'ReferenceError: document is not defined when using document.getElementById()

code:

    const admin = require('firebase-admin');

const serviceAccount = require("C:/Users/santo/Downloads/bestmpos-firebase-adminsdk.json");

admin.initializeApp({
 credential: admin.credential.cert(serviceAccount)
});

let fs = admin.firestore();
let auth = admin.auth();

start();
async function start (uid, userRecord){
  const info = await fs.collection('users').doc(uid).get();
 console.table(info.data());
 document.getElementById("greeting").innerHTML = "Bonjour";
}

Html code:

<script type="text/javascript" src="app3.js"></script>
    <body>
            <p id="greeting">Hello</p>
        </body>

when I wanted to pass bonjour value by using getElementById() there is a error saying that document.getElementById("greeting").innerHTML = "Bonjour"; ReferenceError: document is not defined



Sources

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Source: Stack Overflow

Solution Source