Add pixel-precision wheel scrolling capability using CTRL+SHIFT+Wheel for vertical scroll, and CTRL+ALT+Wheel for horizontal scroll, for any scrollable element which can be scrolled at pixel level.
// ==UserScript==
// @name Pixel-Precision Wheel Scroll
// @namespace https://greatest.deepsurf.us/en/users/85671-jcunews
// @version 1.0.3
// @license AGPL v3
// @author jcunews
// @description Add pixel-precision wheel scrolling capability using CTRL+SHIFT+Wheel for vertical scroll, and CTRL+ALT+Wheel for horizontal scroll, for any scrollable element which can be scrolled at pixel level.
// @match *://*/*
// @grant none
// @run-at document-start
// ==/UserScript==
addEventListener("wheel", (ev, ele) => {
if (ev.ctrlKey) {
ele = ev.target;
while (ele && (ele.offsetWidth === ele.scrollWidth) && (ele.offsetHeight === ele.scrollHeight)) ele = ele.parentNode;
ele = ele || window;
if (ev.shiftKey && !ev.altKey) {
ele.scrollBy(0, ev.deltaY > 0 ? 1 : -1);
ev.stopPropagation();
ev.preventDefault()
} else if (ev.altKey && !ev.shiftKey) {
ele.scrollBy(ev.deltaY > 0 ? 1 : -1, 0);;
ev.stopPropagation();
ev.preventDefault()
}
}
}, {capture: true, passive: false})