diff --git a/edit/header-resizer.js b/edit/header-resizer.js
index 8cec6d63..910caf80 100644
--- a/edit/header-resizer.js
+++ b/edit/header-resizer.js
@@ -6,6 +6,7 @@
 (function HeaderResizer() {
   const el = $('#header-resizer');
   let lastW, lastX;
+
   el.onmousedown = e => {
     if (e.button) return;
     lastW = $('#header').clientWidth;
@@ -14,18 +15,19 @@
     document.on('mousemove', resize);
     document.on('mouseup', resizeStop);
   };
+
   function resize({clientX: x}) {
     const w = editor.updateHeaderWidth(lastW + x - lastX);
     const delta = w - lastW;
-    if (delta) {
-      lastW = w;
-      lastX = x;
-      prefs.set('editor.headerWidth', w);
-      for (const el of $$('.CodeMirror-linewidget[style*="width:"]')) {
-        el.style.width = parseFloat(el.style.width) - delta + 'px';
-      }
+    if (!delta) return;
+    lastW = w;
+    lastX = x;
+    prefs.set('editor.headerWidth', w);
+    for (const el of $$('.CodeMirror-linewidget[style*="width:"]')) {
+      el.style.width = parseFloat(el.style.width) - delta + 'px';
     }
   }
+
   function resizeStop() {
     document.off('mouseup', resizeStop);
     document.off('mousemove', resize);