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Half page (up/down) scroll

scrolls half a page when pressing page up / down

目前为 2022-04-28 提交的版本。查看 最新版本。

  1. // ==UserScript==
  2. // @name         Half page (up/down) scroll
  3. // @namespace    https://greasyfork.org/en/users/12725-alistair1231
  4. // @version      0.1
  5. // @description  scrolls half a page when pressing page up / down
  6. // @author       Alistair1231
  7. // @match        htt*://*/*
  8. // @grant        unsafeWindow
  9. // @require      https://code.jquery.com/jquery-3.3.1.min.js
  10. // @license GPL-3.0
  11. // ==/UserScript==
  12.  
  13. (function () {
  14.     'use strict';
  15.  
  16.     jQuery(unsafeWindow).on('keydown', function (e) {
  17.         // page down
  18.         if (e.keyCode === 34) {
  19.             e.preventDefault();
  20.             unsafeWindow.scrollBy(0, unsafeWindow.innerHeight / 2)
  21.             console.log("page down")
  22.         }
  23.         // page up
  24.         else if (e.keyCode === 33) {
  25.             e.preventDefault();
  26.             unsafeWindow.scrollBy(0, -unsafeWindow.innerHeight / 2)
  27.             console.log("page up")
  28.         }
  29.  
  30.     });
  31.  
  32. })();