From 5d8fb2f79191f535241c015dff4b7bb7e1e37f43 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=A6=86=E6=9C=A8?=
 <43062104+yumusb@users.noreply.github.com>
Date: Fri, 21 Apr 2023 12:04:30 +0800
Subject: [PATCH] Update index.js

Do not send the x-umami-cache request header when the cache is not defined (the first request sent to the umami server when the visitor opens the page)
---
 tracker/index.js | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/tracker/index.js b/tracker/index.js
index 4d680c7e..7c727326 100644
--- a/tracker/index.js
+++ b/tracker/index.js
@@ -162,11 +162,16 @@
 
   const send = payload => {
     if (trackingDisabled()) return;
-
+    const headers = {
+      'Content-Type': 'application/json'
+    };
+    if (typeof cache !== 'undefined') {
+      headers['x-umami-cache'] = cache;
+    }
     return fetch(endpoint, {
       method: 'POST',
       body: JSON.stringify({ type: 'event', payload }),
-      headers: { 'Content-Type': 'application/json', ['x-umami-cache']: cache },
+      headers: headers
     })
       .then(res => res.text())
       .then(text => (cache = text));