Call initialization from context change if not initialized

Author: MattIPv4

packages/web/src/open-feature.ts

@@ -385,6 +385,14 @@ export class OpenFeatureAPI
     oldContext: EvaluationContext,
     newContext: EvaluationContext,
   ): Promise<void> {
+    // if the provider hasn't initialized yet, and isn't actively initializing, initialize instead of running context change handler
+    // the provider will be in this state if the user requested delayed initialization until the first context change
+    const initializationPromise = this.initializeProviderForDomain(wrapper, domain);
+    if (initializationPromise) {
+      await initializationPromise;
+      return;
+    }
+
     // this should always be set according to the typings, but let's be defensive considering JS
     const providerName = wrapper.provider?.metadata?.name || 'unnamed-provider';