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HTML 

              
                <!DOCTYPE html>
<html lang="en">
  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Text To Speech Converter</title>
    <!-- Font Awesome CDN -->
    <link
      rel="stylesheet"
      href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.2.1/css/all.min.css"
    />
    <!-- Stylesheet -->
    <link rel="stylesheet" href="style.css" />
  </head>
  <body>
    <div class="container">
      <div class="controls">
        <button class="btn" id="resume">
          <i class="fa-solid fa-play"></i>
        </button>
        <button class="btn" id="pause">
          <i class="fa-solid fa-pause"></i>
        </button>
      </div>
      <textarea
        placeholder="Enter some text here.."
        id="txt"
        rows="6"
      ></textarea>
      <button id="submit" type="submit">Submit</button>
    </div>
    <!-- Script -->
    <script src="script.js"></script>
  </body>
</html>
!

CSS 

              
                * {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
}
body {
  height: 100vh;
  background: #304988;
}
.container {
  background-color: #ebf2ff;
  width: 90%;
  max-width: 37.5em;
  position: absolute;
  transform: translate(-50%, -50%);
  left: 50%;
  top: 50%;
  border-radius: 0.5em;
  padding: 2em;
  box-shadow: 0 1.87em 3.75em rgba(2, 14, 44, 0.2);
}
textarea {
  font-size: 1em;
  width: 100%;
  border-radius: 0.5em;
  padding: 1em;
  resize: none;
  border: 0.12em solid #040454;
}
#submit {
  font-size: 1.2em;
  display: block;
  width: 50%;
  position: relative;
  margin: auto;
  padding: 1em;
  border: none;
  background: #304988;
  color: #ebf2ff;
  border-radius: 0.3em;
  cursor: pointer;
  margin-top: 2em;
}
.controls {
  width: 100%;
  display: flex;
  justify-content: flex-end;
  margin-bottom: 1em;
}
.controls button {
  display: block;
  width: 3em;
  height: 3em;
  font-size: 1em;
  border-radius: 0.3em;
  cursor: pointer;
  color: #4c7df8;
  border: 0.12em solid #4c7df8;
  background-color: transparent;
}
!

JS 

              
                let text = document.getElementById("txt");

let submitBtn = document.getElementById("submit");
let resumeBtn = document.getElementById("resume");
let pauseBtn = document.getElementById("pause");
let audioMessage;

submitBtn.addEventListener("click", () => {
  //set the text
  audioMessage.text = text.value;
  //speak the text
  window.speechSynthesis.speak(audioMessage);
});

resumeBtn.addEventListener("click", () => {
  pauseBtn.style.display = "block";
  resumeBtn.style.display = "none";
  //resume the audio if it is paused
  if (speechSynthesis.pause) {
    speechSynthesis.resume();
  }
});

pause.addEventListener("click", () => {
  pauseBtn.style.display = "none";
  resumeBtn.style.display = "block";
  //pause if speaking
  speechSynthesis.speaking ? speechSynthesis.pause() : "";
});

window.onload = () => {
  resumeBtn.style.display = "none";
  if ("speechSynthesis" in window) {
    audioMessage = new SpeechSynthesisUtterance();
  } else {
    alert("Speech Synthese is not supported");
  }
};
!
999px

Console