extractTextFromHtml.user.js

// ==UserScript==
// @name        拷贝任意选中的 HTML
// @description 方便粘贴到 chatgpt 进行问答
// @namespace   github.com/taowen
// @match       *://*/*
// @version     1.0.0
// @author      taowen
// @license     MIT
// @grant       GM.registerMenuCommand
// @grant       GM_setClipboard
// @grant       GM.getValue
// @grant       GM.setValue
// @grant       GM.xmlHttpRequest
// @require     https://unpkg.com/turndown/dist/turndown.js
// ==/UserScript==
function extractSelectedHtml() {
  let html = "";
  const sel = window.getSelection();
  if (sel.rangeCount) {
      var container = document.createElement("div");
      for (var i = 0, len = sel.rangeCount; i < len; ++i) {
          var frag = sel.getRangeAt(i).cloneContents();
          container.appendChild(frag);
      }
      html = container.innerHTML;
  }
  return html
}
GM.registerMenuCommand("复制当前选中 Html 为 MarkDown", () => {
  const html = extractSelectedHtml();
  const turndownService = new TurndownService()
  const markdown = turndownService.turndown(html)
  GM_setClipboard (markdown);
  alert('copied ' + markdown.length + ' characters');
});