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<!DOCTYPE html><!-- xlsx.js (C) 2013-present  SheetJS http://sheetjs.com --><!-- vim: set ts=2: --><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>SheetJS Firebase Dump Demo</title><style>a { text-decoration: none }</style></head><body><pre><h3><a href="//sheetjs.com/">SheetJS</a> Firebase Dump Demo</h3><b>Example Code</b>
  /* ... connect to firebase */  const database = firebase.database();
  /* import workbook */  await database.ref('foo').set(workbook);
  /* change cells */  database.ref('foo').update({    "Sheets/Sheet1/A1": {"t": "s", "v": "J"},    "Sheets/Sheet1/A2": {"t": "n", "v": 5},  });
  /* export snapshot */  const val = await database.ref('foo').once('value').val();  XLSX.writeFile(wb, "firebase.xlsx");
</pre><script src="xlsx.full.min.js"></script><script src="https://www.gstatic.com/firebasejs/4.12.0/firebase.js"></script><script>const Firebase = firebase;const config = {  credential: {    getAccessToken: () => ({      expires_in: 0,      access_token: '',    }),  },  databaseURL: 'ws://localhost:5555'};
/* make new workbook object from CSV */const wb = XLSX.read('a,b,c\n1,2,3', {type:"binary"});
let P = Promise.resolve("sheetjs");
/* Connect to Firebase server and initialize collection */P = P.then(async () => {  Firebase.initializeApp(config);  const database = Firebase.database();  await database.ref('foo').set(null);  return [database];});
/* Insert entire workbook object into `foo` ref */P = P.then(async ([database]) => {  await database.ref('foo').set(wb);  return [database];});
/* Change cell A1 of Sheet1 to "J" and change A2 to 5 */P = P.then(async ([database]) => {  database.ref('foo').update({    "Sheets/Sheet1/A1": {"t": "s", "v": "J"},    "Sheets/Sheet1/A2": {"t": "n", "v": 5},  });  return [database];});
/* Write to file */P = P.then(async ([database]) => {  const val = await database.ref('foo').once('value');  const wb = await val.val();  XLSX.writeFile(wb, "firebase.xlsx");  console.log(csv);  return [database];});
/* Close connection */P = P.then(async ([database]) => { database.app.delete(); });
</script></body>