From eea966a6ae3a2e900d9d1386c28b0056a8032296 Mon Sep 17 00:00:00 2001
From: Michael Shanks <mike@budibase.com>
Date: Tue, 9 Jun 2020 06:22:00 +0100
Subject: [PATCH] code review: add listner once

---
 .../userInterface/AppPreview/CurrentItemPreview.svelte     | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/packages/builder/src/components/userInterface/AppPreview/CurrentItemPreview.svelte b/packages/builder/src/components/userInterface/AppPreview/CurrentItemPreview.svelte
index 538e8c0769..53450c2200 100644
--- a/packages/builder/src/components/userInterface/AppPreview/CurrentItemPreview.svelte
+++ b/packages/builder/src/components/userInterface/AppPreview/CurrentItemPreview.svelte
@@ -110,11 +110,8 @@
       frontendDefinition,
     }))
   }
-  let iframeLoaded = false
-  $: if(iframe && !iframeLoaded) {
-    iframe.contentWindow.addEventListener("bb-ready", refreshContent)
-    iframeLoaded = true
-  }
+
+  $: if(iframe) iframe.contentWindow.addEventListener("bb-ready", refreshContent, { once: true })
 
   $: if(iframe && frontendDefinition) {
 		refreshContent()