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Transaction.update() method

Updates fields in the document referred to by the provided DocumentReference. The update will fail if applied to a document that does not exist.

Signature:

update(documentRef: DocumentReference<unknown>, data: UpdateData): this;

Parameters

Parameter	Type	Description
documentRef	DocumentReference<unknown>	A reference to the document to be updated.
data	UpdateData	An object containing the fields and values with which to update the document. Fields can contain dots to reference nested fields within the document.

Returns:

this

This Transaction instance. Used for chaining method calls.