Realm JavaScript v2.26.0

Enhancements

• Add 4 new fields to NamedSubscription which reprents query-based subscriptions: createdAt, updatedAt, expiresAt and timeToLive. These make it possible to better reason about and control current subscriptions. (#2266)
• Add the option of updating the query controlled by a subscription using either Results.subscribe({name: 'name', update: true}) or the NamedSubscription.query property. (#2266)
• Add the option of setting a time-to-live for subscriptions using either Results.subscribe({name: 'name', timeToLive: <valueInMs>}) or the NamedSubscription.timeToLive property. (#2266)
• Add Realm.Results.description() which returns a string representation of the query.
• Add support for defining mapped properties in the schema using name: { type: 'int', mapTo: 'internalName' }. In that case the mapped name is used internally in the underlying Realm file, while the property key is used for reading/writing the property as well as querying it.
• Add RealmObject.addListener(), RealmObject.removeListener(), and RealmObject.removeAllListeners() to set up and remove object-level notifications. (#763)
• Add a new Realm.UpdateMode enum with the values: never, modified, all. This replaces the current
  Realm.create(type, properties, update) with Realm.create(type, properties, updateMode).
  Realm.create(type, properties, 'modified') is a new mode that only update existing properties that actually
  changed, while Realm.create(type, properties, 'never') is equal to Realm.create(type, properties, false) and
  Realm.create(type, properties, 'all') is equal to Realm.create(type, properties, true).
  Realm.create(type, properties, update) is now deprecated. (#2089)

Fixed

• Fixed retrying authentication requests. The issue could be observed as "Cannot read property 'get' of undefined." errors being thrown when the authenticate requests were retried. (#2297, since v2.24.0)
• Due to a rare race condition in some Android devices (including Samsung SM-T111), an app could crash hard. A workaround was introduced but never included in any releases. (#1895, since v2.11.0)

Compatibility

• Realm Object Server: 3.11.0 or later.
• APIs are backwards compatible with all previous release of realm in the 2.x.y series.
• File format: Generates Realms with format v9 (Reads and upgrades all previous formats)