☰

Scroll to empty text box

Press F2 to scroll to an empty text box and focus it

目前为 2018-10-14 提交的版本。查看 最新版本。

  1. // ==UserScript==
  2. // @name         Scroll to empty text box
  3. // @namespace    http://tampermonkey.net/
  4. // @version      0.2.0
  5. // @description  Press F2 to scroll to an empty text box and focus it
  6. // @author       Valacar
  7. // @match        *://*/*
  8. // @grant        none
  9. // ==/UserScript==
  10.  
  11. (function() {
  12.   "use strict";
  13.  
  14.   // custom key. note: anything besides function keys may not work.
  15.   // key code list: https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/code#Code_values
  16.   const config = {
  17.     key: "F2"
  18.   };
  19.  
  20.   function findEmptyInput() {
  21.     const inputs =
  22.           document.querySelectorAll('textarea:not([readonly]),input[type="text"]:not([readonly])');
  23.     for (let input of inputs) {
  24.       if (input.value === "") {
  25.         return input;
  26.       }
  27.     }
  28.   }
  29.  
  30.   addEventListener("keydown", e => {
  31.     if (e.defaultPrevented) {
  32.       return;
  33.     }
  34.     if (e.code === config.key) {
  35.       const emptyInput = findEmptyInput();
  36.       if (emptyInput) {
  37.         //console.debug(emptyInput);
  38.         emptyInput.scrollIntoView({
  39.           behavior: "smooth",
  40.           block: "center",
  41.           inline: "nearest"
  42.         });
  43.         emptyInput.focus();
  44.       }
  45.     }
  46.   });
  47.  
  48. })();