelector('button');
+    const handler = (e) => {
+      e.preventDefault();
+      e.stopImmediatePropagation();
+      clickForm.outerHTML = '<h1>Submitted!</h1>';
+    }
+    button?.addEventListener('click', handler, true);
+  </script>
+</div>
+
+</body>
+
+</html>
diff --git a/autofill/autoprompt/case-2.html b/autofill/autoprompt/case-2.html
new file mode 100644
index 0000000..98e24d0
--- /dev/null
+++ b/autofill/autoprompt/case-2.html
@@ -0,0 +1,59 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width">
+  <title>Autofill autoprompt for signin forms</title>
+  <link rel="stylesheet" href="../style.css" />
+</head>
+
+<body>
+<p><a href="../index.html">[Home]</a></p>
+<nav>
+  <ul class="nav">
+    <li><a href="./case-1.html">Case 1</a></li>
+    <li><a href="./case-2.html">Case 2</a></li>
+    <li><a href="./case-3.html">Case 3</a></li>
+    <li><a href="./case-4.html">Case 4</a></li>
+    <li><a href="./case-5.html">Case 5</a></li>
+  </ul>
+</nav>
+
+<p id="demo"></p>
+
+<div class="">
+  <p>Form created in modal after click (<b>should not prompt automatically</b>).</p>
+
+  <div class="dialog">
+    <p><button type="button">Click here to login</button></p>
+  </div>
+  <script>
+    const initialButton = document.querySelector('button');
+    initialButton.addEventListener('click', () => {
+      const formEl = `<form id="click-form" novalidate action="./case-3.html">
+      <h3>Sign in form dia</h3>
+      <fieldset>
+        <label for="email">Email</label>
+        <input id="email" type="email">
+        <label for="password">Password</label>
+        <input id="password" type="password">
+        <button type="submit">Sign in</button>
+      </fieldset>
+    </form>`
+      initialButton.outerHTML = formEl;
+      const clickForm = document.getElementById('click-form');
+      const button = clickForm?.querySelector('button');
+      const handler = (e) => {
+        e.preventDefault();
+        e.stopImmediatePropagation();
+        window.location.href = './case-3.html'
+      }
+      button?.addEventListener('click', handler, true);
+    })
+  </script>
+</div>
+
+</body>
+
+</html>
diff --git a/autofill/autoprompt/case-3.html b/autofill/autoprompt/case-3.html
new file mode 100644
index 0000000..8c0c1c1
--- /dev/null
+++ b/autofill/autoprompt/case-3.html
@@ -0,0 +1,67 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width">
+  <title>Autofill autoprompt for signin forms</title>
+  <link rel="stylesheet" href="../style.css" />
+</head>
+
+<body>
+<p><a href="../index.html">[Home]</a></p>
+<nav>
+  <ul class="nav">
+    <li><a href="./case-1.html">Case 1</a></li>
+    <li><a href="./case-2.html">Case 2</a></li>
+    <li><a href="./case-3.html">Case 3</a></li>
+    <li><a href="./case-4.html">Case 4</a></li>
+    <li><a href="./case-5.html">Case 5</a></li>
+  </ul>
+</nav>
+
+<p id="demo"></p>
+
+<div class="dialog">
+  <p>Login form with a multistep flow. It should prompt automatically on first load, then the second field triggers the prompt on tap/click.</p>
+  <form action="/login" id="login">
+    <h2>Log in</h2>
+    <fieldset>
+      <label for="email">Email</label>
+      <input id="email" type="email" required>
+      <button type="button">Continue</button>
+    </fieldset>
+    <fieldset class="password-container" hidden>
+      <label for="password">Password</label>
+      <input id="password" type="password" required>
+      <button type="submit">Log in</button>
+    </fieldset>
+  </form>
+</div>
+
+<script type="module">
+  const continueButton = document.querySelector('button[type=button]');
+  const submitButton = document.querySelector('button[type=submit]');
+  const passwordContainer = document.querySelector('.password-container');
+
+  continueButton.addEventListener('click', () => {
+      if (form.email.validity.valid) {
+          passwordContainer.removeAttribute('hidden');
+          continueButton.setAttribute('hidden', '');
+      }
+  });
+
+  const form = document.forms.login;
+  form.addEventListener('submit', (e) => {
+      e.preventDefault();
+      if (form.checkValidity()) {
+          setTimeout(() => {
+              form.outerHTML = '<h1>Submitted!</h1>';
+          }, 100);
+      }
+  });
+</script>
+
+</body>
+
+</html>
diff --git a/autofill/autoprompt/case-4.html b/autofill/autoprompt/case-4.html
new file mode 100644
index 0000000..6765f0b
--- /dev/null
+++ b/autofill/autoprompt/case-4.html
@@ -0,0 +1,65 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width">
+  <title>Autofill autoprompt for signin forms</title>
+  <link rel="stylesheet" href="../style.css" />
+</head>
+
+<body>
+<p><a href="../index.html">[Home]</a></p>
+<nav>
