diff --git a/web/assets/js/autoload.js b/web/assets/js/autoload.js
index a227378..2266cbb 100644
--- a/web/assets/js/autoload.js
+++ b/web/assets/js/autoload.js
@@ -88,15 +88,15 @@ function renderLineNumbers() {
 }
 
 // 1:1 skid from https://stackoverflow.com/questions/7404366/how-do-i-insert-some-text-where-the-cursor-is
-function insertTextAtCursor(el, text) {
-    var val = el.value, endIndex, range, doc = el.ownerDocument;
-    if (typeof el.selectionStart == "number"
-        && typeof el.selectionEnd == "number") {
-        endIndex = el.selectionEnd;
-        el.value = val.slice(0, endIndex) + text + val.slice(endIndex);
-        el.selectionStart = el.selectionEnd = endIndex + text.length;
+function insertTextAtCursor(element, text) {
+    let value = element.value, endIndex, range, doc = element.ownerDocument;
+    if (typeof element.selectionStart == "number"
+        && typeof element.selectionEnd == "number") {
+        endIndex = element.selectionEnd;
+        element.value = value.slice(0, endIndex) + text + value.slice(endIndex);
+        element.selectionStart = element.selectionEnd = endIndex + text.length;
     } else if (doc.selection != "undefined" && doc.selection.createRange) {
-        el.focus();
+        element.focus();
         range = doc.selection.createRange();
         range.collapse(false);
         range.text = text;
@@ -109,6 +109,5 @@ function getTextWidth(text, font) {
     let canvas = getTextWidth.canvas || (getTextWidth.canvas = document.createElement("canvas"));
     let context = canvas.getContext("2d");
     context.font = font;
-    let metrics = context.measureText(text);
-    return metrics.width;
+    return context.measureText(text).width;
 }
\ No newline at end of file