JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//unpkg.com/vue/dist/vue.js"></script>
<script src="//unpkg.com/xe-utils/dist/xe-utils.min.js"></script>
<script src="//unpkg.com/vxe-utils/dist/vxe-utils.min.js"></script>

<div id="app">
  <div>{{ $utils.toDateString(startDate, 'yyyy-dd-MM HH:mm:ss') }}</div>
  <div>{{ endDate }}</div>
</div>

Babel + JSX

Vue.use(VXEUtils, XEUtils)
new Vue({
  data () {
    return {
      startDate: new Date(),
      endDate: null
    }
  },
  created () {
    this.endDate = this.$utils.toDateString(new Date(), 'MM/dd/yyyy HH:mm:ss.SSS')
  }
}).$mount('#app')