+  <ul class="nav">
+    <li><a href="./case-1.html">Case 1</a></li>
+    <li><a href="./case-2.html">Case 2</a></li>
+    <li><a href="./case-3.html">Case 3</a></li>
+    <li><a href="./case-4.html">Case 4</a></li>
+    <li><a href="./case-5.html">Case 5</a></li>
+  </ul>
+</nav>
+
+<p id="demo">The cookie dialog will prevent autoprompt. You should not see an autoprompt on this page. Once dismissing the cookie dialog, you can use the form as usual.</p>
+
+<div class="dialog">
+  <form action="/login" id="login">
+    <h2>Log in</h2>
+    <fieldset>
+      <label for="email">Email</label>
+      <input id="email" type="email">
+      <label for="password">Password</label>
+      <input id="password" type="password">
+      <button type="submit">Log in</button>
+    </fieldset>
+  </form>
+</div>
+
+<div class="dialog dialog--cookie-dialog" hidden>
+  <h2>Annoying cookie prompt</h2>
+  <h3>This cookie prompt will appear with a slight delay after page load. It will cover our beloved login form thus preventing autoprompt.</h3>
+  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.  Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. </p>
+  <p><button type="button" class="close-cookie-dialog">Accept all cookies, you have no choice</button></p>
+</div>
+<script type="module">
+  const cookieDialog = document.querySelector('.dialog--cookie-dialog');
+  const closeCookieDialogBtn = document.querySelector('.close-cookie-dialog');
+  closeCookieDialogBtn.addEventListener('click', () => cookieDialog.setAttribute('hidden', ''));
+
+  // show the cookie prompt after page load
+  setTimeout(() => cookieDialog.removeAttribute('hidden'), 100);
+
+  const form = document.forms.login;
+  form.addEventListener('submit', (e) => {
+      e.preventDefault();
+      if (form.checkValidity()) {
+          setTimeout(() => {
+              form.outerHTML = '<h1>Submitted!</h1>';
+          }, 100);
+      }
+  });
+</script>
+
+</body>
+
+</html>
diff --git a/autofill/autoprompt/case-5.html b/autofill/autoprompt/case-5.html
new file mode 100644
index 0000000..816aa09
--- /dev/null
+++ b/autofill/autoprompt/case-5.html
@@ -0,0 +1,62 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width">
+  <title>Autofill autoprompt for signin forms</title>
+  <link rel="stylesheet" href="../style.css" />
+</head>
+
+<body>
+<p><a href="../index.html">[Home]</a></p>
+<nav>
+  <ul class="nav">
+    <li><a href="./case-1.html">Case 1</a></li>
+    <li><a href="./case-2.html">Case 2</a></li>
+    <li><a href="./case-3.html">Case 3</a></li>
+    <li><a href="./case-4.html">Case 4</a></li>
+    <li><a href="./case-5.html">Case 5</a></li>
+  </ul>
+</nav>
+
+<p id="demo"></p>
+<p>Sign in form present below the fold on mobile, but in a sidebar on larger screens (<strong>should prompt automatically only when visible, i.e. on desktop</strong>).</p>
+
+<div class="container">
+  <div class="main">
+    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.  Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. </p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.  Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. </p>
+
+    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.  Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. </p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.  Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. </p>
+  </div>
+
+  <div class="sidebar">
+    <form id="click-form" novalidate>
+      <h3>Sign in form</h3>
+      <fieldset>
+        <label for="email">Email</label>
+        <input id="email" type="email">
+        <label for="password">Password</label>
+        <input id="password" type="password">
+        <button type="submit">Sign in</button>
+      </fieldset>
+    </form>
+  </div>
+
+  <script>
+    const clickForm = document.getElementById('click-form');
+    const button = clickForm?.querySelector('button');
+    const handler = (e) => {
+      e.preventDefault();
+      e.stopImmediatePropagation();
+      clickForm.outerHTML = '<h1>Submitted!</h1>';
+    }
+    button?.addEventListener('click', handler, true);
+  </script>
+</div>
+
+</body>
+
+</html>
diff --git a/autofill/style.css b/autofill/style.css
index bdb18b4..19d7f92 100644
--- a/autofill/style.css
+++ b/autofill/style.css
@@ -1,33 +1,64 @@
+* {
+  box-sizing: border-box;
+}
+
 body {
   font-family: "Lucida Sans", "Lucida Sans Regular", "Lucida Grande",
     "Lucida Sans Unicode", Geneva, Verdana, sans-serif;
   padding: 1em;
+  line-height: 1.45;
+}
+
+.nav {
+  display: flex;
+  flex-direction: row;
+  overflow-x: auto;
+  padding: 0;
+}
+
+.nav > li {
+  margin: 1rem 1.3rem;
+  white-space: nowrap;
 }
 
