"Firestore increment field" Code Answer's

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Firestore increment field

By SecretServiceBobSecretServiceBob on Jul 03, 2020
const userRef = db.collection('documents').doc('document_id');
const increment = firebase.firestore.FieldValue.increment(1);

userRef.update({ FieldToIncrease: increment });

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Firestore decrement field

By SecretServiceBobSecretServiceBob on Jul 03, 2020
const userRef = db.collection('documents').doc('document_id');
const decrement = firebase.firestore.FieldValue.increment(-1);

userRef.update({ fieldToDecrease: decrement });

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