How to debug VueJS applications

index.js

// you can check dev/prod mode to enable/disable debug mode, then
// in your main file index.js or index.html insert following lines
if (typeof window !== "undefined" && window !== undefined) {
    Vue.config.devtools = true;
    Vue.config.debug = true;
    // window.vue = new Vue(...); // optional you can expose new or existing main view model to global scope
    window.Vue = Vue;
}