From b051204af81d02b98bcd0b6b9b71ff70932edd0f Mon Sep 17 00:00:00 2001
From: Daniel Dyla <dyladan@users.noreply.github.com>
Date: Tue, 23 Mar 2021 14:55:51 -0400
Subject: [PATCH] chore: use a check the compiler does not recognize as always
 true

---
 .../opentelemetry-exporter-zipkin/src/platform/browser/util.ts  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/opentelemetry-exporter-zipkin/src/platform/browser/util.ts b/packages/opentelemetry-exporter-zipkin/src/platform/browser/util.ts
index 940f7439b9..f0409d982d 100644
--- a/packages/opentelemetry-exporter-zipkin/src/platform/browser/util.ts
+++ b/packages/opentelemetry-exporter-zipkin/src/platform/browser/util.ts
@@ -27,7 +27,7 @@ import * as zipkinTypes from '../../types';
  */
 export function prepareSend(urlStr: string, headers?: Record<string, string>) {
   let xhrHeaders: Record<string, string>;
-  const useBeacon = navigator.sendBeacon && !headers;
+  const useBeacon = typeof navigator.sendBeacon === 'function' && !headers;
   if (headers) {
     xhrHeaders = {
       Accept: 'application/json',