Hide quote button when its click. Cache its selector

boards/static/js/thread.js

@@ -27,6 +27,7 b" var REPLY_TO_MSG = '.reply-to-message';"
 var REPLY_TO_MSG_ID = '#reply-to-message-id';
 
 var $html = $("html, body");
+var $quoteButton = $("#quote-button");
 
 function moveCaretToEnd(el) {
     var newPos = el.val().length;
@@ -78,8 +79,7 b' function addQuickReply(postId) {'
 function addQuickQuote() {
     var textAreaJq = getPostTextarea();
 
-    var quoteButton = $("#quote-button");
-    var postId = quoteButton.attr('data-post-id');
+    var postId = $quoteButton.attr('data-post-id');
     if (postId != null) {
         addQuickReply(postId);
     }
@@ -87,7 +87,7 b' function addQuickQuote() {'
     var textToAdd = '';
     var selection = window.getSelection().toString();
     if (selection.length == 0) {
-        selection = quoteButton.attr('data-text');
+        selection = $quoteButton.attr('data-text');
     }
     if (selection.length > 0) {
         textToAdd += '[quote]' + selection + '[/quote]\n';
@@ -98,6 +98,8 b' function addQuickQuote() {'
     textAreaJq.focus();
 
     moveCaretToEnd(textAreaJq);
+
+    $quoteButton.hide();
 }
 
 function scrollToBottom() {
@@ -106,14 +108,13 b' function scrollToBottom() {'
 
 function showQuoteButton() {
     var selection = window.getSelection().getRangeAt(0).getBoundingClientRect();
-    var quoteButton = $("#quote-button");
     if (selection.width > 0) {
         // quoteButton.offset({ top: selection.top - selection.height, left: selection.left });
-        quoteButton.css({top: selection.top + $(window).scrollTop() - 30, left: selection.left});
-        quoteButton.show();
+        $quoteButton.css({top: selection.top + $(window).scrollTop() - 30, left: selection.left});
+        $quoteButton.show();
 
         var text = window.getSelection().toString();
-        quoteButton.attr('data-text', text);
+        $quoteButton.attr('data-text', text);
 
         var rect = window.getSelection().getRangeAt(0).getBoundingClientRect();
         var element = $(document.elementFromPoint(rect.x, rect.y));
@@ -126,9 +127,9 b' function showQuoteButton() {'
                 postId = postParent.attr('id');
             }
         }
-        quoteButton.attr('data-post-id', postId);
+        $quoteButton.attr('data-post-id', postId);
     } else {
-        quoteButton.hide();
+        $quoteButton.hide();
     }
 }