var isRead = true;
var isChoose = true;
const reader = window.speechSynthesis; // 全局定义朗读者，以便朗读和暂停
//获取字符
function getWord() {
  return window.getSelection
    ? window.getSelection()
    : document.selection.createRange().text;
}
//填充字符
function fillingWord() {
  let word = getWord();
  if (isRead) read(word);
  if (!isChoose) return;
  let element = document.getElementById("selected-words");
  element.value = element.value + " " + word;
}
document
  .getElementById("text-content")
  .addEventListener("click", fillingWord, false);
//朗读单词
//@word 要朗读的单词
function read(word) {
  //关闭当前正在读的单词
  reader.cancel();
  //创建新的朗读任务
  let msg = new SpeechSynthesisUtterance(word);
  reader.speak(msg);
}
//关闭正在读的单词
function onReadClick() {
  let isRead = !isRead;
  if (!isRead) {
    reader.cancel();
  }
}
//取消当前选择
function onChooseClick() {
  isChoose = !isChoose;
}

function stopRead() {
  reader.cancel();
}