Using forms in AMP

Before we start building forms, let's get the basics out of the way. The first thing to know is that whenever any form is used in an AMP page, then the amp-form extension script must also be included:

<script async custom-element="amp-form" src="https://cdn.ampproject.org/v0/amp-form-0.1.js"></script>

Submitting forms in AMP

Forms in AMP can be submitted as full page GET requests, or as XHR (or AJAX) GET or POST requests:

• If you use method="GET" in your form, you must then define a submission endpoint in either the action or action-xhr attribute
• If you use method="POST" then you must only use action-xhr for your submission endpoint
• Endpoints must...