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Half page (up/down) scroll

scrolls half a page when pressing page up / down

当前为 2023-06-04 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name         Half page (up/down) scroll
  3. // @namespace    https://github.com/Alistair1231/my-userscripts/
  4. // @version      0.2.0
  5. // @description  scrolls half a page when pressing page up / down
  6. // @author       Alistair1231
  7. // @match        *://*/*
  8. // @license      MIT
  9. // ==/UserScript==
  10. // https://greasyfork.org/en/scripts/444151-half-page-up-down-scroll/
  11. // https://openuserjs.org/scripts/Alistair1231/Half_page_(updown)_scroll
  12. (function () {
  13.     'use strict';
  14.  
  15.     document.addEventListener('keydown', function (e) {
  16.         // page down
  17.         if (e.key === "PageDown") {
  18.             e.preventDefault();
  19.             window.scrollBy(0, window.innerHeight*.45);
  20.             console.log("page down");
  21.         }
  22.         // page up
  23.         else if (e.key === "PageUp") {
  24.             e.preventDefault();
  25.             window.scrollBy(0, -window.innerHeight*.45);
  26.             console.log("page up");
  27.         }
  28.     });
  29.  
  30. })();