JSFiddle - React, Tailwind, and code Playground

by Breno RdV

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) -->
  <div>
    <button @click="startEffect">Start Effect</button>
    <div id="effect" :class="inter"></div>
  </div>
  <!-- 2) Create a couple of CSS classes and attach them via the array syntax -->
  <div :class="['b1', 'b2']">I got no class :(</div>
  <!-- 3) Let the user enter a class (create some example classes) and attach it -->
  <div>
    <input type="text" v-model="dynClass">
    <div class="square" :class="dynClass"></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;
}

.square {
  width: 50px;
  height: 50px;
}

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

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

.b1 {
  font-weight: bold;  
}

.b2 {
  color: red;
}

JavaScript

var v = new Vue({
  el: '#exercise',
  data: {
		inter: "",
    dynClass: ""
  },
  watch: {
  	inter: function() {
    	setInterval(function(){
      	if(v.inter == 'highlight')
        	v.inter = 'shrink';
        else
        	v.inter = 'highlight';
          
      }, 250);
    }  
  },
  methods: {
    startEffect: function() {
    	this.inter = 'highlight';
    }
  }
});