☰

Auto Copy Selected Text (with deduplication & trim)

Automatically copy selected text to clipboard if it's new and meaningful

  1. // ==UserScript==
  2. // @name         Auto Copy Selected Text (with deduplication & trim)
  3. // @namespace    http://tampermonkey.net/
  4. // @version      1.7
  5. // @description  Automatically copy selected text to clipboard if it's new and meaningful
  6. // @author       liuweiqing
  7. // @match        *://*/*
  8. // @grant        none
  9. // @license      MIT
  10. // @icon         https://icons.iconarchive.com/icons/gartoon-team/gartoon-places/256/user-desktop-icon.png
  11. // ==/UserScript==
  12.  
  13. (function () {
  14.   "use strict";
  15.  
  16.   let lastCopiedText = "";
  17.  
  18.   document.addEventListener("mouseup", () => {
  19.     const selection = window.getSelection();
  20.     const selectedText = selection.toString().trim(); // 去掉前后空白
  21.  
  22.     // 跳过空白内容或与上次相同内容
  23.     if (!selectedText || selectedText === lastCopiedText) return;
  24.  
  25.     lastCopiedText = selectedText;
  26.  
  27.     const range = selection.getRangeAt(0);
  28.     if (navigator.clipboard) {
  29.       navigator.clipboard
  30.         .writeText(selectedText)
  31.         .then(() => {
  32.           console.log("Copied:", selectedText);
  33.         })
  34.         .catch((err) => {
  35.           console.error("Failed to copy", err);
  36.         });
  37.     } else {
  38.       const tempElement = document.createElement("textarea");
  39.       tempElement.value = selectedText;
  40.       document.body.appendChild(tempElement);
  41.       tempElement.select();
  42.       try {
  43.         document.execCommand("copy");
  44.         console.log("Copied (fallback):", selectedText);
  45.         selection.removeAllRanges();
  46.         selection.addRange(range);
  47.       } catch (err) {
  48.         console.error("Fallback copy failed", err);
  49.       }
  50.       document.body.removeChild(tempElement);
  51.     }
  52.   });
  53. })();