From e3e3445b93c7706f2818478dda60316f09afaaf4 Mon Sep 17 00:00:00 2001
From: Peter Cai <peter@typeblog.net>
Date: Thu, 20 Feb 2020 10:35:18 +0800
Subject: [PATCH] pastebin: use more useCallback here to reduce re-rendering

---
 src/web/pastebin.coffee | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/web/pastebin.coffee b/src/web/pastebin.coffee
index 6a5db3e..b5ce279 100644
--- a/src/web/pastebin.coffee
+++ b/src/web/pastebin.coffee
@@ -17,9 +17,15 @@ export default Pastebin = ->
 
   onEditTextUpdate = (ev) ->
     setText ev.target.value
+  # onEditTextUpdate depends on absolutely nothing for reading
+  onEditTextUpdate = useCallback onEditTextUpdate, []
 
   paste = ->
+    # We force a single file name and mime type on web-pasted content
     doPaste "web_paste.txt", "text/plain", text
+  # Paste depends only on the actual text
+  # and of course the function doPaste
+  paste = useCallback paste, [text, doPaste]
 
   <div className="content-pastebin">
     {renderDialog()}