Full-Stack Vue.js 2 and Laravel 5

Methods
The Vue configuration object also has a section for methods. Methods are not
reactive, so you could define them outside of the Vue configuration without any
difference in functionality, but the advantage to Vue methods is that they are
passed the Vue instance as context and therefore have easy access to your other
properties and methods.
Let's refactor our escapeKeyListener to be a Vue instance method.
app.js: var app = new Vue({ data: { ... }, methods: { escapeKeyListener:
function(evt) { if (evt.keyCode === 27 && this.modalOpen) { this.modalOpen
= false; } } }, watch: { ... },
created: function() { document.addEventListener('keyup',
this.escapeKeyListener); } });