diff --git a/editor/extensions/ext-mathjax.js b/editor/extensions/ext-mathjax.js
index c914eb6a..94f0a4b9 100644
--- a/editor/extensions/ext-mathjax.js
+++ b/editor/extensions/ext-mathjax.js
@@ -15,28 +15,28 @@ svgEditor.addExtension('mathjax', function () {
   // Configuration of the MathJax extention.
 
   // This will be added to the head tag before MathJax is loaded.
-  const /* mathjaxConfiguration = '<script type="text/x-mathjax-config">\
-        MathJax.Hub.Config({\
-          extensions: ["tex2jax.js"],\
-          jax: ["input/TeX","output/SVG"],\
-          showProcessingMessages: true,\
-          showMathMenu: false,\
-          showMathMenuMSIE: false,\
-          errorSettings: {\
-            message: ["[Math Processing Error]"],\
-            style: {color: "#CC0000", "font-style":"italic"}\
-          },\
-          elements: [],\
-            tex2jax: {\
-            ignoreClass: "tex2jax_ignore2", processClass: "tex2jax_process2",\
-          },\
-          TeX: {\
-            extensions: ["AMSmath.js","AMSsymbols.js","noErrors.js","noUndefined.js"]\
-          },\
-          "SVG": {\
-          }\
-      });\
-      </script>', */
+  const /* mathjaxConfiguration = `<script type="text/x-mathjax-config">
+      MathJax.Hub.Config({
+        extensions: ['tex2jax.js'],
+        jax: ['input/TeX', 'output/SVG'],
+        showProcessingMessages: true,
+        showMathMenu: false,
+        showMathMenuMSIE: false,
+        errorSettings: {
+          message: ['[Math Processing Error]'],
+          style: {color: '#CC0000', 'font-style': 'italic'}
+        },
+        elements: [],
+          tex2jax: {
+          ignoreClass: 'tex2jax_ignore2', processClass: 'tex2jax_process2',
+        },
+        TeX: {
+          extensions: ['AMSmath.js', 'AMSsymbols.js', 'noErrors.js', 'noUndefined.js']
+        },
+        SVG: {
+        }
+    });
+    </script>`, */
     // mathjaxSrc = 'http://cdn.mathjax.org/mathjax/latest/MathJax.js',
     // Had been on https://c328740.ssl.cf1.rackcdn.com/mathjax/latest/MathJax.js?config=TeX-AMS-MML_SVG.js
     // Obtained Text-AMS-MML_SVG.js from https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.3/config/TeX-AMS-MML_SVG.js
diff --git a/editor/extensions/savefile.php b/editor/extensions/savefile.php
index 7029cf7d..5e367b30 100644
--- a/editor/extensions/savefile.php
+++ b/editor/extensions/savefile.php
@@ -4,7 +4,7 @@
   //   files to your server which may cause disk space or possibly security problems
   require('savefile_config.php');
   if (!isset($_POST['output_svg'])) {
-    print "You must supply output_svg";
+    print 'You must supply output_svg';
     exit;
   }
   $svg = $_POST['output_svg'];
diff --git a/editor/jgraduate/jpicker.js b/editor/jgraduate/jpicker.js
index 7cb2fa40..1117d843 100755
--- a/editor/jgraduate/jpicker.js
+++ b/editor/jgraduate/jpicker.js
@@ -785,7 +785,7 @@ const jPicker = function ($) {
         return { r: this.hexToInt(r), g: this.hexToInt(g), b: this.hexToInt(b), a: this.hexToInt(a) };
       },
       validateHex (hex) {
-        // if (typeof hex === "object") return "";
+        // if (typeof hex === 'object') return '';
         hex = hex.toLowerCase().replace(/[^a-f0-9]/g, '');
         if (hex.length > 8) hex = hex.substring(0, 8);
         return hex;
diff --git a/editor/jspdf/jspdf.plugin.svgToPdf.js b/editor/jspdf/jspdf.plugin.svgToPdf.js
index 1beb0296..803b600c 100644
--- a/editor/jspdf/jspdf.plugin.svgToPdf.js
+++ b/editor/jspdf/jspdf.plugin.svgToPdf.js
@@ -57,12 +57,12 @@ const removeAttributes = function (node, attributes) {
 
 const svgElementToPdf = function (element, pdf, options) {
   // pdf is a jsPDF object
-  // console.log("options =", options);
+  // console.log('options =', options);
   const remove = (options.removeInvalid === undefined ? false : options.removeInvalid);
   const k = (options.scale === undefined ? 1.0 : options.scale);
   let colorMode = null;
   [].forEach.call(element.children, function (node) {
-    // console.log("passing: ", node);
+    // console.log('passing: ', node);
     // let hasStrokeColor = false;
     let hasFillColor = false;
     let fillRGB;
@@ -192,7 +192,7 @@ const svgElementToPdf = function (element, pdf, options) {
         x = parseInt(node.getAttribute('x'), 10) - xOffset;
         y = parseInt(node.getAttribute('y'), 10);
       }
-      // console.log("fontSize:", pdfFontSize, "text:", node.textContent);
+      // console.log('fontSize:', pdfFontSize, 'text:', node.textContent);
       pdf.setFontSize(pdfFontSize).text(
         k * x,
         k * y,
diff --git a/editor/svg-editor.js b/editor/svg-editor.js
index e5b00f70..334f37bd 100644
--- a/editor/svg-editor.js
+++ b/editor/svg-editor.js
@@ -2145,8 +2145,8 @@ editor.init = function () {
         break;
 
       // TODO: Update values that change on move/resize, etc
-      // case "select":
-      // case "resize":
+      // case 'select':
+      // case 'resize':
       //   break;
       }
     }
@@ -5121,7 +5121,7 @@ editor.init = function () {
   updateCanvas(true);
   // });
 
-  //  const revnums = "svg-editor.js ($Rev$) ";
+  //  const revnums = 'svg-editor.js ($Rev$) ';
   //  revnums += svgCanvas.getVersion();
   //  $('#copyright')[0].setAttribute('title', revnums);
 
diff --git a/editor/svgutils.js b/editor/svgutils.js
index d6aab6e3..0d573582 100644
--- a/editor/svgutils.js
+++ b/editor/svgutils.js
@@ -295,7 +295,7 @@ export const walkTreePost = function (elem, cbFn) {
 */
 export const getUrlFromAttr = function (attrVal) {
   if (attrVal) {
-    // url("#somegrad")
+    // url('#somegrad')
     if (attrVal.startsWith('url("')) {
       return attrVal.substring(5, attrVal.indexOf('"', 6));
     }