dip/static/js/main.js

var vue = new Vue({
  el: '#dip_main_div',

  data () {
    return {
      title: "Public IP Address service",
      dip: {"ip": null,
            "hostname": null,
            "city": null,
            "country": null},
    }
  },

  mounted () {
    var ip = "";
    if (window.location.pathname.length > 4) {
      ip = window.location.pathname.split("/")[1];
      console.log(ip);
    }
    axios.get(`/json/${ip}`)
      .then(response => {
        this.dip = response.data
      })
      .catch(err => {
        // Manage the state of the application if the request 
        // has failed      
      });
  }
});