permissions-policy-serial.html (261B)
1 <script> 2 'use strict'; 3 4 navigator.serial.getPorts().then(ports => { 5 window.parent.postMessage({ type: 'availability-result', enabled: true }, '*'); 6 }, error => { 7 window.parent.postMessage({ type: 'availability-result', enabled: false }, '*'); 8 }); 9 </script>