scrolls half a page when pressing page up / down
// ==UserScript==
// @name Half page (up/down) scroll
// @namespace https://github.com/Alistair1231/my-userscripts/
// @version 0.2.0
// @description scrolls half a page when pressing page up / down
// @author Alistair1231
// @match *://*/*
// @license MIT
// ==/UserScript==
// https://greasyfork.org/en/scripts/444151-half-page-up-down-scroll/
// https://openuserjs.org/scripts/Alistair1231/Half_page_(updown)_scroll
(function () {
'use strict';
document.addEventListener('keydown', function (e) {
// page down
if (e.key === "PageDown") {
e.preventDefault();
window.scrollBy(0, window.innerHeight*.45);
console.log("page down");
}
// page up
else if (e.key === "PageUp") {
e.preventDefault();
window.scrollBy(0, -window.innerHeight*.45);
console.log("page up");
}
});
})();