Button chát Facebook cách 2

<style>.fb-livechat, .fb-widget{
  display: none}
  .ctrlq.fb-button, .ctrlq.fb-close{
    position: fixed;
    right: 24px;
    cursor: pointer}
  .ctrlq.fb-button{
    z-index: 999;
    background: url(data:image/svg+xml;base64,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) center no-repeat #0084ff;
    width: 60px;
    height: 60px;
    text-align: center;
    bottom: 30px;
    border: 0;
    outline: 0;
    border-radius: 60px;
    -webkit-border-radius: 60px;
    -moz-border-radius: 60px;
    -ms-border-radius: 60px;
    -o-border-radius: 60px;
    box-shadow: 0 1px 6px rgba(0, 0, 0, .06), 0 2px 32px rgba(0, 0, 0, .16);
    -webkit-transition: box-shadow .2s ease;
    background-size: 80%;
    transition: all .2s ease-in-out}
  .ctrlq.fb-button:focus, .ctrlq.fb-button:hover{
    transform: scale(1.1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, .09), 0 4px 40px rgba(0, 0, 0, .24)}
  .fb-widget{
    background: #fff;
    z-index: 1000;
    position: fixed;
    width: 360px;
    height: 435px;
    overflow: hidden;
    opacity: 0;
    bottom: 0;
    right: 24px;
    border-radius: 6px;
    -o-border-radius: 6px;
    -webkit-border-radius: 6px;
    box-shadow: 0 5px 40px rgba(0, 0, 0, .16);
    -webkit-box-shadow: 0 5px 40px rgba(0, 0, 0, .16);
    -moz-box-shadow: 0 5px 40px rgba(0, 0, 0, .16);
    -o-box-shadow: 0 5px 40px rgba(0, 0, 0, .16)}
  .fb-credit{
    text-align: center;
    margin-top: 8px}
  .fb-credit a{
    transition: none;
    color: #bec2c9;
    font-family: Helvetica, Arial, sans-serif;
    font-size: 12px;
    text-decoration: none;
    border: 0;
    font-weight: 400}
  .ctrlq.fb-overlay{
    z-index: 0;
    position: fixed;
    height: 100vh;
    width: 100vw;
    -webkit-transition: opacity .4s, visibility .4s;
    transition: opacity .4s, visibility .4s;
    top: 0;
    left: 0;
    background: rgba(0, 0, 0, .05);
    display: none}
  .ctrlq.fb-close{
    z-index: 4;
    padding: 0 6px;
    background: #365899;
    font-weight: 700;
    font-size: 11px;
    color: #fff;
    margin: 8px;
    border-radius: 3px}
  .ctrlq.fb-close::after{
    content: "X";
    font-family: sans-serif}
  .bubble{
    width: 20px;
    height: 20px;
    background: #c00;
    color: #fff;
    position: absolute;
    z-index: 999999999;
    text-align: center;
    vertical-align: middle;
    top: -2px;
    left: -5px;
    border-radius: 50%;
  }
  .bubble-msg{
    width: 120px;
    left: -140px;
    top: 5px;
    position: relative;
    background: rgba(59, 89, 152, .8);
    color: #fff;
    padding: 5px 8px;
    border-radius: 8px;
    text-align: center;
    font-size: 13px;
  }
</style>
<div class="fb-livechat">
  <div class="ctrlq fb-overlay">
  </div>
  <div class="fb-widget">
    <div class="ctrlq fb-close">
    </div>
    <div class="fb-page" data-href="https://www.facebook.com/NguyenPhuongBlog" data-tabs="messages" data-width="360" data-height="400" data-small-header="true" data-hide-cover="true" data-show-facepile="false">
    </div>
    <div class="fb-credit">
      <a href="http://www.phuongblog.com" target="_blank">Powered by PhuongNguyen
      </a>
    </div>
    <div id="fb-root">
    </div>
  </div>
  <a href="https://m.me/NguyenPhuongBlog" title="Gửi tin nhắn cho chúng tôi qua Facebook" class="ctrlq fb-button">
    <div class="bubble">1
    </div>
    <div class="bubble-msg">Bạn cần hỗ trợ?
    </div>
  </a>
</div>
<script src="https://connect.facebook.net/en_US/sdk.js#xfbml=1&version=v2.9">
</script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script>$(document).ready(function(){
    function detectmob(){
      if( navigator.userAgent.match(/Android/i) || navigator.userAgent.match(/webOS/i) || navigator.userAgent.match(/iPhone/i) || navigator.userAgent.match(/iPad/i) || navigator.userAgent.match(/iPod/i) || navigator.userAgent.match(/BlackBerry/i) || navigator.userAgent.match(/Windows Phone/i) ){
        return true;
      }
      else{
        return false;
      }
    }
    var t={
      delay: 125, overlay: $(".fb-overlay"), widget: $(".fb-widget"), button: $(".fb-button")};
    setTimeout(function(){
      $("div.fb-livechat").fadeIn()}
               , 8 * t.delay);
    if(!detectmob()){
      $(".ctrlq").on("click", function(e){
        e.preventDefault(), t.overlay.is(":visible") ? (t.overlay.fadeOut(t.delay), t.widget.stop().animate({
          bottom: 0, opacity: 0}
                                                                                                            , 2 * t.delay, function(){
          $(this).hide("slow"), t.button.show()}
                                                                                                           )) : t.button.fadeOut("medium", function(){
          t.widget.stop().show().animate({
            bottom: "30px", opacity: 1}
                                         , 2 * t.delay), t.overlay.fadeIn(t.delay)}
                                                                                                                                )}
                    )}
  }
                         );
</script>