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firebase-tools

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<head> <style> div { font-family: sans-serif; } #popup { display: flex; flex-direction: column; justify-content: center; align-items: center; height: 100vh; width: 100vw; text-align: center; } #popup button { display: inline-flex; align-items: center; justify-content: center; border-radius: 0.375rem; font-size: 1.5rem; font-weight: 500; height: 2.5rem; padding: 0.5rem 1rem; background-color: black; color: white; outline: none; transition: background-color 150ms ease-in-out; margin-bottom: 20px; } #popup button:hover { background-color: #333; } #popup button:disabled { opacity: 0.5; pointer-events: none; } #message { height: 20px; margin-bottom: 20px; color: gray; font-size: 1.5rem; } </style> </head> <body> <div id="popup"> <button id="popupBtn" onclick="openPopup()">${buttonText}</button> <div id="message">(Close this window after authorizing the app)</div> </div> <script> function openPopup() { var w = window.open("${url}", "newwindow", "popup=1"); var m = document.getElementById("message"); var d = document.getElementById("popupBtn"); var timer = setInterval(function () { if (w.closed) { m.innerText = "You can close this page now"; d.disabled = true; clearInterval(timer); } }, 1000); } </script> </body>