examples/amp-viewer-gpay-button.amp.html

<!doctype html>
<html ⚡>
<head>
  <meta charset="utf-8">
  <title>amp-viewer-gpay-button example</title>
  <link rel="canonical" href="amps.html">
  <meta name="viewport" content="width=device-width,minimum-scale=1,initial-scale=1">
  <style amp-boilerplate>body{-webkit-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-moz-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-ms-animation:-amp-start 8s steps(1,end) 0s 1 normal both;animation:-amp-start 8s steps(1,end) 0s 1 normal both}@-webkit-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-moz-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-ms-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-o-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}</style><noscript><style amp-boilerplate>body{-webkit-animation:none;-moz-animation:none;-ms-animation:none;animation:none}</style></noscript>
  <style amp-custom>
    amp-viewer-gpay-button {
      color: red;
    }
  </style>
  <script async custom-element="amp-viewer-gpay-button" src="https://cdn.ampproject.org/v0/amp-viewer-gpay-button-0.1.js"></script>
  <script async src="https://cdn.ampproject.org/v0.js"></script>
</head>
<body>
  <amp-viewer-gpay-button layout="responsive" width="150" height="80"></amp-viewer-gpay-button>
</body>
</html>