JSFiddle - React, Tailwind, and code Playground

by tarang rathod

HTML

<textarea type="textarea" class="formArea" name="output" onclick="this.focus();this.select()" id="output" cols="70" rows="25" placeholder="Some text"></textarea>
<br>
<div class="btn-group">
  <button value="Combine" class="buttonGroup" onclick="convert()" id="combine1">
    Button
  </button>
  <br>
  <br>
</div>
<br>
<textarea type="textarea" class="formArea" name="output" onclick="this.focus();this.select()" id="output" cols="70" rows="5" placeholder="Some text"></textarea>
<br>
<div class="btn-group">
  <button value="Combine" class="buttonGroup" onclick="convert()" id="combine1">
    Button
  </button>
  <br>
  <br>
</div>
<br>
<ul id="switcher">
  <li id="blackButton"></li>
  <li id="orangeButton"></li>
</ul>

CSS

body {
  background-color: #ec7c23;
}

.btn-group button {
  background-color: #577CC1;
  border: 1px #577CC1;
  color: white;
  padding: 10px 24px;
  cursor: pointer;
  float: left;
  font-weight: bold;
}

.btn-group:after {
  content: "";
  clear: both;
  display: table;
}

.btn-group button:not(:last-child) {
  border-right: none;
}

.btn-group button:hover {
  background-color: #2C3E60;
}

textarea[type="textarea"] {
  width: ;
  padding: 5px 10px;
  margin: 5px 0;
  box-sizing: border-box;
  font-family: arial;
  font-weight: bold;
  border: 10px;
  background-color: #F4F6FA;
  color: darkblue;
  border: 4px solid #577CC1;
  border-radius: 4px;
}

textarea[type="textarea"]:focus {
  border: 4px solid #e66026;
}

h1 {
  line-height: 1.25;
  margin: 2em 0 0;
}

p {
  margin: .5em 0;
}

#switcher {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

#switcher li {
  float: left;
  width: 30px;
  height: 30px;
  margin: 0 15px 15px 0;
  border-radius: 30px;
  border: 3px solid black;
}

#blackButton {
  background: grey;
}

#orangeButton {
  background: #ec7c23;
}

JavaScript

document.getElementById('blackButton').onclick = switchBlack;
    document.getElementById('orangeButton').onclick = switchOrange;
    document.getElementById('orangeButton').onmouseover = switchOrange;
    document.getElementById('blackButton').onmouseover = switchBlack;


    function switchBlack() {



      var body = document.getElementsByTagName('body')
      for (var i = 0; i < body.length; i++) {
        body[i].style.color = 'white';
        body[i].style.backgroundColor = "grey";
        body[i].style.fontFamily = 'terminal';
      }

      var formArea = document.getElementsByClassName('formArea')
      for (var i = 0; i < formArea.length; i++) {
        formArea[i].style.backgroundColor = 'black';
        formArea[i].style.borderColor = 'white';
        formArea[i].style.color = 'white';
        formArea[i].style.fontFamily = 'terminal';
      }

      var buttonGroup = document.getElementsByClassName('buttonGroup')
      for (var i = 0; i < buttonGroup.length; i++) {
        buttonGroup[i].style.backgroundColor = 'white';
        buttonGroup[i].style.color = 'black';
      }

    }



    function switchOrange() {

      var body = document.getElementsByTagName('body')
      for (var i = 0; i < body.length; i++) {
        body[i].style.color = '#2C3E60';
        body[i].style.backgroundColor = "#ec7c23";
        body[i].style.fontFamily = 'arial';
      }
      var formArea = document.getElementsByClassName('formArea')
      for (var i = 0; i < formArea.length; i++) {
        formArea[i].style.backgroundColor = 'lightblue';
        formArea[i].style.borderColor = '#577CC1';
        formArea[i].style.color = 'darkblue';
        formArea[i].style.fontFamily = 'arial';

      }
      var buttonGroup = document.getElementsByClassName('buttonGroup')
      for (var i = 0; i < buttonGroup.length; i++) {
        buttonGroup[i].style.backgroundColor = '#577CC1';
        buttonGroup[i].style.color = 'white';
      }

    }