From 7cd52261e696f658b4ddc7495f5a630b8c17a29f Mon Sep 17 00:00:00 2001
From: tophf <tophf@gmx.com>
Date: Sat, 1 Aug 2020 18:31:29 +0300
Subject: [PATCH] use mousewheel to change focused "input[type=number], select"

---
 js/dom.js | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/js/dom.js b/js/dom.js
index 5b1d39b4..db9d9f0f 100644
--- a/js/dom.js
+++ b/js/dom.js
@@ -91,6 +91,21 @@ document.addEventListener('click', e => {
     e.preventDefault();
   }
 });
+// update inputs on mousewheel when focused
+document.addEventListener('wheel', event => {
+  const el = document.activeElement;
+  if (!el || el !== event.target && !el.contains(event.target)) {
+    return;
+  }
+  if (el.tagName === 'SELECT') {
+    el.selectedIndex = Math.max(0, Math.min(el.length - 1, el.selectedIndex + Math.sign(event.deltaY)));
+    event.preventDefault();
+  }
+  event.stopImmediatePropagation();
+}, {
+  capture: true,
+  passive: false,
+});
 
 function onDOMready() {
   if (document.readyState !== 'loading') {