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              <div class="container">
  <h1>robot says:</h1>
  <div class="body-content">
    <!-- dropdownのやつ -->
    <select name="voice" id="voices">
      <option value="">Select A Voice</option>
    <!-- rateのやつ -->
    <label for="rate">Rate:</label>
    <input name="rate" type="range" min="0" max="3" value="1" step="0.1">
    <!-- pitchのやつ -->
    <label for="pitch">Pitch:</label>
    <input name="pitch" type="range" min="0" max="2" step="0.1">
    <!-- textareaのやつ -->
    <textarea name="text">Hello, I'm lucky man</textarea>
    <div id="speak">Speak</div>
              * {
  margin: 0;
  padding: 0;

html {
  background: #f7f7f7;

.container {
  width: 500px;
  margin: 30px auto;
  background: white;

.container > h1 {
  background: #3B5998;
  color: #fff;
  text-align: center;
  padding: 20px 0;

.body-content {
  padding: 30px;

.body-content > select,
.body-content > label,
.body-content > input,
.body-content > textarea {
  display: inline-block;
  width: 440px;

.body-content > select,
.body-content > textarea {
  background: #f7f7f7;
  outline: 0;
  border: 0;

.body-content > select {
  font-size: 16px;

.body-content > textarea {
  height: 100px;
  font-size: 18px;

#speak {
  cursor: pointer;
  font-size: 25px;
  color: #fff;
  background: #3B5998;
  text-align: center;

              var msg = new SpeechSynthesisUtterance();
var voices = [];
var voicesDropdown = document.querySelector('[name="voice"]');
var options = document.querySelectorAll('[type="range"], [name="text"]');
var speakBtn = document.querySelector('#speak');
msg.text = document.querySelector('[name="text"]').value;

function populateVoices() {
  voices = this.getVoices();
  voicesDropdown.innerHTML = voices
  .map(voice => `<option value="${voice.name}">${voice.name}`)

function setVoice() {
  msg.voice = voices.find(voice => voice.name === this.value);
  // 声音を選択したら即時実行する

function toggle() {


function setOption() {
  msg[this.name] = this.value;
  // 変更があったら即時実行する

speechSynthesis.addEventListener('voiceschanged', populateVoices);
voicesDropdown.addEventListener('change', setVoice);
options.forEach(option => option.addEventListener('change', setOption));
speakBtn.addEventListener('click', toggle);


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