DataSnapshot

const snapshot = await db.ref('users/alice').get();

if (snapshot.exists()) {
  console.log(snapshot.val());
}

val(): any

const snapshot = await db.ref('users/alice').get();
const user = snapshot.val();
// { name: 'Alice', email: 'alice@example.com' }

exists(): boolean

const snapshot = await db.ref('users/bob').get();
if (!snapshot.exists()) {
  console.log('User not found');
}

hasChildren(): boolean

const snapshot = await db.ref('users/alice').get();
if (snapshot.hasChildren()) {
  console.log(`Has ${snapshot.numChildren()} children`);
}

hasChild(path: string): boolean

const snapshot = await db.ref('users/alice').get();
if (snapshot.hasChild('profile/avatar')) {
  console.log('User has an avatar');
}

numChildren(): number

const snapshot = await db.ref('users').get();
console.log(`Total users: ${snapshot.numChildren()}`);

child(path: string): DataSnapshot

const snapshot = await db.ref('users/alice').get();
const name = snapshot.child('name').val(); // 'Alice'

forEach(callback: (child: DataSnapshot) => boolean | void): void

const snapshot = await db.ref('users').get();
snapshot.forEach((childSnapshot) => {
  console.log(`${childSnapshot.key}: ${childSnapshot.val().name}`);
});

getPriority(): string | number | null

const snapshot = await db.ref('scores/alice').get();
const priority = snapshot.getPriority(); // e.g. 100

exportVal(): any

const snapshot = await db.ref('scores/alice').get();
const exported = snapshot.exportVal();
// { '.value': { score: 100 }, '.priority': 100 }

toJSON(): any

const snapshot = await db.ref('users/alice').get();
const json = JSON.stringify(snapshot); // uses toJSON() internally

isVolatile(): boolean

db.ref('cursors').on('value', (snapshot) => {
  if (snapshot.isVolatile()) {
    // High-frequency update — render immediately
    renderCursors(snapshot.val());
  }
});

getServerTimestamp(): number | null

db.ref('cursors').on('value', (snapshot) => {
  const ts = snapshot.getServerTimestamp();
  if (ts) {
    console.log(`Server time: ${new Date(ts).toISOString()}`);
  }
});