Function flushBatch

apps/sim/instrumentation-client.ts:49–95

* Flush batch of events to server

()

   * Flush batch of events to server
   */
  function flushBatch(): void {
    if (eventBatch.length === 0) return

    const batch = eventBatch.splice(0, eventBatch.length)
    if (batchTimer) {
      clearTimeout(batchTimer)
      batchTimer = null
    }

    const sanitizedBatch = batch.map(sanitizeEventData)

    const payload = JSON.stringify({
      category: 'batch',
      action: 'client_events',
      events: sanitizedBatch,
      timestamp: Date.now(),
    })

    const payloadSize = new Blob([payload]).size
    const MAX_BEACON_SIZE = 64 * 1024 // 64KB

    if (navigator.sendBeacon && payloadSize < MAX_BEACON_SIZE) {
      const sent = navigator.sendBeacon('/api/telemetry', payload)

      if (!sent) {
        // boundary-raw-fetch: pre-bootstrap instrumentation
        fetch('/api/telemetry', {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: payload,
          keepalive: true,
        }).catch(() => {
          // Silently fail
        })
      }
    } else {
      // boundary-raw-fetch: pre-bootstrap instrumentation
      fetch('/api/telemetry', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: payload,
        keepalive: true,
      }).catch(() => {
        // Silently fail
      })
    }
  }

  window.addEventListener('beforeunload', flushBatch)
  window.addEventListener('visibilitychange', () => {