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<!DOCTYPE html><html><head><meta charset="utf-8"></head><body>
<!-- Any copyright is dedicated to the Public Domain.
- http://creativecommons.org/publicdomain/zero/1.0/ -->
<!-- Form with a username-only field. -->
<form id="form-basic">
<input id="form-basic-username" type="text" name="username" autocomplete="username">
<input id="form-basic-submit" type="submit">
</form>
<script>
const form = document.getElementById( "form-basic" );
form.addEventListener( "submit", function onFormSubmit(event) {
event.preventDefault()
document.getElementById("form-basic").remove();
// Create the password-only form after the username-only form is submitted.
var form = document.createElement("form");
form.id = "form-basic";
var password = document.createElement("input");
password.id = "form-basic-password";
password.type = "password";
form.appendChild(password);
var submit = document.createElement("input");
submit.id = "form-basic-submit";
submit.type = "submit";
form.appendChild(submit);
document.body.appendChild(form);
});
</script>
</body></html>
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