Vue.js modal example

HTML

<script src="https://unpkg.com/vue@next/dist/vue.js"></script>
<script src="https://unpkg.com/vue"></script>
<!-- template for the modal component -->
<link type="text/css" rel="stylesheet" href="//unpkg.com/bootstrap/dist/css/bootstrap.min.css"/>
<link type="text/css" rel="stylesheet" href="//unpkg.com/bootstrap-vue@latest/dist/bootstrap-vue.css"/>


<script src="https://unpkg.com/[email protected]/dist/vue.js"></script>
<script src="//unpkg.com/babel-polyfill@latest/dist/polyfill.min.js"></script>
<script src="//unpkg.com/bootstrap-vue@latest/dist/bootstrap-vue.js"></script>

<!-- app -->
<div id="app">
  <b-button @click="showModal">
      Open Modal
    </b-button>
  <b-modal ref="myModalRef" :modal-class="myclass" size="lg">
      <h2>Test</h2>
      <b-select id="input-horizontal" class="ipt-category" size="sm">
                <option data-content="Methodology">aaaaaassssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssaaaaaaaaaaaaa</option>
                 <option>vv</option>
                  <option>cc</option>
              </b-select>
  </b-modal>
</div>

CSS

.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

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

// start app
new Vue({
  el: '#app',
  data: {
    myclass: ['myclass']
  },
  methods: {
    showModal: function(){
      this.$refs.myModalRef.show()
    }
  }
})