[FSSDK-11925] fix type in event.experimentIds field in projectConfig

Author: raju-opti

lib/core/optimizely_config/index.ts

@@ -62,7 +62,6 @@ export class OptimizelyConfig {
   public events: OptimizelyEvent[];
   private datafile: string;
 
-
   constructor(configObj: ProjectConfig, datafile: string, logger?: LoggerFacade) {
     this.sdkKey = configObj.sdkKey ?? '';
     this.environmentKey = configObj.environmentKey ?? '';

lib/core/project_config/index.ts

@@ -50,6 +50,10 @@ interface Event {
   key: string;
   id: string;
   experimentsIds: string[];
+
+  // the field is named experimentIds in the datafile, but this type previously defined it as experimentsIds.
+  // keeping both to avoid breaking changes, removed experimentsIds in v6.
+  experimentIds: string[]; // fix typo in property name (https://github.com/optimizely/javascript-sdk/issues/991)
 }
 
 interface VariableUsageMap {
@@ -142,6 +146,12 @@ export const createProjectConfig = function(datafileObj?: JSON, datafileStr: str
 
   projectConfig.__datafileStr = datafileStr === null ? JSON.stringify(datafileObj) : datafileStr;
 
+  // Copy experimentIds to experimentsIds in each event to fix typo in property name
+  // https://github.com/optimizely/javascript-sdk/issues/991
+  projectConfig.events.forEach(event => {
+    event.experimentsIds = event.experimentIds;
+  });
+
   /*
    * Conditions of audiences in projectConfig.typedAudiences are not
    * expected to be string-encoded as they are here in projectConfig.audiences.

lib/shared_types.ts

@@ -1,5 +1,5 @@
 /**
- * Copyright 2020-2024, Optimizely
+ * Copyright 2020-2025, Optimizely
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -469,6 +469,10 @@ export type OptimizelyEvent = {
   id: string;
   key: string;
   experimentsIds: string[];
+
+  // the field is named experimentIds in the datafile, but this type previously defined it as experimentsIds.
+  // keeping both to avoid breaking changes, removed experimentsIds in v6.
+  experimentIds: string[]; // fix typo in property name (https://github.com/optimizely/javascript-sdk/issues/991)
 };
 
 export interface OptimizelyFeature {