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HTML 

              
                <div class="widget-wrap">
  <div id="talk"></div>
  <h1>JAVASCRIPT VOICE SEARCH</h1>
  
  <form id="search-form" onsubmit="return false;">
    <!-- (A) USUAL SEARCH FIELD & BUTTON -->
    <input type="text" id="search-field"/>
    <input type="submit" value="Search" disabled/>

    <!-- (B) SPEECH SEARCH -->
    <input type="button" id="search-speech" value="Loading" disabled/>
    <div>
      * Search form will not submit. This is only a demo for populating a search field with voice recognition.
    </div>
  </form>
  
  <!-- (X) VISIT CODE-BOXX -->
  <div id="code-boxx">
    Visit
    <a href="https://code-boxx.com/voice-search-javascript-speech-recognition/" target="_blank">
      Code Boxx
    </a> for more details.
  </div>
</div>
!

CSS 

              
                input {
  display: block;
  width: 100%;
  padding: 10px;
  margin: 10px;
}
input[type=button], input[type=submit] {
  background: #b90a0a;
  color: #fff;
  font-weight: 700;
    border: 0;
}

/* (X) DOES NOT MATTER - COSMETICS */
/* PAGE & BODY */
* {
  font-family: arial, sans-serif;
  box-sizing: border-box;
}

body {
  display: flex;
  align-items: center; justify-content: center;
  min-height: 100vh;
  background-image: url(https://images.unsplash.com/photo-1619793906000-a89279ed88e0?crop=entropy&cs=srgb&fm=jpg&ixid=MnwxNDU4OXwwfDF8cmFuZG9tfHx8fHx8fHx8MTY0NzMxMTIzMQ&ixlib=rb-1.2.1&q=85);
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
  text-align: center;
}

/* WIDGET */
.widget-wrap {
  width: 600px;
  padding: 30px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.4);
}

/* SVG */
#talk {
  width: 100%; height:120px;
  background-image: url('data:image/svg+xml;utf8,<svg viewBox="0 0 512 512" width="100" xmlns="http://www.w3.org/2000/svg"><path d="M256 32C114.6 32 0 125.1 0 240c0 49.6 21.4 95 57 130.7C44.5 421.1 2.7 466 2.2 466.5c-2.2 2.3-2.8 5.7-1.5 8.7S4.8 480 8 480c66.3 0 116-31.8 140.6-51.4 32.7 12.3 69 19.4 107.4 19.4 141.4 0 256-93.1 256-208S397.4 32 256 32zM128 272c-17.7 0-32-14.3-32-32s14.3-32 32-32 32 14.3 32 32-14.3 32-32 32zm128 0c-17.7 0-32-14.3-32-32s14.3-32 32-32 32 14.3 32 32-14.3 32-32 32zm128 0c-17.7 0-32-14.3-32-32s14.3-32 32-32 32 14.3 32 32-14.3 32-32 32z" /></svg>');
  background-repeat: no-repeat;
  background-position: center;
}

/* FOOTER */
#code-boxx {
  font-weight: 600;
  margin-top: 30px;
}
#code-boxx a {
  display: inline-block;
  border: 0;
  padding: 5px;
  text-decoration: none;
  background: #b90a0a;
  color: #fff;
}
!

JS 

              
                var voice = {
  // (A) INIT SPEECH RECOGNITION
  sform : null, // HTML SEARCH FORM
  sfield : null, // HTML SEARCH FIELD
  sbtn : null, // HTML VOICE SEARCH BUTTON
  recog : null, // SPEECH RECOGNITION OBJECT
  init : function () {
    // (A1) GET HTML ELEMENTS
    voice.sfrom = document.getElementById("search-form");
    voice.sfield = document.getElementById("search-field");
    voice.sbtn = document.getElementById("search-speech");
 
    // (A2) GET MICROPHONE ACCESS
    navigator.mediaDevices.getUserMedia({ audio: true })
    .then((stream) => {
      // (A3) SPEECH RECOGNITION OBJECT + SETTINGS
      const SpeechRecognition = window.SpeechRecognition || window.webkitSpeechRecognition;
      voice.recog = new SpeechRecognition();
      voice.recog.lang = "en-US";
      voice.recog.continuous = false;
      voice.recog.interimResults = false;
 
      // (A4) POPUPLATE SEARCH FIELD ON SPEECH RECOGNITION
      voice.recog.onresult = (evt) => {
        let said = evt.results[0][0].transcript.toLowerCase();
        voice.sfield.value = said;
        // voice.sform.submit();
        // OR RUN AN AJAX/FETCH SEARCH
        voice.stop();
      };
 
      // (A5) ON SPEECH RECOGNITION ERROR
      voice.recog.onerror = (err) => { console.error(err); };
 
      // (A6) READY!
      voice.sbtn.disabled = false;
      voice.stop();
    })
    .catch((err) => {
      console.error(err);
      voice.sbtn.value = "Please enable access and attach microphone.";
    });
  },
 
  // (B) START SPEECH RECOGNITION
  start : () => {
    voice.recog.start();
    voice.sbtn.onclick = voice.stop;
    voice.sbtn.value = "Speak Now Or Click Again To Cancel";
  },
 
  // (C) STOP/CANCEL SPEECH RECOGNITION
  stop : () => {
    voice.recog.stop();
    voice.sbtn.onclick = voice.start;
    voice.sbtn.value = "Press To Speak";
  }
};
window.addEventListener("DOMContentLoaded", voice.init);
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999px

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