avoid an exception

2019-12-11 22:34:16 +00:00 · 2019-12-11 22:34:16 +00:00 · 26116d313a
parent 738f177d6c
commit 26116d313a
1 changed files with 6 additions and 0 deletions
--- a/webui/src/main/js/certificates.js
+++ b/webui/src/main/js/certificates.js
@ -113,6 +113,12 @@ class CertificateFetch {
 		var fetch = this
 		var block = document.getElementById("certificates-" + this.divId)
 		
+		if (block == null) {
+			// can happen if the user clicks away without hiding first
+			certificateFetches.delete(this.divId)
+			return
+		}
+		
 		var xmlhttp = new XMLHttpRequest()
 		xmlhttp.onreadystatechange = function() {
 			if (this.readyState == 4 && this.status == 200) {