Vue

by Max Sinev

HTML

<div id="app">
  <h2>Todos:</h2>
  <div v-bind:class="{ alert: showAlert }" style="width: 50px; height: 50px;"></div>
  <button @click="showAlert = !showAlert">Toggle</button>
</div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#app {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s;
}

.alert {
  background-color: red;
}

li {
  margin: 8px 0;
}

h2 {
  font-weight: bold;
  margin-bottom: 15px;
}

del {
  color: rgba(0, 0, 0, 0.3);
}

Vue

new Vue({
  el: "#app",
  data: {
    showAlert: true
  }
})