<div class="container">
  <button class="button">
    <i class="icon-send material-icons">send</i>
    <i class="icon-check material-icons">check</i>
    <span class="button-text">Send Msg</span>
  </button>
</div>

* {
  box-sizing: border-box;
}

html {
  font-size: 62.5%;
}

body {
  font-family: Roboto;
}

.container {
  padding-top: 80px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.button {
  background-color: #4E3CC8;
  padding: 16px 32px;
  border-radius: 32px;
  color: #fff;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  width: 170px;
  outline: none;
  border: none;
  box-shadow: 0px 2px 6px #4E3CC8;
  position: relative;
  &-text {
    transition: transform 200ms ease;
    &.loading:after {
      overflow: hidden;
  display: inline-block;
  vertical-align: bottom;
  -webkit-animation: ellipsis steps(4,end) 900ms infinite;      
  animation: ellipsis steps(4,end) 900ms infinite;
  content: "\2026"; /* ascii code for the ellipsis character */
  width: 0px;
    }
  }
  i {
    font-size: 1.8rem;
  }
  
  .icon-send {
    margin-right: 10px;
    transition: 400ms ease;
  }
  .icon-check {
    margin-right: 10px;
    opacity: 0;
    position: absolute;
    left: 60px;
    transform: translateY(-80px);
    transition: 200ms ease;
    
  }
  
}

.notransition {
  -webkit-transition: none;
  -moz-transition: none;
  -o-transition: none;
  transition: none;
}


@keyframes ellipsis {
  to {
    width: 20px;    
  }
}

@-webkit-keyframes ellipsis {
  to {
    width: 20px;    
  }
}

.material-icons {
  font-family: 'Material Icons';
  font-weight: normal;
  font-style: normal;
  font-size: 24px;  /* Preferred icon size */
  display: inline-block;
  line-height: 1;
  text-transform: none;
  letter-spacing: normal;
  word-wrap: normal;
  white-space: nowrap;
  direction: ltr;

  /* Support for all WebKit browsers. */
  -webkit-font-smoothing: antialiased;
  /* Support for Safari and Chrome. */
  text-rendering: optimizeLegibility;

  /* Support for Firefox. */
  -moz-osx-font-smoothing: grayscale;

  /* Support for IE. */
  font-feature-settings: 'liga';
}

const sendButton = document.querySelector('.button');

sendButton.addEventListener('click', handleClick);


function handleClick() {
  const buttonText = this.querySelector('.button-text');
  const sendIcon = this.querySelector('.icon-send');
  
  sendIcon.style.transform = `scale(0.5) translateX(-200px)`;
  buttonText.textContent = 'Sending';
  buttonText.classList.add('loading');
  buttonText.style.transform = `translateX(-10px)`;
  
  //fake loading state
  setTimeout(() => {
    buttonText.style.transform = `translateY(80px)`;
    buttonText.classList.remove('loading');
    
    
    sendIcon.style.transition = `1000ms ease 230ms`;
    sendIcon.style.transform = `scale(2) translateX(120px)`;
    
    
    sendIcon.addEventListener("webkitTransitionEnd", showSentText);
    
   
  }, 2000);
}

function showSentText() {
  const buttonText = document.querySelector('.button-text');
  const iconCheck = document.querySelector('.icon-check');
  
  iconCheck.style.opacity = `1`;
  
  buttonText.classList.add('notransition');
  buttonText.style.transform = `translateY(-80px)`;
  buttonText.textContent = 'Sent';
  buttonText.offsetHeight;
  buttonText.classList.remove('notransition');
   
  
  iconCheck.style.transform = `translateY(0px)`;
  buttonText.style.transform = `translateY(0px)`;
  
  sendButton.removeEventListener('click', handleClick);
}