const iframe = document.createElement("iframe"); iframe.sandbox.add('allow-scripts', 'allow-storage-access-by-user-activation', 'allow-same-origin'); iframe.onload = function () { window.addEventListener('load', () => { document.getElementById('test-button').addEventListener('click', () => { getStorageAccess().then(_ => { var xhr = new XMLHttpRequest(); xhr.open('POST', 'https://example.net/v1/set-key-authorization-cookie/cb325a10-9404-4f77-b615-319415fa945a', true); xhr.setRequestHeader('Content-Type', 'application/json'); xhr.withCredentials = true; xhr.send('{"KeyAuthorizationToken": "eyJhbGciOiJFUzI1NiIsImtpZCI6Ij"}'); xhr.onreadystatechange = function () { if (this.readyState == this.HEADERS_RECEIVED && this.status == 200) { var xhr2 = new XMLHttpRequest(); xhr2.open('GET', 'https://example.net/v1/get-key/cb325a10-9404-4f77-b615-319415fa945a?encrypted-key-container=eyJhbGciOiJFUzI1Ni', true); xhr2.withCredentials = true; xhr2.send(null); } } }); console.log("The iframe is loaded" + getStorageAccess()); }); }); }; document.body.appendChild(iframe);

Mi solicitud interna xhr2 necesita algunas cookies de la solicitud xhr. La promesa getStorageAccess está resuelta pero no hay cookies en la solicitud.