[Home](./index.md) > [@firebase/database](./database.md) > [EventType](./database.eventtype.md) ## EventType type One of the following strings: "value", "child\_added", "child\_changed", "child\_removed", or "child\_moved." Signature: ```typescript export declare type EventType = 'value' | 'child_added' | 'child_changed' | 'child_moved' | 'child_removed'; ```