JSFiddle - React, Tailwind, and code Playground

by mbudnik

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" v-bind:class="effectClass"></div>
  </div>
  <!-- 2) Create a couple of CSS classes and attach them via the array syntax -->
  <div v-bind:class="['float', 'yellow', 'text-color']">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="userClass">
    <div v-bind:class="[{visible: true}, userClass]"></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" v-model="userClass">
    <input type="text" v-model="isVisible">
    <div v-bind:class="[{visible: isVisible}, userClass]"></div>
  </div>
  <!-- 5) Repeat 3) but now with values for styles (instead of class names). Attach the respective styles.  -->
  <div>
    <input type="text" v-model="userStyle.backgroundColor">
    <div v-bind:style="userStyle"></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 v-bind:class="['progress-bar']" v-bind:style="progressBar"></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;
}

.float {
  float: right;
}

.text-color {
  color: red;
}

.yellow {
  background-color: yellow;
}

.visible {
  width: 100px;
  height: 100px;
}

.progress-bar {
  width: 250px;
  height: 25px;
  border: 1px solid black;
}

JavaScript

new Vue({
  el: '#exercise',
  data: {
    effectClass: {
      highlight: true,
      shrink: false
    },
    userClass: '',
    isVisible: true,
    userStyle: {
      width: '200px',
      height: '200px',
      backgroundColor: 'gray'
    },
    progressBar: {
      width: '0px',
      backgroundColor: 'orange'
    }
  },
  methods: {
    startEffect: function() {
      var vm = this;
      setInterval(function() {
        vm.effectClass.highlight = !vm.effectClass.highlight;
        vm.effectClass.shrink = !vm.effectClass.shrink;
      }, 500)
    },
    startProgress: function() {
      var vm = this;
      var width = 0;
      setInterval(function() {
        width = width + 10;
        vm.progressBar.width = width + 'px';
        }, 500);
      }
    }
  });