 .dialog {
-  position: fixed;
-  left: 50%;
-  top: 100px;
-  width: 350px;
+  width: 400px;
+  max-width: 100%;
   height: auto;
   padding: 30px;
   background-color: #fefefe;
   border-radius: 4px;
   border: 0.5px solid #999;
   box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
-  transform: translateX(-50%);
   text-align: center;
 }
 
+.dialog--cookie-dialog {
+  position: fixed;
+  top: 1em;
+  left: 1em;
+}
+
+@media screen and (min-width: 610px) {
+  .container {
+    display: grid;
+    grid-template-columns: 1fr minmax(200px, 1fr);
+    grid-gap: 40px;
+    width: 700px;
+    max-width: 100%;
+    margin: 0 auto;
+  }
+}
+
 hr {
   margin: 2em auto;
 }
 
 fieldset {
   display: grid;
-  grid-template-columns: max-content 1fr;
+  grid-template-columns: max-content minmax(80px, 1fr);
   grid-gap: 1em;
-  max-width: 410px;
+  max-width: 100%;
   padding: 0;
   border: none;
 }
@@ -37,6 +68,11 @@ label {
   text-align: right;
 }
 
+input {
+  width: auto;
+  max-width: 100%;
+}
+
 input,
 button,
 .button {
@@ -60,6 +96,10 @@ button,
   box-shadow: none;
 }
 
+*[hidden] {
+  display: none;
+}
+
 .button-with-child {
   position: relative;
   width: 250px;
diff --git a/index.html b/index.html
index cfe56b1..7ee24f6 100644
--- a/index.html
+++ b/index.html
@@ -75,6 +75,16 @@ <h2>Autofill</h2>
 	<li><a href="./autofill/modal.html">Email autofill form within self-closing modal</a></li>
 	<li><a href="./autofill/form-submission.html">Form submission detection and autofill</a></li>
 	<li><a href="./autofill/frame-form-submission-parent.html">Form submission detection and autofill within an iframe</a></li>
+  <li>
+		Autoprompt
+		<ul>
+			<li><a href="./autofill/autoprompt/case-1.html">Case 1</a></li>
+			<li><a href="./autofill/autoprompt/case-2.html">Case 2</a></li>
+			<li><a href="./autofill/autoprompt/case-3.html">Case 3</a></li>
+			<li><a href="./autofill/autoprompt/case-4.html">Case 4</a></li>
+			<li><a href="./autofill/autoprompt/case-5.html">Case 5</a></li>
+		</ul>
+	</li>
 </ul>
 
 <h2>Other</h2>
