JSFiddle - React, Tailwind, and code Playground

by Константин Дралюк

HTML

<script src="https://npmcdn.com/vue/dist/vue.js"></script>

<div id="exercise">
  <!-- 1) Start the Effect with the Button. The Effect should alternate the "highlight" or "shrink" class on each new setInterval tick (attach respective class to the div with id "effect" below) -->
https://jsfiddle.net/dralyuk/uxb860q6/#run  <div>
    <button @click="startEffect" >Start Effect</button>
    <div id="effect" :class="effectClass"></div>
  </div>
  <!-- 2) Create a couple of CSS classes and attach them via the array syntax -->
  <div>I got no class :(</div>
  <!-- 3) Let the user enter a class (create some example classes) and attach it -->
  <div>
    <input type="text">
    <div></div>
  </div>
  <!-- 4) Let the user enter a class and enter true/ false for another class (create some example classes) and attach the classes -->
  <div>
    <input type="text">
    <input type="text">
    <div></div>
  </div>
  <!-- 5) Repeat 3) but now with values for styles (instead of class names). Attach the respective styles.  -->
  <div>
    <input type="text">
    <div></div>
  </div>
  <!-- 6) Create a simple progress bar with setInterval and style bindings. Start it by hitting the below button. -->
  <div>
    <button v-on:click="startProgress">Start Progress</button>
    <div></div>
  </div>
</div>

CSS

#effect {
  width: 100px;
  height: 100px;
  border: 1px solid black;
}

.highlight {
  background-color: red;
  width: 200px !important;
}

.shrink {
  background-color: gray;
  width: 50px !important;
}

JavaScript

new Vue({
  el: '#exercise',
  data: {
		effectClasses: ['highlight', 'shrink'],
    effectClass: '',
  },
  methods: {
    startEffect: function() {
    	var vm = this;
      setInterval(function(){
      	var classes = vm.effectClasses;
      	vm.effectClass = classes[Math.ceil(Math.random() * classes.length) - 1];
        console.log(Math.ceil(Math.random() * classes.length) - 1);
      }, 1000);
    },
    startProgress: function() {
    
    }
  }
});