Use single quotes

2 files changed, 3 insertions, 3 deletions

diff --git a/ext/fg/js/popup.js b/ext/fg/js/popup.js
index ac96f9e8..df784029 100644
--- a/ext/fg/js/popup.js
+++ b/ext/fg/js/popup.js
@@ -401,7 +401,7 @@ class Popup {
         if (Popup.outerStylesheet === null) {
             if (!css) { return; }
             Popup.outerStylesheet = document.createElement('style');
-            Popup.outerStylesheet.id = "yomichan-popup-outer-stylesheet";
+            Popup.outerStylesheet.id = 'yomichan-popup-outer-stylesheet';
         }
 
         const outerStylesheet = Popup.outerStylesheet;
diff --git a/ext/fg/js/source.js b/ext/fg/js/source.js
index 5be521fa..886093d7 100644
--- a/ext/fg/js/source.js
+++ b/ext/fg/js/source.js
@@ -99,9 +99,9 @@ class TextSourceRange {
 
     static getRubyElement(node) {
         node = TextSourceRange.getParentElement(node);
-        if (node !== null && node.nodeName.toUpperCase() === "RT") {
+        if (node !== null && node.nodeName.toUpperCase() === 'RT') {
             node = node.parentNode;
-            return (node !== null && node.nodeName.toUpperCase() === "RUBY") ? node : null;
+            return (node !== null && node.nodeName.toUpperCase() === 'RUBY') ? node : null;
         }
         return null;
     }