AMP

Thank you!

  • websites

User Consent Modal UI

Introduction

Sometimes publishers want to display more disclosures in the initial consent prompt iframe. This sample demonstrates how you can use amp-consent together with a third-party iframe and style it to appear like a modal.

Setup

We need to import the amp-consent component.

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

We define a basic consent flow using the promptUISrc to load our custom consent iframe.

<amp-consent id="myUserConsent" layout="nodisplay">
  <script type="application/json">{
    "consentInstanceId": "myConsent",
    "consentRequired": true,
    "promptUISrc": "/static/samples/files/diy-consent.html",
    "postPromptUI": "post-consent-ui"
  }</script>
  <div id="post-consent-ui">
    <button on="tap:myUserConsent.prompt()">Update Consent</button>
  </div>
</amp-consent>

When the consent dialog iframe is ready, it can send the amp-consent component a postMessage with the style information.

window.parent.postMessage({
  type: 'consent-ui',
  action: 'ready',
  initialHeight: '80vh',
  enableBorder: true
}, '*');

Here, the initialHeight is a string that represents the viewport height that the iframe should take. A viewport height between 30 and 60, inclusive, will tell amp-consent to style the iframe in a bottom sheet. A viewport height greater than 60 and less than or equal to 80 will tell amp-consent to style the iframe as a centered modal.

Use data-block-on-consent attribute to block AMP components until consent is given. Individual AMP components can override blocking behavior and implement blocking logic themselves.

Here is an image which is blocked until consent is given:

<amp-img data-block-on-consent src="/static/samples/img/landscape_lake_300x201.jpg" width="300" height="201">
</amp-img>
Need further explanation?

If the explanations on this page don't cover all of your questions feel free to reach out to other AMP users to discuss your exact use case.

Go to Stack Overflow
An unexplained feature?

The AMP project strongly encourages your participation and contributions! We hope you'll become an ongoing participant in our open source community but we also welcome one-off contributions for the issues you're particularly passionate about.

Edit sample on GitHub