Like Button with JS

index.html

<script defer src="https://use.fontawesome.com/releases/v5.6.3/js/all.js" integrity="sha384-EIHISlAOj4zgYieurP0SdoiBYfGJKkgWedPHH4jCzpCXLmzVsw1ouK59MuUtP4a1" crossorigin="anonymous"></script>
<!-- Scripts and Links -->

<div class="container">
   <h1> Press "L" to like this</h1>
   <svg class="ico" width="24" height="24" viewBox="0 0 24 24">
  <path d="M12,21.35L10.55,20.03C5.4,15.36 2,12.27 2,8.5C2,5.41 4.42,3 7.5,3C9.24,3 10.91,3.81 12,5.08C13.09,3.81 14.76,3 16.5,3C19.58,3 22,5.41 22,8.5C22,12.27 18.6,15.36 13.45,20.03L12,21.35Z"></path>
</svg>
   <div class="div">

   </div>
</div>

<!-- Logo and Footer -->
<div class="profile">
  <i class="fab fa-codepen" id="codepen"></i>
  <p class="author"><a href="https://codepen.io/jorgert1205/#" target="_blank">/Jorgert1205</a></p>
</div>

<footer class="footer">
  This pen was made by <span><a href="https://reyesj.netlify.com/" target="_blank">Jorge Reyes</a></span>.
</footer>

like-button-with-js.markdown

Like Button with JS

A Pen by Jorge Reyes on CodePen.

License.

script.js

var likeBtn = document.querySelector('.ico');

likeBtn.addEventListener('click', function() {
     likeBtn.classList.toggle('liked');
});

document.addEventListener('keydown', function(key){
   if(key.key === 'l' || key.key === 'L') {
      likeBtn.classList.toggle('liked');
   }
});

style.scss

@import url('https://fonts.googleapis.com/css?family=Lato:300,400,700');

body {
  background-color: #ecf0f1;
  font-family: 'Lato', sans-serif;
  overflow: hidden;
  background-image: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" width="4" height="4" viewBox="0 0 4 4"%3E%3Cpath fill="%239C92AC" fill-opacity="0.4" d="M1 3h1v1H1V3zm2-2h1v1H3V1z"%3E%3C/path%3E%3C/svg%3E');
}

.container {
  display: flex;
   flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 90vh;
}
////////////////////

.ico {
   border-radius: 50%;
   cursor: pointer;
   fill: #232323;
   transition: .4s;
   
}

.liked {
      transform: scale(1.05) rotate(360deg);
      background-color: #C62828;
      padding: .8rem;
   fill: white;
}

////////-FOOTER AND LOGO-////////////
.profile {
  color: #555;
  position: absolute;
  top: .5rem;
  left: 1.5rem;
  display: flex;
  align-items: center;
  font-size: 1rem;
  
  .fa-codepen {
    margin-right: .5rem;
  }
  
  .author {
      
      a:link,
    a:visited {
        color: inherit;
        text-transform: uppercase;
        font-weight: 300;
      text-decoration: none;
    }
  }
  
}
.footer {
  height: 10vh;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  border-top: 1px solid #cdd1d6;
  background-color: #dee1e5;
  font-weight: 300;
  color: #555;
  position: relative;
  
  span {
    margin-left: 2px;
    font-weight: 400;
    cursor: pointer;
     
     a:link,
     a:visited {
        color: currentColor;
        text-decoration: none;
     }
  }
}