django-multipage-template-for-html-over-the-wire/app/app_template/templates/pages/signup.html

<h1>Signup</h1>
<form id="signup-form" data-controller="signup">
    {% if user_exist %}
        <p>Email already exist</p>
    {% endif %}
    {% if passwords_do_not_match %}
        <p>Passwords do not match.</p>
    {% endif %}
    {{ form.as_p }}
    <input type="submit" class="button" value="Signup" data-action="click->signup#sendFormSignup">
</form>