fix: default current presences to empty array

w3b6x9 · w3b6x9 · commit d2b65dc02fa5 · 2022-08-06T16:43:27.000-04:00
diff --git a/packages/core/realtime-js/src/RealtimePresence.ts b/packages/core/realtime-js/src/RealtimePresence.ts
@@ -196,10 +196,10 @@ export default class RealtimePresence {
     }
 
     this.map(joins, (key, newPresences: Presence[]) => {
-      const currentPresences: Presence[] = state[key]
+      const currentPresences: Presence[] = state[key] ?? []
       state[key] = this.cloneDeep(newPresences)
 
-      if (currentPresences) {
+      if (currentPresences.length > 0) {
         const joinedPresenceRefs = state[key].map(
           (m: Presence) => m.presence_ref
         )

Original file line number	Diff line number	Diff line change
`@@ -196,10 +196,10 @@ export default class RealtimePresence {`
`196`	`196`	`}`
`197`	`197`
`198`	`198`	`this.map(joins, (key, newPresences: Presence[]) => {`
`199`		`- const currentPresences: Presence[] = state[key]`
	`199`	`+ const currentPresences: Presence[] = state[key] ?? []`
`200`	`200`	`state[key] = this.cloneDeep(newPresences)`
`201`	`201`
`202`		`- if (currentPresences) {`
	`202`	`+ if (currentPresences.length > 0) {`
`203`	`203`	`const joinedPresenceRefs = state[key].map(`
`204`	`204`	`(m: Presence) => m.presence_ref`
`205`	`205`	`)`