check firebase precondition?

[wasita]

[wasita]

only seen in log for last user who actually triggers the state change

[wasita]

const db = firebase.firestore();

// Reference to the document you want to update
const docRef = db.collection('yourCollection').doc('yourDocumentId');

// Run a transaction on the document
db.runTransaction(transaction => {
  return transaction.get(docRef).then(doc => {
    if (!doc.exists) {
      throw "Document does not exist!";
    }

    // Perform your transactional operations here
    const newValue = doc.data().currentValue + 1;

    // Update the document
    transaction.update(docRef, { currentValue: newValue });

    // Return the new value (optional)
    return newValue;
  });
}).then(newUpdatedValue => {
  console.log("Transaction successfully committed!", newUpdatedValue);
}).catch(error => {
  console.error("Transaction failed: ", error);
});

try running transaction on specific document rather than entire db?