Queue calls while awaiting `load` when using the NPM package about analytics-next HOT 9 CLOSED

const [analytics] = AnalyticsBrowser.configure(...); // same options as `.load(...)`
await analytics.load();

import { Analytics, AnalyticsBrowser } from '@segment/analytics-next';
import { EventParams, PageParams, UserParams } from '@segment/analytics-next/dist/pkg/core/arguments-resolver';

type EnqueuedSegmentCall =
{
  type: 'track';
  args: EventParams;
} |
{
  type: 'page';
  args: PageParams;
} |
{
  type: 'identify';
  args: UserParams;
};

class Analytics {
  private analytics: Analytics | undefined;

  constructor() {
    this.load();
  }

  private async load() {
    const writeKey = process.env.REACT_APP_SEGMENT_WRITE_KEY;
    const cdnURL = process.env.REACT_APP_SEGMENT_CDN_PROXY;
    if (!writeKey) throw new Error('Segment Write Key Cannot Be Undefined');
    if (!cdnURL) throw new Error('Segment CDN URL Cannot Be Undefined');

    const [analytics] = await AnalyticsBrowser.load({ writeKey, cdnURL });
    this.analytics = analytics;

    this.flushQueue();
  }

  private enqueuedCalls: EnqueuedSegmentCall[] = [];

  private flushQueue() {
    this.enqueuedCalls.forEach((call) => {
      switch (call.type) {
        case 'track':
          return this.track(...call.args);
        case 'page':
          return this.page(...call.args);
        case 'identify':
          return this.identify(...call.args);
      }
    });
    this.enqueuedCalls = [];
  }

  track(...args: EventParams) {
    if (!this.analytics) {
      this.enqueuedCalls.push({ type: 'track', args: args });
      return;
    }
    this.analytics.track(...args);
  }

  page(...args: PageParams) {
    if (!this.analytics) {
      this.enqueuedCalls.push({ type: 'page', args: args });
      return;
    }
    this.analytics?.page(...args);
  }

  identify(...args: UserParams) {
    if (!this.analytics) {
      this.enqueuedCalls.push({ type: 'identify', args: args });
      return;
    }
    this.analytics?.identify(...args);
  }
}

export default new Analytics();

import analytics from '@analytics/analytics';

analytics.track(...);
analytics.page(...);
analytics.identify(...);