Version

In centralized environments, we can use linear version numbers to represent a version, such as incrementing a number each time or using timestamps. However, CRDTs can be used in decentralized environments, and their version representation is different.

In Loro, you can express a document’s version through a Version Vector or Frontiers.

const doc = new LoroDoc();
doc.version(); // State Version vector
doc.oplogVersion(); // OpLog Version vector
doc.frontiers(); // State Frontiers
doc.oplogFrontiers(); // OpLog Frontiers

In most cases, you might only need the Version Vector, which can be used for data synchronization and version comparison.

Learn More

• Version Vector - Complete peer state tracking for synchronization
• Frontiers - Compact version representation for checkpoints
• Version Deep Dive - Technical details about DAG, causality, and version implementations