Vue.JS - Recursive nesting of two components

This is an example for recursive component, but with two components using instances of the other.

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.0.3/vue.js"></script>
<script type="text/x-template" id="modal-template">
  <transition name="modal">
    <div class="modal-mask">
      <div class="modal-wrapper">
        <div class="modal-container">

          <div class="modal-header">
            <slot name="header">
              default header
            </slot>
          </div>

          <div class="modal-body">
            <slot name="body">
              default body
            </slot>
          </div>

          <div class="modal-footer">
            <slot name="footer">
              default footer
              <button class="modal-default-button" @click="$emit('close')">
                OK
              </button>
            </slot>
          </div>
        </div>
      </div>
    </div>
  </transition>
</script>

<body>
    <div id="app"></div>
</body>

CSS

body {
  margin: 20px;
}
.my-component-a {
  padding: 5px 0px 5px 20px;
  position: fixed;
  background: tomato;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 80%;
  transition: all .3s;
  /* Coment this and it works */
  transform: translateY(200px) 
  /*--------------------------*/
}

.my-component-a.active {
  transform: translateY(0);
  
  /*
  transform: none;
  */
  
}

.my-component-b {
  
}


.modal-mask {
  position: fixed;
  z-index: 9998;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, .5);
  display: table;
  transition: opacity .3s ease;
}

.modal-wrapper {
  display: table-cell;
  vertical-align: middle;
}

.modal-container {
  width: 300px;
  margin: 0px auto;
  padding: 20px 30px;
  background-color: #fff;
  border-radius: 2px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, .33);
  transition: all .3s ease;
  font-family: Helvetica, Arial, sans-serif;
}

.modal-header h3 {
  margin-top: 0;
  color: #42b983;
}

.modal-body {
  margin: 20px 0;
}

.modal-default-button {
  float: right;
}

/*
 * The following styles are auto-applied to elements with
 * transition="modal" when their visibility is toggled
 * by Vue.js.
 *
 * You can easily play with the modal transition by editing
 * these styles.
 */

.modal-enter {
  opacity: 0;
}

.modal-leave-active {
  opacity: 0;
}

.modal-enter .modal-container,
.modal-leave-active .modal-container {
  -webkit-transform: scale(1.1);
  transform: scale(1.1);
}

JavaScript

Vue.component('modal', {
  template: '#modal-template'
})


Vue.component("component-a", {
    template: `
        <div class="my-component-a" :class="{active: slided}">
          <button @click="slided = !slided">Slide div up</button>
        	<button @click="showModal = !showModal">Show modal </button>
            <modal v-if="showModal" @close="showModal = false" />
            
        </div>
    `,
    data: function() {
    return {
      showModal: false,
      slided: false
    }
  }
})

new Vue({
    el: '#app',
    template: `
        <div>
            <h1>Modal:</h1>
            <component-a></component-a>
        </div>
    `
})