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Copy LeetCode Title

Adds a button to copy the LeetCode problem title

  1. // ==UserScript==
  2. // @name         Copy LeetCode Title
  3. // @namespace    http://tampermonkey.net/
  4. // @version      2025-05-17
  5. // @description  Adds a button to copy the LeetCode problem title
  6. // @author       You
  7. // @match        https://leetcode.cn/problems/*
  8. // @icon         https://www.google.com/s2/favicons?sz=64&domain=leetcode.cn
  9. // @grant        none
  10. // @license MIT
  11. // ==/UserScript==
  12.  
  13. (function() {
  14.     'use strict';
  15.  
  16.     function copyToClipboard(text) {
  17.         navigator.clipboard.writeText(text).then(function() {
  18.             console.log('Async: Copying to clipboard was successful!');
  19.         }, function(err) {
  20.             console.error('Async: Could not copy text: ', err);
  21.         });
  22.     }
  23.  
  24.     function addButton() {
  25.         const titleElement = document.querySelector('.text-title-large');
  26.         if (!titleElement) {
  27.             console.error("Could not find the title element.");
  28.             return;
  29.         }
  30.  
  31.         const problemTitle = titleElement.textContent.trim();
  32.  
  33.         const copyButton = document.createElement('button');
  34.         copyButton.textContent = '复制标题';
  35.         copyButton.style.marginLeft = '10px'; // Add some spacing
  36.         copyButton.style.padding = '5px 10px';
  37.         copyButton.style.backgroundColor = '#f0f0f0';
  38.         copyButton.style.border = '1px solid #ccc';
  39.         copyButton.style.borderRadius = '5px';
  40.         copyButton.style.cursor = 'pointer';
  41.  
  42.         copyButton.addEventListener('click', function() {
  43.             copyToClipboard(problemTitle);
  44.             // alert('标题已复制到剪贴板！'); // Provide feedback
  45.         });
  46.  
  47.         const titleContainer = titleElement.parentNode;
  48.         if (titleContainer) {
  49.             titleContainer.appendChild(copyButton);
  50.         } else {
  51.             console.error("Could not find the title container.");
  52.         }
  53.     }
  54.  
  55.     // Add the button after the page loads
  56.     window.addEventListener('load', addButton);
  57. })();