JSFiddle - React, Tailwind, and code Playground

JavaScript

new Vue({
  el: 'app',
  data: {
    items: Array(10 + 1).join(1).split('').map(function(val, key) {
      return { index: key + 1 };
    })
  },
  mounted(){
    this.getOne()
  },
  methods:{
    getOne: function () {
        this.getTwo()
    },
    getTwo: function () {
     alert("Hello")
    }
  }
});