Copy YouTube Channel ID

Adds a 'Copy Channel ID' button to the top of YouTube channels.
当前为 2023-02-25 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name     Copy YouTube Channel ID
// @description Adds a 'Copy Channel ID' button to the top of YouTube channels.
// @version  1.1
// @match    https://*.youtube.com/@*
// @match    https://www.youtube.com/@*
// @match    https://youtube.com/@*
// @match    https://www.youtube.com/@
// @match    https://www.youtube.com/c/*
// @grant    GM_setClipboard
// @grant    GM_registerMenuCommand
// @icon     https://www.google.com/s2/favicons?domain=youtube.com
// @namespace https://github.com/Vandekieft/MonkeyScripts/
// @license  MIT
// ==/UserScript==

// Define a function to copy the channel ID to the clipboard
function copyChannelId() {
  var justTheId = getChannelId();
  var textarea = document.createElement("textarea");
  textarea.value = justTheId;
  document.body.appendChild(textarea);
  textarea.select();
  var range = document.createRange();
  range.selectNodeContents(textarea);
  var selection = window.getSelection();
  selection.removeAllRanges();
  selection.addRange(range);
  document.execCommand("copy");
  selection.removeAllRanges(); // Clear the current selection
  document.body.removeChild(textarea); // Remove the temporary textarea element
}

// Define a function to copy the channel URL to the clipboard
function copyChannelUrl() {
  var justTheId = getChannelId();
  var channelUrl = "http://www.youtube.com/channel/" + justTheId;

  // Copy the URL to the clipboard
  GM_setClipboard(channelUrl);
}

// Register a menu command to copy the channel URL
GM_registerMenuCommand("Copy Channel URL", copyChannelUrl);

// Define a function to redirect to the channel URL
function redirectToChannel() {
  var justTheId = getChannelId();
  if (justTheId) {
    window.location.replace("http://www.youtube.com/channel/" + justTheId);
  }
}

// Register a menu command to redirect to the channel URL
GM_registerMenuCommand("Go to Channel URL", redirectToChannel);

// Register a function to get the channel ID
function getChannelId() {
  var channelUrl = window.location.href;
  var justTheId;

  if (channelUrl.indexOf("youtube.com/channel/") !== -1) {
    // Extract the channel ID from the channel URL
    justTheId = channelUrl.slice(channelUrl.indexOf("youtube.com/channel/") + 20);
  } else {
    // Parse the HTML to extract the channel ID
    var entirePage = document.getElementsByTagName("html")[0].innerHTML;
    var restOfThePage = entirePage.slice(entirePage.indexOf("},\"channelUrl\"") + 48);
    justTheId = restOfThePage.slice(0, restOfThePage.indexOf("\""));
  }

  return justTheId;
}

// Listen for changes to the URL using MutationObserver
var observer = new MutationObserver(function(mutations) {
  mutations.forEach(function(mutation) {
    if (mutation.type === 'attributes' && mutation.attributeName === 'href') {
      // The URL has changed, so update the channel ID
      var justTheId = getChannelId();
    }
  });
});

// Observe changes to the href attribute of the <a> tag containing the channel name
var targetNode = document.querySelector('#text > a');
var config = { attributes: true, childList: false, subtree: false };
observer.observe(targetNode, config);