Source Code: (back to article)
<body>
<div>Start writing an email address in the following input. Refresh the page in the middle of your typing, and you'll see that the page remembers what you entered before.</div>
<br />
<input type="email" id="email"/>
</body>
<script>
window.onload = function() {
const email = sessionStorage.getItem('email');
if (email) {
alert('email found from session storage: ' + email);
document.getElementById('email').value = email;
}

document.getElementById('email').onkeyup = function() {
sessionStorage.setItem('email', this.value);
};
};
</script>