I'm working on the front end for a project to display a graph of data collected from sensors. I'm following Net Ninja's youtube series on connecting to firebase, as well as trying many other approaches found online, but nothing I try works. I cannot get data from my firebase test database to display, and also can't display example data from others. I was hoping for a bit of help in what I could have missed.
My index.html is as follows:
<html>
<head>
<script src="https://www.gstatic.com/firebasejs/5.0.3/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/5.0.3/firebase-firestore.js"></script>
<script src="https://www.gstatic.com/firebasejs/5.0.3/firebase-database.js"></script>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<h1>test</h1>
<div class="content">
<form id="add-data-form"></form>
<ul id="data-list"></ul>
</div>
<!-- The core Firebase JS SDK is always required and must be listed first -->
<script src="https://www.gstatic.com/firebasejs/7.9.1/firebase-app.js"></script>
<!-- TODO: Add SDKs for Firebase products that you want to use
https://firebase.google.com/docs/web/setup#available-libraries -->
<script src="https://www.gstatic.com/firebasejs/7.9.1/firebase-analytics.js"></script>
<script src="https://www.gstatic.com/firebasejs/7.9.1/firebase-database.js"></script>
<script>
// Your web app's Firebase configuration
var firebaseConfig = {
**FIREBASE DATA**
};
// Initialize Firebase
firebase.initializeApp(firebaseConfig);
const db = firebase.firestore();
firebase.analytics();
</script>
<script src="app.js"></script>
</body>
</html>
And my app.js is as follows:
const dataList = document.querySelector('#data-list');
// create element & render data
function renderData(doc){
let li = document.createElement('li');
let time = document.createElement('span');
let data = document.createElement('span');
li.setAttribute('data-id', doc.id);
time.textContent = doc.data().time;
data.textContent = doc.data().data;
li.appendChild(time);
li.appendChild(data);
dataList.appendChild(li);
}
// getting data
db.collection('sensorData').get().then(snapshot => {
snapshot.docs.forEach(doc => {
renderData(doc);
});
});
When I launch the index, I only see the "test" heading, no data from the firebase. I have used powershell to initialise the database, that didn't make a difference though. Any help would be greatly appreciated, thank you