// ==UserScript==
// @name         选中自动朗读
// @namespace    http://tampermonkey.net/
// @version      0.2
// @description  任意网页选中自动朗读
// @license     选中自动朗读
// @author       lgldlk
// @match        *://*/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=chrome.com
// @grant        none
// @downloadURL none
// ==/UserScript==

// 定义一个防抖函数
function debounce(fn, delay) {
  let timeout;
  return function () {
    clearTimeout(timeout);
    timeout = setTimeout(() => {
      fn.apply(this, arguments);
    }, delay);
  };
}

(function () {
  'use strict';
  const speakFunc = debounce(function () {
    let text = String(document.getSelection());
    if (!text.length || text.length > 200) return;
    speechSynthesis.cancel();
    speechSynthesis.speak(new SpeechSynthesisUtterance(text));
  }, 300);
  document.addEventListener('selectionchange', speakFunc);
})();